./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/gcas_5_safe.c-amalgamation.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/neural-networks/gcas_5_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu --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 c74876b3f0f1df43503b2a84772fdaee8bccd0d64d21a9aae779c5a0ec40b51d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:39:18,008 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:39:18,157 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:39:18,164 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:39:18,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:39:18,209 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:39:18,210 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:39:18,211 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:39:18,213 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:39:18,218 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:39:18,219 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:39:18,220 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:39:18,220 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:39:18,222 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:39:18,223 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:39:18,223 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:39:18,224 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:39:18,224 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:39:18,225 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:39:18,226 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:39:18,226 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:39:18,227 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:39:18,228 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:39:18,228 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:39:18,229 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:39:18,230 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:39:18,231 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:39:18,231 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:39:18,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:39:18,232 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:39:18,234 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:39:18,234 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:39:18,235 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:39:18,249 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:39:18,249 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:39:18,250 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:39:18,250 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:39:18,250 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:39:18,251 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:39:18,251 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_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c74876b3f0f1df43503b2a84772fdaee8bccd0d64d21a9aae779c5a0ec40b51d [2023-11-19 07:39:18,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:39:18,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:39:18,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:39:18,522 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:39:18,523 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:39:18,524 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/neural-networks/gcas_5_safe.c-amalgamation.i [2023-11-19 07:39:21,746 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:39:22,330 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:39:22,334 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/sv-benchmarks/c/neural-networks/gcas_5_safe.c-amalgamation.i [2023-11-19 07:39:22,384 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/data/164cdecd6/885dd1954c914f34829f4874ae13a097/FLAG35fd6a2c9 [2023-11-19 07:39:22,409 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/data/164cdecd6/885dd1954c914f34829f4874ae13a097 [2023-11-19 07:39:22,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:39:22,424 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:39:22,428 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:39:22,429 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:39:22,441 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:39:22,442 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:22" (1/1) ... [2023-11-19 07:39:22,443 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@260339c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:22, skipping insertion in model container [2023-11-19 07:39:22,444 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:22" (1/1) ... [2023-11-19 07:39:22,577 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:39:22,935 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:39:23,780 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_94975cbc-b4ba-4735-ae0b-115919d8a41b/sv-benchmarks/c/neural-networks/gcas_5_safe.c-amalgamation.i[65248,65261] [2023-11-19 07:39:23,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:39:24,133 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:39:24,182 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:39:24,232 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_94975cbc-b4ba-4735-ae0b-115919d8a41b/sv-benchmarks/c/neural-networks/gcas_5_safe.c-amalgamation.i[65248,65261] [2023-11-19 07:39:24,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:39:24,703 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:39:24,711 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:39:24,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:24 WrapperNode [2023-11-19 07:39:24,712 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:39:24,714 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:39:24,714 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:39:24,714 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:39:24,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:24" (1/1) ... [2023-11-19 07:39:24,817 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:24" (1/1) ... [2023-11-19 07:39:24,992 INFO L138 Inliner]: procedures = 620, calls = 2158, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 2547 [2023-11-19 07:39:24,992 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:39:24,993 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:39:24,993 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:39:24,994 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:39:25,006 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:24" (1/1) ... [2023-11-19 07:39:25,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:24" (1/1) ... [2023-11-19 07:39:25,030 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:24" (1/1) ... [2023-11-19 07:39:25,031 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:24" (1/1) ... [2023-11-19 07:39:25,113 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:24" (1/1) ... [2023-11-19 07:39:25,124 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:24" (1/1) ... [2023-11-19 07:39:25,135 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:24" (1/1) ... [2023-11-19 07:39:25,150 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:24" (1/1) ... [2023-11-19 07:39:25,172 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:39:25,173 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:39:25,174 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:39:25,174 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:39:25,175 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:24" (1/1) ... [2023-11-19 07:39:25,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:39:25,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:25,218 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:39:25,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:39:25,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-19 07:39:25,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:39:25,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2023-11-19 07:39:25,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-19 07:39:25,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:39:25,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:39:25,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:39:25,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:39:25,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:39:25,541 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:39:25,544 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:39:31,232 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:39:31,246 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:39:31,247 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-19 07:39:31,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:31 BoogieIcfgContainer [2023-11-19 07:39:31,254 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:39:31,258 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:39:31,258 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:39:31,263 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:39:31,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:39:22" (1/3) ... [2023-11-19 07:39:31,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33dfa4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:31, skipping insertion in model container [2023-11-19 07:39:31,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:24" (2/3) ... [2023-11-19 07:39:31,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33dfa4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:31, skipping insertion in model container [2023-11-19 07:39:31,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:31" (3/3) ... [2023-11-19 07:39:31,270 INFO L112 eAbstractionObserver]: Analyzing ICFG gcas_5_safe.c-amalgamation.i [2023-11-19 07:39:31,293 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:39:31,293 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:39:31,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:39:31,381 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;@6ee6239b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:39:31,381 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:39:31,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 93 states have (on average 1.5913978494623655) internal successors, (148), 94 states have internal predecessors, (148), 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) [2023-11-19 07:39:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 07:39:31,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:31,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:31,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:31,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:31,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1072681316, now seen corresponding path program 1 times [2023-11-19 07:39:31,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:31,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722722188] [2023-11-19 07:39:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:31,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:32,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:32,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722722188] [2023-11-19 07:39:32,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722722188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:32,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:32,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:39:32,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692474644] [2023-11-19 07:39:32,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:32,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:39:32,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:32,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:39:32,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:39:32,465 INFO L87 Difference]: Start difference. First operand has 95 states, 93 states have (on average 1.5913978494623655) internal successors, (148), 94 states have internal predecessors, (148), 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 2 states, 2 states have (on average 31.5) internal successors, (63), 2 states have internal predecessors, (63), 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) [2023-11-19 07:39:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:32,497 INFO L93 Difference]: Finished difference Result 186 states and 290 transitions. [2023-11-19 07:39:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:39:32,500 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.5) internal successors, (63), 2 states have internal predecessors, (63), 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 63 [2023-11-19 07:39:32,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:32,510 INFO L225 Difference]: With dead ends: 186 [2023-11-19 07:39:32,510 INFO L226 Difference]: Without dead ends: 91 [2023-11-19 07:39:32,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:39:32,519 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:32,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:39:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-19 07:39:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-11-19 07:39:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.3111111111111111) internal successors, (118), 90 states have internal predecessors, (118), 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) [2023-11-19 07:39:32,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2023-11-19 07:39:32,576 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 63 [2023-11-19 07:39:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:32,576 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2023-11-19 07:39:32,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.5) internal successors, (63), 2 states have internal predecessors, (63), 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) [2023-11-19 07:39:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2023-11-19 07:39:32,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 07:39:32,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:32,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:32,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:39:32,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:32,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:32,582 INFO L85 PathProgramCache]: Analyzing trace with hash -449488490, now seen corresponding path program 1 times [2023-11-19 07:39:32,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:32,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507295556] [2023-11-19 07:39:32,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:32,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:33,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:33,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507295556] [2023-11-19 07:39:33,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507295556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:33,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:33,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:39:33,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213729620] [2023-11-19 07:39:33,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:33,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:33,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:33,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:33,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:33,232 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-19 07:39:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:33,390 INFO L93 Difference]: Finished difference Result 173 states and 224 transitions. [2023-11-19 07:39:33,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:33,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2023-11-19 07:39:33,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:33,397 INFO L225 Difference]: With dead ends: 173 [2023-11-19 07:39:33,397 INFO L226 Difference]: Without dead ends: 91 [2023-11-19 07:39:33,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:33,400 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 0 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:33,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 231 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:39:33,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-19 07:39:33,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-11-19 07:39:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.3) internal successors, (117), 90 states have internal predecessors, (117), 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) [2023-11-19 07:39:33,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2023-11-19 07:39:33,428 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 63 [2023-11-19 07:39:33,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:33,430 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2023-11-19 07:39:33,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-19 07:39:33,430 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2023-11-19 07:39:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 07:39:33,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:33,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:33,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:39:33,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:33,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:33,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1836273900, now seen corresponding path program 1 times [2023-11-19 07:39:33,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:33,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378118031] [2023-11-19 07:39:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:33,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:33,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:33,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378118031] [2023-11-19 07:39:33,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378118031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:33,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:33,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:39:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931851066] [2023-11-19 07:39:33,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:33,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:33,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:33,953 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-19 07:39:34,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:34,102 INFO L93 Difference]: Finished difference Result 140 states and 179 transitions. [2023-11-19 07:39:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:34,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2023-11-19 07:39:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:34,105 INFO L225 Difference]: With dead ends: 140 [2023-11-19 07:39:34,106 INFO L226 Difference]: Without dead ends: 91 [2023-11-19 07:39:34,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:34,108 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 0 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:34,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 229 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:39:34,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-19 07:39:34,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-11-19 07:39:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.288888888888889) internal successors, (116), 90 states have internal predecessors, (116), 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) [2023-11-19 07:39:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2023-11-19 07:39:34,119 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 63 [2023-11-19 07:39:34,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:34,120 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2023-11-19 07:39:34,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-19 07:39:34,121 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2023-11-19 07:39:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 07:39:34,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:34,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:34,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:39:34,123 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:34,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:34,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2055128618, now seen corresponding path program 1 times [2023-11-19 07:39:34,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:34,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111021277] [2023-11-19 07:39:34,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:34,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:34,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:34,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111021277] [2023-11-19 07:39:34,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111021277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:34,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:34,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:39:34,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985457155] [2023-11-19 07:39:34,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:34,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:34,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:34,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:34,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:34,680 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-19 07:39:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:34,927 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2023-11-19 07:39:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:34,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2023-11-19 07:39:34,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:34,932 INFO L225 Difference]: With dead ends: 94 [2023-11-19 07:39:34,935 INFO L226 Difference]: Without dead ends: 91 [2023-11-19 07:39:34,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:34,938 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:34,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 227 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:39:34,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-19 07:39:34,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-11-19 07:39:34,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 90 states have internal predecessors, (115), 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) [2023-11-19 07:39:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2023-11-19 07:39:34,950 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 63 [2023-11-19 07:39:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:34,951 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2023-11-19 07:39:34,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-19 07:39:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2023-11-19 07:39:34,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 07:39:34,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:34,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:34,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:39:34,955 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:34,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:34,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2055130540, now seen corresponding path program 1 times [2023-11-19 07:39:34,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:34,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683662740] [2023-11-19 07:39:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:34,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:35,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:35,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683662740] [2023-11-19 07:39:35,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683662740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:35,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:35,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:39:35,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304708144] [2023-11-19 07:39:35,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:35,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:35,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:35,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:35,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:35,674 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-19 07:39:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:35,723 INFO L93 Difference]: Finished difference Result 128 states and 161 transitions. [2023-11-19 07:39:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:35,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2023-11-19 07:39:35,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:35,729 INFO L225 Difference]: With dead ends: 128 [2023-11-19 07:39:35,729 INFO L226 Difference]: Without dead ends: 95 [2023-11-19 07:39:35,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:35,736 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 4 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:35,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 218 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:39:35,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-19 07:39:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2023-11-19 07:39:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 91 states have internal predecessors, (116), 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) [2023-11-19 07:39:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2023-11-19 07:39:35,764 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 63 [2023-11-19 07:39:35,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:35,767 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2023-11-19 07:39:35,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-19 07:39:35,768 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2023-11-19 07:39:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 07:39:35,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:35,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:35,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:39:35,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:35,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:35,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1387630085, now seen corresponding path program 1 times [2023-11-19 07:39:35,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:35,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555964962] [2023-11-19 07:39:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:35,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:36,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:36,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555964962] [2023-11-19 07:39:36,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555964962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:36,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212667638] [2023-11-19 07:39:36,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:36,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:36,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:36,661 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:36,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:39:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:37,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:39:37,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:37,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:39:37,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212667638] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:37,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:37,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-19 07:39:37,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475203410] [2023-11-19 07:39:37,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:37,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:37,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:37,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:37,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:39:37,649 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-11-19 07:39:37,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:37,671 INFO L93 Difference]: Finished difference Result 110 states and 137 transitions. [2023-11-19 07:39:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:37,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2023-11-19 07:39:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:37,673 INFO L225 Difference]: With dead ends: 110 [2023-11-19 07:39:37,673 INFO L226 Difference]: Without dead ends: 93 [2023-11-19 07:39:37,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:39:37,675 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:37,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 217 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:39:37,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-19 07:39:37,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-19 07:39:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 92 states have internal predecessors, (117), 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) [2023-11-19 07:39:37,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2023-11-19 07:39:37,683 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 67 [2023-11-19 07:39:37,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:37,684 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2023-11-19 07:39:37,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-11-19 07:39:37,684 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2023-11-19 07:39:37,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-19 07:39:37,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:37,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:37,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:37,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:37,905 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:37,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:37,906 INFO L85 PathProgramCache]: Analyzing trace with hash -464869472, now seen corresponding path program 1 times [2023-11-19 07:39:37,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:37,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617195585] [2023-11-19 07:39:37,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:37,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:39:38,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:38,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617195585] [2023-11-19 07:39:38,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617195585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:38,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068528995] [2023-11-19 07:39:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:38,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:38,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:38,615 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:38,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:39:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:39,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:39:39,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:39:39,494 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:39,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068528995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:39,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:39:39,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 07:39:39,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105799253] [2023-11-19 07:39:39,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:39,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:39,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:39,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:39,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:39:39,498 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2023-11-19 07:39:39,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:39,522 INFO L93 Difference]: Finished difference Result 142 states and 178 transitions. [2023-11-19 07:39:39,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:39,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2023-11-19 07:39:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:39,525 INFO L225 Difference]: With dead ends: 142 [2023-11-19 07:39:39,525 INFO L226 Difference]: Without dead ends: 101 [2023-11-19 07:39:39,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:39:39,527 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 9 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:39,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 220 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:39:39,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-19 07:39:39,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2023-11-19 07:39:39,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 93 states have internal predecessors, (118), 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) [2023-11-19 07:39:39,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2023-11-19 07:39:39,535 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 71 [2023-11-19 07:39:39,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:39,574 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2023-11-19 07:39:39,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2023-11-19 07:39:39,574 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2023-11-19 07:39:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-19 07:39:39,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:39,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:39,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:39,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:39,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:39,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:39,778 INFO L85 PathProgramCache]: Analyzing trace with hash 306223000, now seen corresponding path program 1 times [2023-11-19 07:39:39,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:39,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795999275] [2023-11-19 07:39:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:39,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:39:40,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:40,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795999275] [2023-11-19 07:39:40,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795999275] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:40,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397564876] [2023-11-19 07:39:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:40,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:40,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:40,511 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:40,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:39:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:41,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:39:41,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:39:41,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:39:41,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397564876] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:41,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:41,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-19 07:39:41,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181734418] [2023-11-19 07:39:41,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:41,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:41,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:41,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:41,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:39:41,541 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2023-11-19 07:39:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:41,563 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2023-11-19 07:39:41,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:41,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 75 [2023-11-19 07:39:41,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:41,570 INFO L225 Difference]: With dead ends: 119 [2023-11-19 07:39:41,570 INFO L226 Difference]: Without dead ends: 95 [2023-11-19 07:39:41,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:39:41,574 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 9 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:41,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 213 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:39:41,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-19 07:39:41,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-11-19 07:39:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 94 states have internal predecessors, (119), 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) [2023-11-19 07:39:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 119 transitions. [2023-11-19 07:39:41,593 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 119 transitions. Word has length 75 [2023-11-19 07:39:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:41,593 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 119 transitions. [2023-11-19 07:39:41,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2023-11-19 07:39:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 119 transitions. [2023-11-19 07:39:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-19 07:39:41,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:41,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:41,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:41,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:41,817 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:41,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:41,817 INFO L85 PathProgramCache]: Analyzing trace with hash 599161680, now seen corresponding path program 1 times [2023-11-19 07:39:41,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:41,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770920941] [2023-11-19 07:39:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:41,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:39:42,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:42,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770920941] [2023-11-19 07:39:42,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770920941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:42,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478618396] [2023-11-19 07:39:42,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:42,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:42,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:42,449 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:42,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:39:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:43,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:39:43,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:39:43,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:39:43,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478618396] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:43,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:43,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-19 07:39:43,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403737873] [2023-11-19 07:39:43,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:43,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:43,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:43,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:43,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:39:43,334 INFO L87 Difference]: Start difference. First operand 95 states and 119 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2023-11-19 07:39:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:43,351 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2023-11-19 07:39:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:43,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2023-11-19 07:39:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:43,354 INFO L225 Difference]: With dead ends: 103 [2023-11-19 07:39:43,354 INFO L226 Difference]: Without dead ends: 96 [2023-11-19 07:39:43,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:39:43,355 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 9 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:43,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 213 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:39:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-19 07:39:43,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-11-19 07:39:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.263157894736842) internal successors, (120), 95 states have internal predecessors, (120), 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) [2023-11-19 07:39:43,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2023-11-19 07:39:43,362 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 79 [2023-11-19 07:39:43,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:43,362 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2023-11-19 07:39:43,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2023-11-19 07:39:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2023-11-19 07:39:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-19 07:39:43,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:43,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:43,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:43,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:43,581 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:43,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:43,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1172081720, now seen corresponding path program 1 times [2023-11-19 07:39:43,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:43,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881506658] [2023-11-19 07:39:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:43,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:39:44,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:44,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881506658] [2023-11-19 07:39:44,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881506658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:44,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067215846] [2023-11-19 07:39:44,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:44,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:44,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:44,229 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:44,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:39:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:45,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 2706 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:39:45,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:39:45,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:39:45,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067215846] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:45,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:39:45,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 07:39:45,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280761914] [2023-11-19 07:39:45,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:45,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:39:45,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:45,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:39:45,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:39:45,266 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 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) [2023-11-19 07:39:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:45,351 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2023-11-19 07:39:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:39:45,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 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 83 [2023-11-19 07:39:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:45,354 INFO L225 Difference]: With dead ends: 144 [2023-11-19 07:39:45,354 INFO L226 Difference]: Without dead ends: 108 [2023-11-19 07:39:45,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:39:45,357 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 20 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:45,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 328 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:39:45,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-19 07:39:45,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-11-19 07:39:45,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.2616822429906542) internal successors, (135), 107 states have internal predecessors, (135), 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) [2023-11-19 07:39:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 135 transitions. [2023-11-19 07:39:45,368 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 135 transitions. Word has length 83 [2023-11-19 07:39:45,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:45,369 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 135 transitions. [2023-11-19 07:39:45,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 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) [2023-11-19 07:39:45,370 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 135 transitions. [2023-11-19 07:39:45,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-19 07:39:45,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:45,371 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:45,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:45,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:45,593 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:45,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:45,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1359786557, now seen corresponding path program 2 times [2023-11-19 07:39:45,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:45,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989640172] [2023-11-19 07:39:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:45,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:39:46,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:46,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989640172] [2023-11-19 07:39:46,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989640172] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:46,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807123473] [2023-11-19 07:39:46,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:39:46,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:46,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:46,446 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:46,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:39:47,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:39:47,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:39:47,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 2748 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:39:47,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:39:47,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-19 07:39:47,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807123473] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:47,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:39:47,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 11 [2023-11-19 07:39:47,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098419209] [2023-11-19 07:39:47,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:47,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:39:47,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:47,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:39:47,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:39:47,471 INFO L87 Difference]: Start difference. First operand 108 states and 135 transitions. Second operand has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 11 states have internal predecessors, (122), 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) [2023-11-19 07:39:47,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:47,658 INFO L93 Difference]: Finished difference Result 163 states and 206 transitions. [2023-11-19 07:39:47,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:39:47,659 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 11 states have internal predecessors, (122), 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 95 [2023-11-19 07:39:47,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:47,660 INFO L225 Difference]: With dead ends: 163 [2023-11-19 07:39:47,660 INFO L226 Difference]: Without dead ends: 127 [2023-11-19 07:39:47,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:39:47,662 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 28 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:47,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 545 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:39:47,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-19 07:39:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2023-11-19 07:39:47,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.2601626016260163) internal successors, (155), 123 states have internal predecessors, (155), 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) [2023-11-19 07:39:47,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2023-11-19 07:39:47,670 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 95 [2023-11-19 07:39:47,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:47,671 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2023-11-19 07:39:47,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 11 states have internal predecessors, (122), 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) [2023-11-19 07:39:47,672 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2023-11-19 07:39:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-19 07:39:47,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:47,673 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:47,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-19 07:39:47,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:39:47,897 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:47,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:47,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1704188461, now seen corresponding path program 3 times [2023-11-19 07:39:47,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:47,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152878913] [2023-11-19 07:39:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:47,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-19 07:39:49,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:49,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152878913] [2023-11-19 07:39:49,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152878913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:49,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874463412] [2023-11-19 07:39:49,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:39:49,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:49,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:49,009 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:49,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:39:50,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:39:50,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:39:50,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 2706 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:39:50,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-19 07:39:50,111 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:50,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874463412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:50,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:39:50,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-19 07:39:50,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747495403] [2023-11-19 07:39:50,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:50,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:39:50,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:50,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:39:50,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:39:50,114 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2023-11-19 07:39:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:50,142 INFO L93 Difference]: Finished difference Result 174 states and 217 transitions. [2023-11-19 07:39:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:39:50,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 111 [2023-11-19 07:39:50,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:50,144 INFO L225 Difference]: With dead ends: 174 [2023-11-19 07:39:50,144 INFO L226 Difference]: Without dead ends: 129 [2023-11-19 07:39:50,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:39:50,146 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 17 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:50,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 317 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:39:50,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-19 07:39:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2023-11-19 07:39:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.2580645161290323) internal successors, (156), 124 states have internal predecessors, (156), 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) [2023-11-19 07:39:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 156 transitions. [2023-11-19 07:39:50,153 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 156 transitions. Word has length 111 [2023-11-19 07:39:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:50,153 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 156 transitions. [2023-11-19 07:39:50,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2023-11-19 07:39:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 156 transitions. [2023-11-19 07:39:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-19 07:39:50,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:50,155 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:50,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:50,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:39:50,382 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:50,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:50,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1850533157, now seen corresponding path program 1 times [2023-11-19 07:39:50,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:50,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693341245] [2023-11-19 07:39:50,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:50,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 07:39:51,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:51,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693341245] [2023-11-19 07:39:51,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693341245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:51,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022242181] [2023-11-19 07:39:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:51,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:51,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:51,317 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:51,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:39:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:52,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 2830 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:39:52,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-19 07:39:52,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:52,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022242181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:52,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:39:52,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-19 07:39:52,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625360990] [2023-11-19 07:39:52,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:52,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:39:52,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:52,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:39:52,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:39:52,182 INFO L87 Difference]: Start difference. First operand 125 states and 156 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2023-11-19 07:39:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:52,211 INFO L93 Difference]: Finished difference Result 210 states and 262 transitions. [2023-11-19 07:39:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:39:52,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 115 [2023-11-19 07:39:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:52,213 INFO L225 Difference]: With dead ends: 210 [2023-11-19 07:39:52,213 INFO L226 Difference]: Without dead ends: 130 [2023-11-19 07:39:52,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:39:52,214 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 22 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:52,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 216 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:39:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-19 07:39:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2023-11-19 07:39:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.256) internal successors, (157), 125 states have internal predecessors, (157), 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) [2023-11-19 07:39:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 157 transitions. [2023-11-19 07:39:52,221 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 157 transitions. Word has length 115 [2023-11-19 07:39:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:52,222 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 157 transitions. [2023-11-19 07:39:52,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2023-11-19 07:39:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 157 transitions. [2023-11-19 07:39:52,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-19 07:39:52,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:52,224 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:52,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:52,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:39:52,437 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:52,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:52,437 INFO L85 PathProgramCache]: Analyzing trace with hash -780571101, now seen corresponding path program 1 times [2023-11-19 07:39:52,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:52,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292720589] [2023-11-19 07:39:52,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:52,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-19 07:39:53,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:53,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292720589] [2023-11-19 07:39:53,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292720589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:53,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948040222] [2023-11-19 07:39:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:53,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:53,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:53,285 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:53,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:39:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:54,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 2844 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:39:54,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-19 07:39:54,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-19 07:39:54,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948040222] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:54,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:54,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 6] total 14 [2023-11-19 07:39:54,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232701983] [2023-11-19 07:39:54,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:54,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:39:54,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:54,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:39:54,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:39:54,270 INFO L87 Difference]: Start difference. First operand 126 states and 157 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2023-11-19 07:39:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:54,310 INFO L93 Difference]: Finished difference Result 173 states and 215 transitions. [2023-11-19 07:39:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:39:54,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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 119 [2023-11-19 07:39:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:54,313 INFO L225 Difference]: With dead ends: 173 [2023-11-19 07:39:54,313 INFO L226 Difference]: Without dead ends: 127 [2023-11-19 07:39:54,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:39:54,314 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 10 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:54,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 321 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:39:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-19 07:39:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-11-19 07:39:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.253968253968254) internal successors, (158), 126 states have internal predecessors, (158), 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) [2023-11-19 07:39:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2023-11-19 07:39:54,323 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 119 [2023-11-19 07:39:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:54,323 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2023-11-19 07:39:54,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2023-11-19 07:39:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2023-11-19 07:39:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-19 07:39:54,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:54,325 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:54,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:54,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:39:54,541 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:54,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:54,542 INFO L85 PathProgramCache]: Analyzing trace with hash 520079681, now seen corresponding path program 1 times [2023-11-19 07:39:54,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:54,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666736527] [2023-11-19 07:39:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:54,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-19 07:39:55,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:55,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666736527] [2023-11-19 07:39:55,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666736527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:55,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917132118] [2023-11-19 07:39:55,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:55,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:55,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:55,478 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:55,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:39:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:56,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 2849 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:39:56,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:39:56,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-19 07:39:56,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917132118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:56,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:39:56,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 7] total 18 [2023-11-19 07:39:56,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134934086] [2023-11-19 07:39:56,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:56,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:39:56,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:56,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:39:56,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:39:56,653 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand has 18 states, 18 states have (on average 9.222222222222221) internal successors, (166), 18 states have internal predecessors, (166), 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) [2023-11-19 07:39:57,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:57,125 INFO L93 Difference]: Finished difference Result 208 states and 264 transitions. [2023-11-19 07:39:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:39:57,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.222222222222221) internal successors, (166), 18 states have internal predecessors, (166), 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 121 [2023-11-19 07:39:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:57,130 INFO L225 Difference]: With dead ends: 208 [2023-11-19 07:39:57,131 INFO L226 Difference]: Without dead ends: 158 [2023-11-19 07:39:57,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:39:57,134 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 69 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:57,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 902 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:39:57,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-19 07:39:57,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 155. [2023-11-19 07:39:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.2532467532467533) internal successors, (193), 154 states have internal predecessors, (193), 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) [2023-11-19 07:39:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 193 transitions. [2023-11-19 07:39:57,143 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 193 transitions. Word has length 121 [2023-11-19 07:39:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:57,144 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 193 transitions. [2023-11-19 07:39:57,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.222222222222221) internal successors, (166), 18 states have internal predecessors, (166), 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) [2023-11-19 07:39:57,144 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 193 transitions. [2023-11-19 07:39:57,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-19 07:39:57,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:57,146 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:57,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:57,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:39:57,353 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:57,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:57,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1455122554, now seen corresponding path program 2 times [2023-11-19 07:39:57,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:57,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370998267] [2023-11-19 07:39:57,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:57,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-19 07:39:58,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:58,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370998267] [2023-11-19 07:39:58,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370998267] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:58,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631516826] [2023-11-19 07:39:58,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:39:58,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:58,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:58,253 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:58,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:39:59,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:39:59,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:39:59,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 07:39:59,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-19 07:39:59,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 132 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 07:39:59,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631516826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:59,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:39:59,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 16] total 24 [2023-11-19 07:39:59,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052356486] [2023-11-19 07:39:59,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:59,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:39:59,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:59,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:39:59,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:39:59,680 INFO L87 Difference]: Start difference. First operand 155 states and 193 transitions. Second operand has 24 states, 24 states have (on average 6.958333333333333) internal successors, (167), 24 states have internal predecessors, (167), 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) [2023-11-19 07:40:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:00,454 INFO L93 Difference]: Finished difference Result 261 states and 331 transitions. [2023-11-19 07:40:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:40:00,455 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.958333333333333) internal successors, (167), 24 states have internal predecessors, (167), 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 149 [2023-11-19 07:40:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:00,457 INFO L225 Difference]: With dead ends: 261 [2023-11-19 07:40:00,457 INFO L226 Difference]: Without dead ends: 187 [2023-11-19 07:40:00,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:40:00,458 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 78 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:00,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1671 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:40:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-19 07:40:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2023-11-19 07:40:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.2526881720430108) internal successors, (233), 186 states have internal predecessors, (233), 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) [2023-11-19 07:40:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 233 transitions. [2023-11-19 07:40:00,469 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 233 transitions. Word has length 149 [2023-11-19 07:40:00,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:00,470 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 233 transitions. [2023-11-19 07:40:00,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.958333333333333) internal successors, (167), 24 states have internal predecessors, (167), 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) [2023-11-19 07:40:00,470 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 233 transitions. [2023-11-19 07:40:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-19 07:40:00,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:00,473 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:00,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:00,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:40:00,692 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:00,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:00,693 INFO L85 PathProgramCache]: Analyzing trace with hash -820178754, now seen corresponding path program 3 times [2023-11-19 07:40:00,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:00,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674404386] [2023-11-19 07:40:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:00,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-19 07:40:02,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:02,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674404386] [2023-11-19 07:40:02,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674404386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:02,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036910720] [2023-11-19 07:40:02,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:40:02,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:02,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:02,260 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:02,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94975cbc-b4ba-4735-ae0b-115919d8a41b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process