./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-52.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-52.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl --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 65e290fb975399bc2cc283273eaab9fa300db5fe57e6fb279b59522887532a83 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:14:18,838 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:14:18,938 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:14:18,944 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:14:18,944 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:14:18,976 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:14:18,976 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:14:18,977 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:14:18,978 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:14:18,979 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:14:18,979 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:14:18,980 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:14:18,981 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:14:18,981 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:14:18,982 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:14:18,983 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:14:18,983 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:14:18,984 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:14:18,984 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:14:18,985 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:14:18,985 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:14:18,986 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:14:18,987 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:14:18,988 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:14:18,988 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:14:18,989 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:14:18,989 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:14:18,990 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:14:18,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:14:18,991 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:14:18,992 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:14:18,992 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:14:18,993 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:14:18,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:14:18,994 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:14:18,994 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:14:18,995 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:14:18,995 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:14:18,995 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:14:18,996 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_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65e290fb975399bc2cc283273eaab9fa300db5fe57e6fb279b59522887532a83 [2023-11-12 02:14:19,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:14:19,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:14:19,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:14:19,304 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:14:19,304 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:14:19,305 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-52.i [2023-11-12 02:14:22,535 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:14:22,867 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:14:22,870 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-52.i [2023-11-12 02:14:22,882 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/data/a05261152/03b70a0dd73747a19b91a5efc3ee4aea/FLAGb1b468b0d [2023-11-12 02:14:22,896 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/data/a05261152/03b70a0dd73747a19b91a5efc3ee4aea [2023-11-12 02:14:22,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:14:22,900 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:14:22,902 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:14:22,902 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:14:22,919 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:14:22,920 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:14:22" (1/1) ... [2023-11-12 02:14:22,921 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1623de66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:22, skipping insertion in model container [2023-11-12 02:14:22,926 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:14:22" (1/1) ... [2023-11-12 02:14:22,976 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:14:23,121 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_7c14c524-3ac6-4097-927e-c1e5c67803bb/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-52.i[919,932] [2023-11-12 02:14:23,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:14:23,240 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:14:23,250 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_7c14c524-3ac6-4097-927e-c1e5c67803bb/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-52.i[919,932] [2023-11-12 02:14:23,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:14:23,309 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:14:23,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:23 WrapperNode [2023-11-12 02:14:23,310 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:14:23,311 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:14:23,311 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:14:23,311 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:14:23,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:23" (1/1) ... [2023-11-12 02:14:23,331 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:23" (1/1) ... [2023-11-12 02:14:23,384 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 204 [2023-11-12 02:14:23,385 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:14:23,386 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:14:23,387 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:14:23,387 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:14:23,396 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:23" (1/1) ... [2023-11-12 02:14:23,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:23" (1/1) ... [2023-11-12 02:14:23,401 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:23" (1/1) ... [2023-11-12 02:14:23,402 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:23" (1/1) ... [2023-11-12 02:14:23,415 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:23" (1/1) ... [2023-11-12 02:14:23,420 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:23" (1/1) ... [2023-11-12 02:14:23,423 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:23" (1/1) ... [2023-11-12 02:14:23,426 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:23" (1/1) ... [2023-11-12 02:14:23,431 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:14:23,432 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:14:23,432 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:14:23,432 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:14:23,433 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:23" (1/1) ... [2023-11-12 02:14:23,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:14:23,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:23,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:14:23,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:14:23,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:14:23,532 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:14:23,533 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:14:23,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:14:23,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:14:23,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:14:23,656 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:14:23,658 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:14:24,167 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:14:24,174 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:14:24,175 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:14:24,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:14:24 BoogieIcfgContainer [2023-11-12 02:14:24,177 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:14:24,222 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:14:24,222 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:14:24,225 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:14:24,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:14:22" (1/3) ... [2023-11-12 02:14:24,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16934faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:14:24, skipping insertion in model container [2023-11-12 02:14:24,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:23" (2/3) ... [2023-11-12 02:14:24,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16934faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:14:24, skipping insertion in model container [2023-11-12 02:14:24,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:14:24" (3/3) ... [2023-11-12 02:14:24,227 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pr-co_file-52.i [2023-11-12 02:14:24,249 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:14:24,250 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:14:24,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:14:24,330 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;@4c4f6b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:14:24,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:14:24,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 59 states have (on average 1.4915254237288136) internal successors, (88), 60 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-12 02:14:24,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-12 02:14:24,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:24,355 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:24,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:24,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:24,361 INFO L85 PathProgramCache]: Analyzing trace with hash 833143181, now seen corresponding path program 1 times [2023-11-12 02:14:24,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:24,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125393555] [2023-11-12 02:14:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:24,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:24,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:24,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996844614] [2023-11-12 02:14:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:24,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:24,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:24,574 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:24,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:14:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:24,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:14:24,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:14:25,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:25,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:25,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125393555] [2023-11-12 02:14:25,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:25,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996844614] [2023-11-12 02:14:25,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996844614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:25,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:25,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:14:25,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895067931] [2023-11-12 02:14:25,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:25,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:25,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:25,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:25,275 INFO L87 Difference]: Start difference. First operand has 84 states, 59 states have (on average 1.4915254237288136) internal successors, (88), 60 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:14:25,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:25,439 INFO L93 Difference]: Finished difference Result 232 states and 421 transitions. [2023-11-12 02:14:25,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:25,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 152 [2023-11-12 02:14:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:25,457 INFO L225 Difference]: With dead ends: 232 [2023-11-12 02:14:25,457 INFO L226 Difference]: Without dead ends: 151 [2023-11-12 02:14:25,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:25,465 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 43 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:25,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 225 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-12 02:14:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2023-11-12 02:14:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 86 states have (on average 1.3953488372093024) internal successors, (120), 86 states have internal predecessors, (120), 44 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-12 02:14:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 208 transitions. [2023-11-12 02:14:25,533 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 208 transitions. Word has length 152 [2023-11-12 02:14:25,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:25,535 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 208 transitions. [2023-11-12 02:14:25,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:14:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 208 transitions. [2023-11-12 02:14:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-12 02:14:25,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:25,544 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:25,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:25,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:14:25,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:25,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:25,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1952998524, now seen corresponding path program 1 times [2023-11-12 02:14:25,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:25,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362382972] [2023-11-12 02:14:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:25,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:25,940 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:25,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519704105] [2023-11-12 02:14:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:25,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:25,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:25,950 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:25,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:14:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:26,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:14:26,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:14:26,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:26,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:26,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362382972] [2023-11-12 02:14:26,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:26,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519704105] [2023-11-12 02:14:26,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519704105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:26,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:26,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:14:26,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350469268] [2023-11-12 02:14:26,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:26,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:26,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:26,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:26,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:26,236 INFO L87 Difference]: Start difference. First operand 133 states and 208 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:14:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:26,326 INFO L93 Difference]: Finished difference Result 277 states and 432 transitions. [2023-11-12 02:14:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:26,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 153 [2023-11-12 02:14:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:26,336 INFO L225 Difference]: With dead ends: 277 [2023-11-12 02:14:26,337 INFO L226 Difference]: Without dead ends: 200 [2023-11-12 02:14:26,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:26,344 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 95 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:26,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 322 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-12 02:14:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 142. [2023-11-12 02:14:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 95 states have (on average 1.3894736842105264) internal successors, (132), 95 states have internal predecessors, (132), 44 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-12 02:14:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 220 transitions. [2023-11-12 02:14:26,399 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 220 transitions. Word has length 153 [2023-11-12 02:14:26,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:26,402 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 220 transitions. [2023-11-12 02:14:26,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:14:26,402 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 220 transitions. [2023-11-12 02:14:26,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-12 02:14:26,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:26,408 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:26,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:26,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:26,616 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:26,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:26,616 INFO L85 PathProgramCache]: Analyzing trace with hash -41146182, now seen corresponding path program 1 times [2023-11-12 02:14:26,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:26,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005264703] [2023-11-12 02:14:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:26,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:26,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:26,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389429688] [2023-11-12 02:14:26,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:26,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:26,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:26,718 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:26,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:14:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:26,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:14:26,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:14:26,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:26,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:26,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005264703] [2023-11-12 02:14:26,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:26,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389429688] [2023-11-12 02:14:26,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389429688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:26,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:26,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:26,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956713624] [2023-11-12 02:14:26,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:26,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:26,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:26,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:26,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:14:26,960 INFO L87 Difference]: Start difference. First operand 142 states and 220 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:14:27,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:27,058 INFO L93 Difference]: Finished difference Result 294 states and 455 transitions. [2023-11-12 02:14:27,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:14:27,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 153 [2023-11-12 02:14:27,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:27,062 INFO L225 Difference]: With dead ends: 294 [2023-11-12 02:14:27,062 INFO L226 Difference]: Without dead ends: 209 [2023-11-12 02:14:27,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:27,066 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 99 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:27,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 365 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:27,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-12 02:14:27,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 156. [2023-11-12 02:14:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 109 states have (on average 1.3761467889908257) internal successors, (150), 109 states have internal predecessors, (150), 44 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-12 02:14:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 238 transitions. [2023-11-12 02:14:27,114 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 238 transitions. Word has length 153 [2023-11-12 02:14:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:27,117 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 238 transitions. [2023-11-12 02:14:27,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:14:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 238 transitions. [2023-11-12 02:14:27,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-12 02:14:27,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:27,121 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:27,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:27,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:27,328 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:27,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:27,329 INFO L85 PathProgramCache]: Analyzing trace with hash 96402968, now seen corresponding path program 1 times [2023-11-12 02:14:27,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:27,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266688445] [2023-11-12 02:14:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:27,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:27,405 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:27,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705042590] [2023-11-12 02:14:27,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:27,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:27,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:27,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:27,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:14:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:27,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:14:27,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:14:27,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:27,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:27,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266688445] [2023-11-12 02:14:27,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:27,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705042590] [2023-11-12 02:14:27,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705042590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:27,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:27,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:14:27,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462510835] [2023-11-12 02:14:27,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:27,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:27,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:27,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:27,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:27,839 INFO L87 Difference]: Start difference. First operand 156 states and 238 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:14:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:27,920 INFO L93 Difference]: Finished difference Result 362 states and 554 transitions. [2023-11-12 02:14:27,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:27,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 154 [2023-11-12 02:14:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:27,925 INFO L225 Difference]: With dead ends: 362 [2023-11-12 02:14:27,926 INFO L226 Difference]: Without dead ends: 254 [2023-11-12 02:14:27,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:27,929 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 56 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:27,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 229 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-11-12 02:14:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 251. [2023-11-12 02:14:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 181 states have (on average 1.3922651933701657) internal successors, (252), 181 states have internal predecessors, (252), 66 states have call successors, (66), 3 states have call predecessors, (66), 3 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-12 02:14:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 384 transitions. [2023-11-12 02:14:27,968 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 384 transitions. Word has length 154 [2023-11-12 02:14:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:27,969 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 384 transitions. [2023-11-12 02:14:27,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:14:27,969 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 384 transitions. [2023-11-12 02:14:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-12 02:14:27,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:27,973 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:27,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:28,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:28,182 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:28,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:28,183 INFO L85 PathProgramCache]: Analyzing trace with hash -37610538, now seen corresponding path program 1 times [2023-11-12 02:14:28,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:28,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383774585] [2023-11-12 02:14:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:28,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:28,221 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:28,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645381676] [2023-11-12 02:14:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:28,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:28,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:28,223 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:28,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:14:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:28,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:14:28,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 507 proven. 84 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-11-12 02:14:29,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 36 proven. 87 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2023-11-12 02:14:29,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:29,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383774585] [2023-11-12 02:14:29,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:29,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645381676] [2023-11-12 02:14:29,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645381676] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:29,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:14:29,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-11-12 02:14:29,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451692226] [2023-11-12 02:14:29,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:29,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:14:29,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:29,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:14:29,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:14:29,771 INFO L87 Difference]: Start difference. First operand 251 states and 384 transitions. Second operand has 19 states, 18 states have (on average 4.833333333333333) internal successors, (87), 19 states have internal predecessors, (87), 6 states have call successors, (43), 4 states have call predecessors, (43), 8 states have return successors, (44), 5 states have call predecessors, (44), 6 states have call successors, (44) [2023-11-12 02:14:31,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:31,302 INFO L93 Difference]: Finished difference Result 700 states and 1008 transitions. [2023-11-12 02:14:31,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-12 02:14:31,303 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.833333333333333) internal successors, (87), 19 states have internal predecessors, (87), 6 states have call successors, (43), 4 states have call predecessors, (43), 8 states have return successors, (44), 5 states have call predecessors, (44), 6 states have call successors, (44) Word has length 154 [2023-11-12 02:14:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:31,307 INFO L225 Difference]: With dead ends: 700 [2023-11-12 02:14:31,307 INFO L226 Difference]: Without dead ends: 507 [2023-11-12 02:14:31,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=563, Invalid=1417, Unknown=0, NotChecked=0, Total=1980 [2023-11-12 02:14:31,310 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 763 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:31,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 421 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:14:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-11-12 02:14:31,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 314. [2023-11-12 02:14:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 235 states have (on average 1.353191489361702) internal successors, (318), 235 states have internal predecessors, (318), 66 states have call successors, (66), 12 states have call predecessors, (66), 12 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-12 02:14:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 450 transitions. [2023-11-12 02:14:31,374 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 450 transitions. Word has length 154 [2023-11-12 02:14:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:31,375 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 450 transitions. [2023-11-12 02:14:31,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.833333333333333) internal successors, (87), 19 states have internal predecessors, (87), 6 states have call successors, (43), 4 states have call predecessors, (43), 8 states have return successors, (44), 5 states have call predecessors, (44), 6 states have call successors, (44) [2023-11-12 02:14:31,375 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 450 transitions. [2023-11-12 02:14:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-12 02:14:31,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:31,379 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:31,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:31,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:31,586 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:31,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:31,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1058678892, now seen corresponding path program 1 times [2023-11-12 02:14:31,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:31,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329299583] [2023-11-12 02:14:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:31,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:31,641 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:31,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492251711] [2023-11-12 02:14:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:31,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:31,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:31,649 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:31,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:14:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:32,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 02:14:32,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 21 proven. 63 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-12 02:14:32,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-11-12 02:14:34,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:34,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329299583] [2023-11-12 02:14:34,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:34,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492251711] [2023-11-12 02:14:34,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492251711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:34,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:14:34,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 14 [2023-11-12 02:14:34,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032770232] [2023-11-12 02:14:34,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:34,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:14:34,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:34,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:14:34,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:14:34,484 INFO L87 Difference]: Start difference. First operand 314 states and 450 transitions. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 4 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (44), 2 states have call predecessors, (44), 4 states have call successors, (44) [2023-11-12 02:14:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:35,806 INFO L93 Difference]: Finished difference Result 752 states and 1084 transitions. [2023-11-12 02:14:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:14:35,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 4 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (44), 2 states have call predecessors, (44), 4 states have call successors, (44) Word has length 154 [2023-11-12 02:14:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:35,811 INFO L225 Difference]: With dead ends: 752 [2023-11-12 02:14:35,811 INFO L226 Difference]: Without dead ends: 497 [2023-11-12 02:14:35,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:14:35,813 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 304 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:35,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 476 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:14:35,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2023-11-12 02:14:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 374. [2023-11-12 02:14:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 295 states have (on average 1.3627118644067797) internal successors, (402), 295 states have internal predecessors, (402), 66 states have call successors, (66), 12 states have call predecessors, (66), 12 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-12 02:14:35,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 534 transitions. [2023-11-12 02:14:35,882 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 534 transitions. Word has length 154 [2023-11-12 02:14:35,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:35,882 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 534 transitions. [2023-11-12 02:14:35,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 4 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (44), 2 states have call predecessors, (44), 4 states have call successors, (44) [2023-11-12 02:14:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 534 transitions. [2023-11-12 02:14:35,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-12 02:14:35,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:35,886 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:35,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:36,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:36,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:36,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:36,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1188562768, now seen corresponding path program 1 times [2023-11-12 02:14:36,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:36,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495635516] [2023-11-12 02:14:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:36,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:36,132 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:36,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027364696] [2023-11-12 02:14:36,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:36,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:36,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:36,134 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:36,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:14:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:36,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:14:36,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 464 proven. 81 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-11-12 02:14:36,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 39 proven. 84 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2023-11-12 02:14:37,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:37,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495635516] [2023-11-12 02:14:37,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:37,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027364696] [2023-11-12 02:14:37,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027364696] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:37,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:14:37,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2023-11-12 02:14:37,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831010478] [2023-11-12 02:14:37,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:37,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:14:37,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:37,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:14:37,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:14:37,125 INFO L87 Difference]: Start difference. First operand 374 states and 534 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 3 states have call successors, (37), 3 states have call predecessors, (37), 7 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2023-11-12 02:14:37,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:37,971 INFO L93 Difference]: Finished difference Result 632 states and 889 transitions. [2023-11-12 02:14:37,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 02:14:37,972 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 3 states have call successors, (37), 3 states have call predecessors, (37), 7 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 155 [2023-11-12 02:14:37,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:37,977 INFO L225 Difference]: With dead ends: 632 [2023-11-12 02:14:37,978 INFO L226 Difference]: Without dead ends: 374 [2023-11-12 02:14:37,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2023-11-12 02:14:37,980 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 151 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:37,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 519 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:14:37,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-12 02:14:38,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 348. [2023-11-12 02:14:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 263 states have (on average 1.311787072243346) internal successors, (345), 263 states have internal predecessors, (345), 66 states have call successors, (66), 18 states have call predecessors, (66), 18 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-12 02:14:38,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 477 transitions. [2023-11-12 02:14:38,053 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 477 transitions. Word has length 155 [2023-11-12 02:14:38,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:38,057 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 477 transitions. [2023-11-12 02:14:38,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 3 states have call successors, (37), 3 states have call predecessors, (37), 7 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2023-11-12 02:14:38,057 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 477 transitions. [2023-11-12 02:14:38,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-12 02:14:38,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:38,060 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:38,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:38,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:14:38,268 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:38,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:38,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1307755497, now seen corresponding path program 1 times [2023-11-12 02:14:38,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:38,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039106565] [2023-11-12 02:14:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:38,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:38,304 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:38,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43862341] [2023-11-12 02:14:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:38,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:38,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:38,306 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:38,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:14:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:38,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:14:38,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:38,639 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 480 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2023-11-12 02:14:38,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:38,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:38,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039106565] [2023-11-12 02:14:38,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:38,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43862341] [2023-11-12 02:14:38,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43862341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:38,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:38,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:14:38,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733347297] [2023-11-12 02:14:38,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:38,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:14:38,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:38,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:14:38,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:38,643 INFO L87 Difference]: Start difference. First operand 348 states and 477 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 02:14:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:39,118 INFO L93 Difference]: Finished difference Result 759 states and 1046 transitions. [2023-11-12 02:14:39,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:39,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 155 [2023-11-12 02:14:39,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:39,123 INFO L225 Difference]: With dead ends: 759 [2023-11-12 02:14:39,123 INFO L226 Difference]: Without dead ends: 537 [2023-11-12 02:14:39,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:39,125 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 301 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:39,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 284 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:14:39,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-11-12 02:14:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 533. [2023-11-12 02:14:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 392 states have (on average 1.3035714285714286) internal successors, (511), 392 states have internal predecessors, (511), 110 states have call successors, (110), 30 states have call predecessors, (110), 30 states have return successors, (110), 110 states have call predecessors, (110), 110 states have call successors, (110) [2023-11-12 02:14:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 731 transitions. [2023-11-12 02:14:39,235 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 731 transitions. Word has length 155 [2023-11-12 02:14:39,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:39,235 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 731 transitions. [2023-11-12 02:14:39,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 02:14:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 731 transitions. [2023-11-12 02:14:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-12 02:14:39,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:39,238 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:39,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:39,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:39,455 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:39,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:39,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1966143445, now seen corresponding path program 1 times [2023-11-12 02:14:39,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:39,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904222574] [2023-11-12 02:14:39,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:39,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:39,492 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:39,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831540575] [2023-11-12 02:14:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:39,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:39,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:39,494 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:39,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:14:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:39,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:14:39,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:14:40,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:40,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:40,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904222574] [2023-11-12 02:14:40,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:40,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831540575] [2023-11-12 02:14:40,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831540575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:40,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:40,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:40,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852154950] [2023-11-12 02:14:40,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:40,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:14:40,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:40,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:14:40,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:40,159 INFO L87 Difference]: Start difference. First operand 533 states and 731 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:14:40,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:40,520 INFO L93 Difference]: Finished difference Result 977 states and 1349 transitions. [2023-11-12 02:14:40,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:40,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 155 [2023-11-12 02:14:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:40,525 INFO L225 Difference]: With dead ends: 977 [2023-11-12 02:14:40,525 INFO L226 Difference]: Without dead ends: 570 [2023-11-12 02:14:40,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:40,528 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 48 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:40,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 325 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:14:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2023-11-12 02:14:40,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 558. [2023-11-12 02:14:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 417 states have (on average 1.3069544364508394) internal successors, (545), 417 states have internal predecessors, (545), 110 states have call successors, (110), 30 states have call predecessors, (110), 30 states have return successors, (110), 110 states have call predecessors, (110), 110 states have call successors, (110) [2023-11-12 02:14:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 765 transitions. [2023-11-12 02:14:40,638 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 765 transitions. Word has length 155 [2023-11-12 02:14:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:40,638 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 765 transitions. [2023-11-12 02:14:40,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:14:40,639 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 765 transitions. [2023-11-12 02:14:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-12 02:14:40,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:40,641 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:40,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:40,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 02:14:40,849 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:40,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:40,849 INFO L85 PathProgramCache]: Analyzing trace with hash -939701867, now seen corresponding path program 1 times [2023-11-12 02:14:40,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:40,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131516109] [2023-11-12 02:14:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:40,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:40,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:40,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97154741] [2023-11-12 02:14:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:40,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:40,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:40,877 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:40,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c14c524-3ac6-4097-927e-c1e5c67803bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:14:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:41,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-12 02:14:41,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 422 proven. 135 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2023-11-12 02:14:42,408 INFO L327 TraceCheckSpWp]: Computing backward predicates...