./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-71.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/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_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-71.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/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_b3c1b55e-31d6-472c-8f58-d5559d78bb84/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 ef425419d893cdf8f2db575b031c5b203ea887f7ed28e92ca0beafffac1fc1ee --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:04:40,868 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:04:40,955 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:04:40,961 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:04:40,962 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:04:40,992 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:04:40,993 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:04:40,994 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:04:40,995 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:04:40,996 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:04:40,997 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:04:40,998 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:04:40,999 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:04:41,000 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:04:41,001 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:04:41,002 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:04:41,002 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:04:41,003 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:04:41,004 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:04:41,005 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:04:41,006 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:04:41,007 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:04:41,007 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:04:41,008 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:04:41,009 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:04:41,010 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:04:41,011 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:04:41,011 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:04:41,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:04:41,013 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:04:41,013 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:04:41,014 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:04:41,015 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:04:41,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:04:41,016 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:04:41,016 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:04:41,017 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:04:41,018 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:04:41,018 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:04:41,019 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_b3c1b55e-31d6-472c-8f58-d5559d78bb84/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef425419d893cdf8f2db575b031c5b203ea887f7ed28e92ca0beafffac1fc1ee [2023-11-12 02:04:41,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:04:41,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:04:41,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:04:41,392 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:04:41,393 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:04:41,395 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-71.i [2023-11-12 02:04:44,517 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:04:44,862 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:04:44,868 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-71.i [2023-11-12 02:04:44,888 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/data/ecd791981/a420e839731444ab8a0683ea3d9c6d53/FLAG5d17d6c4e [2023-11-12 02:04:44,906 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/data/ecd791981/a420e839731444ab8a0683ea3d9c6d53 [2023-11-12 02:04:44,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:04:44,917 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:04:44,920 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:04:44,920 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:04:44,925 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:04:44,928 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:04:44" (1/1) ... [2023-11-12 02:04:44,930 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434e2437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:44, skipping insertion in model container [2023-11-12 02:04:44,930 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:04:44" (1/1) ... [2023-11-12 02:04:45,000 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:04:45,209 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_b3c1b55e-31d6-472c-8f58-d5559d78bb84/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-71.i[916,929] [2023-11-12 02:04:45,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:04:45,488 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:04:45,507 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_b3c1b55e-31d6-472c-8f58-d5559d78bb84/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-71.i[916,929] [2023-11-12 02:04:45,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:04:45,687 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:04:45,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:45 WrapperNode [2023-11-12 02:04:45,688 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:04:45,689 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:04:45,690 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:04:45,690 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:04:45,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:45" (1/1) ... [2023-11-12 02:04:45,730 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:45" (1/1) ... [2023-11-12 02:04:45,885 INFO L138 Inliner]: procedures = 26, calls = 110, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 772 [2023-11-12 02:04:45,886 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:04:45,886 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:04:45,887 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:04:45,887 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:04:45,897 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:45" (1/1) ... [2023-11-12 02:04:45,897 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:45" (1/1) ... [2023-11-12 02:04:45,908 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:45" (1/1) ... [2023-11-12 02:04:45,909 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:45" (1/1) ... [2023-11-12 02:04:45,942 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:45" (1/1) ... [2023-11-12 02:04:45,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:45" (1/1) ... [2023-11-12 02:04:45,959 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:45" (1/1) ... [2023-11-12 02:04:45,968 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:45" (1/1) ... [2023-11-12 02:04:45,999 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:04:46,003 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:04:46,003 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:04:46,004 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:04:46,004 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:45" (1/1) ... [2023-11-12 02:04:46,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:04:46,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:46,045 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:04:46,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:04:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:04:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:04:46,087 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:04:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:04:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:04:46,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:04:46,276 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:04:46,279 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:04:47,674 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:04:47,696 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:04:47,697 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:04:47,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:04:47 BoogieIcfgContainer [2023-11-12 02:04:47,703 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:04:47,709 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:04:47,709 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:04:47,713 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:04:47,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:04:44" (1/3) ... [2023-11-12 02:04:47,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50db0441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:04:47, skipping insertion in model container [2023-11-12 02:04:47,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:45" (2/3) ... [2023-11-12 02:04:47,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50db0441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:04:47, skipping insertion in model container [2023-11-12 02:04:47,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:04:47" (3/3) ... [2023-11-12 02:04:47,718 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-71.i [2023-11-12 02:04:47,747 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:04:47,748 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:04:47,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:04:47,857 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;@56b2b601, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:04:47,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:04:47,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 308 states, 208 states have (on average 1.6346153846153846) internal successors, (340), 209 states have internal predecessors, (340), 97 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2023-11-12 02:04:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2023-11-12 02:04:47,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:47,925 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:47,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:47,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:47,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1028428869, now seen corresponding path program 1 times [2023-11-12 02:04:47,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:47,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959337249] [2023-11-12 02:04:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:47,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:48,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:48,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959337249] [2023-11-12 02:04:48,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:04:48,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536949616] [2023-11-12 02:04:48,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:48,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:48,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:48,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:48,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:04:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:49,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:04:49,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 18432 trivial. 0 not checked. [2023-11-12 02:04:49,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:49,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536949616] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:49,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:49,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:04:49,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574694283] [2023-11-12 02:04:49,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:49,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:04:49,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:49,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:04:49,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:04:49,281 INFO L87 Difference]: Start difference. First operand has 308 states, 208 states have (on average 1.6346153846153846) internal successors, (340), 209 states have internal predecessors, (340), 97 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (97), 2 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 2 states have call successors, (97) [2023-11-12 02:04:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:04:49,353 INFO L93 Difference]: Finished difference Result 609 states and 1159 transitions. [2023-11-12 02:04:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:04:49,356 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (97), 2 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 2 states have call successors, (97) Word has length 616 [2023-11-12 02:04:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:04:49,369 INFO L225 Difference]: With dead ends: 609 [2023-11-12 02:04:49,369 INFO L226 Difference]: Without dead ends: 304 [2023-11-12 02:04:49,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:04:49,380 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:04:49,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:04:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-12 02:04:49,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2023-11-12 02:04:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 205 states have (on average 1.6146341463414635) internal successors, (331), 205 states have internal predecessors, (331), 97 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2023-11-12 02:04:49,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 525 transitions. [2023-11-12 02:04:49,523 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 525 transitions. Word has length 616 [2023-11-12 02:04:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:04:49,526 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 525 transitions. [2023-11-12 02:04:49,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (97), 2 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 2 states have call successors, (97) [2023-11-12 02:04:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 525 transitions. [2023-11-12 02:04:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2023-11-12 02:04:49,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:49,554 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:49,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:49,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:04:49,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:49,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:49,763 INFO L85 PathProgramCache]: Analyzing trace with hash -708727663, now seen corresponding path program 1 times [2023-11-12 02:04:49,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:49,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263429575] [2023-11-12 02:04:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:49,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:49,924 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:49,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737168276] [2023-11-12 02:04:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:49,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:49,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:49,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:49,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:04:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:50,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:04:50,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-12 02:04:51,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:51,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:51,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263429575] [2023-11-12 02:04:51,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:04:51,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737168276] [2023-11-12 02:04:51,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737168276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:51,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:51,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:04:51,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471868289] [2023-11-12 02:04:51,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:51,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:04:51,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:51,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:04:51,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:04:51,497 INFO L87 Difference]: Start difference. First operand 304 states and 525 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:04:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:04:52,644 INFO L93 Difference]: Finished difference Result 2150 states and 3693 transitions. [2023-11-12 02:04:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:04:52,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 616 [2023-11-12 02:04:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:04:52,665 INFO L225 Difference]: With dead ends: 2150 [2023-11-12 02:04:52,665 INFO L226 Difference]: Without dead ends: 1849 [2023-11-12 02:04:52,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:04:52,669 INFO L413 NwaCegarLoop]: 991 mSDtfsCounter, 1852 mSDsluCounter, 3212 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1852 SdHoareTripleChecker+Valid, 4203 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:04:52,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1852 Valid, 4203 Invalid, 500 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [306 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:04:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2023-11-12 02:04:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1831. [2023-11-12 02:04:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1218 states have (on average 1.6001642036124795) internal successors, (1949), 1222 states have internal predecessors, (1949), 604 states have call successors, (604), 8 states have call predecessors, (604), 8 states have return successors, (604), 600 states have call predecessors, (604), 604 states have call successors, (604) [2023-11-12 02:04:53,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 3157 transitions. [2023-11-12 02:04:53,108 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 3157 transitions. Word has length 616 [2023-11-12 02:04:53,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:04:53,111 INFO L495 AbstractCegarLoop]: Abstraction has 1831 states and 3157 transitions. [2023-11-12 02:04:53,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:04:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 3157 transitions. [2023-11-12 02:04:53,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2023-11-12 02:04:53,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:53,120 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:53,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:53,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 02:04:53,334 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:53,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:53,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1536851791, now seen corresponding path program 1 times [2023-11-12 02:04:53,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:53,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061588497] [2023-11-12 02:04:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:53,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:53,484 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:53,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819140257] [2023-11-12 02:04:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:53,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:53,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:53,490 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:53,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:04:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:53,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:04:53,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-12 02:04:54,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:54,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:54,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061588497] [2023-11-12 02:04:54,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:04:54,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819140257] [2023-11-12 02:04:54,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819140257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:54,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:54,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:04:54,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332080843] [2023-11-12 02:04:54,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:54,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:04:54,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:54,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:04:54,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:04:54,837 INFO L87 Difference]: Start difference. First operand 1831 states and 3157 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:04:55,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:04:55,012 INFO L93 Difference]: Finished difference Result 4574 states and 7890 transitions. [2023-11-12 02:04:55,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:04:55,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 616 [2023-11-12 02:04:55,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:04:55,081 INFO L225 Difference]: With dead ends: 4574 [2023-11-12 02:04:55,081 INFO L226 Difference]: Without dead ends: 2746 [2023-11-12 02:04:55,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 614 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 02:04:55,089 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 238 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:04:55,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1176 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:04:55,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2023-11-12 02:04:55,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1831. [2023-11-12 02:04:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1218 states have (on average 1.6001642036124795) internal successors, (1949), 1222 states have internal predecessors, (1949), 604 states have call successors, (604), 8 states have call predecessors, (604), 8 states have return successors, (604), 600 states have call predecessors, (604), 604 states have call successors, (604) [2023-11-12 02:04:55,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 3157 transitions. [2023-11-12 02:04:55,551 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 3157 transitions. Word has length 616 [2023-11-12 02:04:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:04:55,553 INFO L495 AbstractCegarLoop]: Abstraction has 1831 states and 3157 transitions. [2023-11-12 02:04:55,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:04:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 3157 transitions. [2023-11-12 02:04:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2023-11-12 02:04:55,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:55,565 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:55,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:55,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:55,773 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:55,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:55,774 INFO L85 PathProgramCache]: Analyzing trace with hash -264826989, now seen corresponding path program 1 times [2023-11-12 02:04:55,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:55,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147934995] [2023-11-12 02:04:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:55,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:55,890 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:55,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831852266] [2023-11-12 02:04:55,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:55,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:55,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:55,893 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:55,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:04:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:56,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:04:56,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-12 02:04:56,477 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:56,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:56,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147934995] [2023-11-12 02:04:56,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:04:56,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831852266] [2023-11-12 02:04:56,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831852266] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:56,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:56,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:04:56,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047469471] [2023-11-12 02:04:56,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:56,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:04:56,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:56,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:04:56,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:04:56,482 INFO L87 Difference]: Start difference. First operand 1831 states and 3157 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:04:56,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:04:56,782 INFO L93 Difference]: Finished difference Result 5081 states and 8769 transitions. [2023-11-12 02:04:56,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:04:56,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 616 [2023-11-12 02:04:56,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:04:56,809 INFO L225 Difference]: With dead ends: 5081 [2023-11-12 02:04:56,810 INFO L226 Difference]: Without dead ends: 3253 [2023-11-12 02:04:56,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 614 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 02:04:56,820 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 308 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:04:56,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1151 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:04:56,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3253 states. [2023-11-12 02:04:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3253 to 3243. [2023-11-12 02:04:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3243 states, 2222 states have (on average 1.6084608460846084) internal successors, (3574), 2234 states have internal predecessors, (3574), 1004 states have call successors, (1004), 16 states have call predecessors, (1004), 16 states have return successors, (1004), 992 states have call predecessors, (1004), 1004 states have call successors, (1004) [2023-11-12 02:04:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3243 states to 3243 states and 5582 transitions. [2023-11-12 02:04:57,342 INFO L78 Accepts]: Start accepts. Automaton has 3243 states and 5582 transitions. Word has length 616 [2023-11-12 02:04:57,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:04:57,344 INFO L495 AbstractCegarLoop]: Abstraction has 3243 states and 5582 transitions. [2023-11-12 02:04:57,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:04:57,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3243 states and 5582 transitions. [2023-11-12 02:04:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2023-11-12 02:04:57,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:57,354 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:57,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:57,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:57,563 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:57,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:57,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1323520913, now seen corresponding path program 1 times [2023-11-12 02:04:57,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:57,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285335507] [2023-11-12 02:04:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:57,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:57,663 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:57,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915629915] [2023-11-12 02:04:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:57,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:57,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:57,665 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:57,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:04:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:58,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:04:58,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-12 02:04:58,940 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:58,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:58,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285335507] [2023-11-12 02:04:58,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:04:58,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915629915] [2023-11-12 02:04:58,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915629915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:58,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:58,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:04:58,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508406574] [2023-11-12 02:04:58,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:58,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:04:58,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:58,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:04:58,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:04:58,951 INFO L87 Difference]: Start difference. First operand 3243 states and 5582 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:04:59,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:04:59,225 INFO L93 Difference]: Finished difference Result 6485 states and 11162 transitions. [2023-11-12 02:04:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:04:59,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 616 [2023-11-12 02:04:59,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:04:59,252 INFO L225 Difference]: With dead ends: 6485 [2023-11-12 02:04:59,252 INFO L226 Difference]: Without dead ends: 3245 [2023-11-12 02:04:59,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 614 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 02:04:59,265 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 259 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:04:59,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 1027 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:04:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2023-11-12 02:04:59,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 3243. [2023-11-12 02:04:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3243 states, 2222 states have (on average 1.6066606660666067) internal successors, (3570), 2234 states have internal predecessors, (3570), 1004 states have call successors, (1004), 16 states have call predecessors, (1004), 16 states have return successors, (1004), 992 states have call predecessors, (1004), 1004 states have call successors, (1004) [2023-11-12 02:04:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3243 states to 3243 states and 5578 transitions. [2023-11-12 02:04:59,814 INFO L78 Accepts]: Start accepts. Automaton has 3243 states and 5578 transitions. Word has length 616 [2023-11-12 02:04:59,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:04:59,815 INFO L495 AbstractCegarLoop]: Abstraction has 3243 states and 5578 transitions. [2023-11-12 02:04:59,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:04:59,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3243 states and 5578 transitions. [2023-11-12 02:04:59,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2023-11-12 02:04:59,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:59,826 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:59,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:00,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:00,035 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:05:00,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:00,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1516682873, now seen corresponding path program 1 times [2023-11-12 02:05:00,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:00,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669266717] [2023-11-12 02:05:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:00,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:00,133 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:05:00,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541213620] [2023-11-12 02:05:00,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:00,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:00,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:00,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:00,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:05:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:00,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:05:00,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 8946 proven. 111 refuted. 0 times theorem prover too weak. 9567 trivial. 0 not checked. [2023-11-12 02:05:01,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 177 proven. 111 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2023-11-12 02:05:01,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:01,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669266717] [2023-11-12 02:05:01,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:05:01,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541213620] [2023-11-12 02:05:01,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541213620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:01,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:05:01,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:05:01,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850185672] [2023-11-12 02:05:01,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:01,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:05:01,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:01,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:05:01,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:05:01,574 INFO L87 Difference]: Start difference. First operand 3243 states and 5578 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 2 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 2 states have call predecessors, (135), 2 states have call successors, (135) [2023-11-12 02:05:02,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:05:02,529 INFO L93 Difference]: Finished difference Result 6531 states and 11197 transitions. [2023-11-12 02:05:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:05:02,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 2 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 2 states have call predecessors, (135), 2 states have call successors, (135) Word has length 617 [2023-11-12 02:05:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:05:02,562 INFO L225 Difference]: With dead ends: 6531 [2023-11-12 02:05:02,563 INFO L226 Difference]: Without dead ends: 3291 [2023-11-12 02:05:02,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1236 GetRequests, 1226 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:05:02,576 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 827 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:05:02,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1048 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:05:02,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2023-11-12 02:05:03,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 3259. [2023-11-12 02:05:03,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 2234 states have (on average 1.5890778871978515) internal successors, (3550), 2246 states have internal predecessors, (3550), 1004 states have call successors, (1004), 20 states have call predecessors, (1004), 20 states have return successors, (1004), 992 states have call predecessors, (1004), 1004 states have call successors, (1004) [2023-11-12 02:05:03,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 5558 transitions. [2023-11-12 02:05:03,089 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 5558 transitions. Word has length 617 [2023-11-12 02:05:03,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:05:03,090 INFO L495 AbstractCegarLoop]: Abstraction has 3259 states and 5558 transitions. [2023-11-12 02:05:03,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 2 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 2 states have call predecessors, (135), 2 states have call successors, (135) [2023-11-12 02:05:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 5558 transitions. [2023-11-12 02:05:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2023-11-12 02:05:03,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:05:03,101 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:03,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:03,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:03,309 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:05:03,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:03,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1277172115, now seen corresponding path program 1 times [2023-11-12 02:05:03,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:03,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076865335] [2023-11-12 02:05:03,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:03,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:03,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:05:03,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025379860] [2023-11-12 02:05:03,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:03,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:03,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:03,409 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:03,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:05:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:03,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:05:03,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-12 02:05:03,966 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:05:03,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:03,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076865335] [2023-11-12 02:05:03,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:05:03,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025379860] [2023-11-12 02:05:03,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025379860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:03,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:03,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:05:03,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822720592] [2023-11-12 02:05:03,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:03,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:05:03,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:03,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:05:03,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:05:03,971 INFO L87 Difference]: Start difference. First operand 3259 states and 5558 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:05:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:05:04,440 INFO L93 Difference]: Finished difference Result 9771 states and 16668 transitions. [2023-11-12 02:05:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:05:04,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 618 [2023-11-12 02:05:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:05:04,502 INFO L225 Difference]: With dead ends: 9771 [2023-11-12 02:05:04,502 INFO L226 Difference]: Without dead ends: 6515 [2023-11-12 02:05:04,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 616 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 02:05:04,518 INFO L413 NwaCegarLoop]: 1035 mSDtfsCounter, 515 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:05:04,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1551 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:05:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6515 states. [2023-11-12 02:05:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6515 to 6513. [2023-11-12 02:05:05,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6513 states, 4464 states have (on average 1.586021505376344) internal successors, (7080), 4488 states have internal predecessors, (7080), 2008 states have call successors, (2008), 40 states have call predecessors, (2008), 40 states have return successors, (2008), 1984 states have call predecessors, (2008), 2008 states have call successors, (2008) [2023-11-12 02:05:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6513 states to 6513 states and 11096 transitions. [2023-11-12 02:05:05,650 INFO L78 Accepts]: Start accepts. Automaton has 6513 states and 11096 transitions. Word has length 618 [2023-11-12 02:05:05,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:05:05,652 INFO L495 AbstractCegarLoop]: Abstraction has 6513 states and 11096 transitions. [2023-11-12 02:05:05,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:05:05,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6513 states and 11096 transitions. [2023-11-12 02:05:05,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2023-11-12 02:05:05,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:05:05,662 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:05,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:05,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:05,872 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:05:05,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:05,872 INFO L85 PathProgramCache]: Analyzing trace with hash 646055919, now seen corresponding path program 1 times [2023-11-12 02:05:05,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:05,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116771147] [2023-11-12 02:05:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:05,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:05,960 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:05:05,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047235400] [2023-11-12 02:05:05,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:05,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:05,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:05,965 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:05,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:05:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:06,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:05:06,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-12 02:05:06,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:05:06,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116771147] [2023-11-12 02:05:06,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:05:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047235400] [2023-11-12 02:05:06,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047235400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:06,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:06,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:05:06,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12058838] [2023-11-12 02:05:06,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:06,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:05:06,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:06,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:05:06,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:05:06,550 INFO L87 Difference]: Start difference. First operand 6513 states and 11096 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:05:07,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:05:07,399 INFO L93 Difference]: Finished difference Result 13819 states and 23627 transitions. [2023-11-12 02:05:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:05:07,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 618 [2023-11-12 02:05:07,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:05:07,441 INFO L225 Difference]: With dead ends: 13819 [2023-11-12 02:05:07,441 INFO L226 Difference]: Without dead ends: 6545 [2023-11-12 02:05:07,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 615 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 02:05:07,468 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 382 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:05:07,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1170 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:05:07,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6545 states. [2023-11-12 02:05:08,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6545 to 6545. [2023-11-12 02:05:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6545 states, 4488 states have (on average 1.5730837789661318) internal successors, (7060), 4512 states have internal predecessors, (7060), 2008 states have call successors, (2008), 48 states have call predecessors, (2008), 48 states have return successors, (2008), 1984 states have call predecessors, (2008), 2008 states have call successors, (2008) [2023-11-12 02:05:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6545 states to 6545 states and 11076 transitions. [2023-11-12 02:05:08,598 INFO L78 Accepts]: Start accepts. Automaton has 6545 states and 11076 transitions. Word has length 618 [2023-11-12 02:05:08,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:05:08,599 INFO L495 AbstractCegarLoop]: Abstraction has 6545 states and 11076 transitions. [2023-11-12 02:05:08,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:05:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6545 states and 11076 transitions. [2023-11-12 02:05:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2023-11-12 02:05:08,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:05:08,614 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:08,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-12 02:05:08,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:08,828 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:05:08,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:08,828 INFO L85 PathProgramCache]: Analyzing trace with hash 920815533, now seen corresponding path program 1 times [2023-11-12 02:05:08,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:08,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800436853] [2023-11-12 02:05:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:08,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:08,941 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:05:08,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238314744] [2023-11-12 02:05:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:08,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:08,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:08,944 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:08,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:05:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:09,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:05:09,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-12 02:05:10,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:05:10,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:10,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800436853] [2023-11-12 02:05:10,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:05:10,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238314744] [2023-11-12 02:05:10,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238314744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:10,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:10,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:05:10,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343531733] [2023-11-12 02:05:10,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:10,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:05:10,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:10,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:05:10,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:05:10,403 INFO L87 Difference]: Start difference. First operand 6545 states and 11076 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:05:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:05:12,003 INFO L93 Difference]: Finished difference Result 23119 states and 39157 transitions. [2023-11-12 02:05:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:05:12,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 618 [2023-11-12 02:05:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:05:12,076 INFO L225 Difference]: With dead ends: 23119 [2023-11-12 02:05:12,076 INFO L226 Difference]: Without dead ends: 16577 [2023-11-12 02:05:12,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:05:12,105 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 716 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:05:12,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 1805 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:05:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16577 states. [2023-11-12 02:05:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16577 to 16301. [2023-11-12 02:05:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16301 states, 11160 states have (on average 1.5611111111111111) internal successors, (17422), 11220 states have internal predecessors, (17422), 5020 states have call successors, (5020), 120 states have call predecessors, (5020), 120 states have return successors, (5020), 4960 states have call predecessors, (5020), 5020 states have call successors, (5020) [2023-11-12 02:05:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16301 states to 16301 states and 27462 transitions. [2023-11-12 02:05:15,182 INFO L78 Accepts]: Start accepts. Automaton has 16301 states and 27462 transitions. Word has length 618 [2023-11-12 02:05:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:05:15,183 INFO L495 AbstractCegarLoop]: Abstraction has 16301 states and 27462 transitions. [2023-11-12 02:05:15,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:05:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 16301 states and 27462 transitions. [2023-11-12 02:05:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2023-11-12 02:05:15,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:05:15,206 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:15,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:15,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 02:05:15,415 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:05:15,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:15,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2141158296, now seen corresponding path program 1 times [2023-11-12 02:05:15,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:15,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297529325] [2023-11-12 02:05:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:15,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:15,513 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:05:15,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847916735] [2023-11-12 02:05:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:15,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:15,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:15,516 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:15,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:05:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:16,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:05:16,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18624 trivial. 0 not checked. [2023-11-12 02:05:16,198 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:05:16,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:16,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297529325] [2023-11-12 02:05:16,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:05:16,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847916735] [2023-11-12 02:05:16,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847916735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:16,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:16,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:05:16,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503830984] [2023-11-12 02:05:16,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:16,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:05:16,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:16,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:05:16,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:05:16,204 INFO L87 Difference]: Start difference. First operand 16301 states and 27462 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:05:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:05:18,095 INFO L93 Difference]: Finished difference Result 47853 states and 80388 transitions. [2023-11-12 02:05:18,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:05:18,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) Word has length 619 [2023-11-12 02:05:18,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:05:18,223 INFO L225 Difference]: With dead ends: 47853 [2023-11-12 02:05:18,224 INFO L226 Difference]: Without dead ends: 31555 [2023-11-12 02:05:18,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 617 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 02:05:18,269 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 473 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:05:18,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1021 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:05:18,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31555 states. [2023-11-12 02:05:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31555 to 31473. [2023-11-12 02:05:23,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31473 states, 21192 states have (on average 1.5349188372970932) internal successors, (32528), 21312 states have internal predecessors, (32528), 10040 states have call successors, (10040), 240 states have call predecessors, (10040), 240 states have return successors, (10040), 9920 states have call predecessors, (10040), 10040 states have call successors, (10040) [2023-11-12 02:05:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31473 states to 31473 states and 52608 transitions. [2023-11-12 02:05:23,193 INFO L78 Accepts]: Start accepts. Automaton has 31473 states and 52608 transitions. Word has length 619 [2023-11-12 02:05:23,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:05:23,194 INFO L495 AbstractCegarLoop]: Abstraction has 31473 states and 52608 transitions. [2023-11-12 02:05:23,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (97), 1 states have call predecessors, (97), 1 states have return successors, (97), 1 states have call predecessors, (97), 1 states have call successors, (97) [2023-11-12 02:05:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 31473 states and 52608 transitions. [2023-11-12 02:05:23,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2023-11-12 02:05:23,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:05:23,219 INFO L195 NwaCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:23,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:23,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:05:23,429 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:05:23,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1309803498, now seen corresponding path program 1 times [2023-11-12 02:05:23,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:23,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675684250] [2023-11-12 02:05:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:23,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:23,507 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:05:23,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718137405] [2023-11-12 02:05:23,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:23,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:23,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:23,509 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:23,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c1b55e-31d6-472c-8f58-d5559d78bb84/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:05:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:24,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:05:24,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 9276 proven. 126 refuted. 0 times theorem prover too weak. 9222 trivial. 0 not checked. [2023-11-12 02:05:24,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18624 backedges. 162 proven. 126 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2023-11-12 02:05:25,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:25,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675684250] [2023-11-12 02:05:25,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:05:25,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718137405] [2023-11-12 02:05:25,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718137405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:25,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:05:25,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-12 02:05:25,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86690358] [2023-11-12 02:05:25,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:25,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:05:25,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:25,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:05:25,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:05:25,102 INFO L87 Difference]: Start difference. First operand 31473 states and 52608 transitions. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 3 states have call successors, (139), 2 states have call predecessors, (139), 4 states have return successors, (140), 3 states have call predecessors, (140), 3 states have call successors, (140)