./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-59.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-59.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b8b9ffa0f086760a52bbb5b7ce872ecb50536a94abf6bed664eac71cc82e5722 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:02:02,747 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:02:02,818 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:02:02,824 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:02:02,825 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:02:02,852 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:02:02,853 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:02:02,854 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:02:02,855 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:02:02,855 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:02:02,856 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:02:02,857 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:02:02,858 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:02:02,859 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:02:02,859 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:02:02,860 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:02:02,861 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:02:02,861 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:02:02,862 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:02:02,863 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:02:02,863 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:02:02,864 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:02:02,865 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:02:02,865 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:02:02,866 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:02:02,866 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:02:02,867 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:02:02,867 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:02:02,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:02:02,868 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:02:02,869 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:02:02,892 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:02:02,893 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:02:02,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:02:02,894 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:02:02,894 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:02:02,895 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:02:02,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:02:02,895 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:02:02,896 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_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8b9ffa0f086760a52bbb5b7ce872ecb50536a94abf6bed664eac71cc82e5722 [2023-11-19 08:02:03,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:02:03,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:02:03,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:02:03,240 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:02:03,240 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:02:03,241 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-59.i [2023-11-19 08:02:06,264 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:02:06,582 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:02:06,583 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-59.i [2023-11-19 08:02:06,597 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/data/38d08a574/5edd054473214bcbb5e360c8f4068f8d/FLAGf3c62c24b [2023-11-19 08:02:06,620 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/data/38d08a574/5edd054473214bcbb5e360c8f4068f8d [2023-11-19 08:02:06,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:02:06,630 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:02:06,633 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:02:06,634 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:02:06,639 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:02:06,642 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:06" (1/1) ... [2023-11-19 08:02:06,643 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fef6dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:06, skipping insertion in model container [2023-11-19 08:02:06,644 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:06" (1/1) ... [2023-11-19 08:02:06,706 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:02:06,917 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_fda2a025-2789-4dfe-9918-c1e8242b9c03/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-59.i[915,928] [2023-11-19 08:02:06,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:02:07,013 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:02:07,028 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_fda2a025-2789-4dfe-9918-c1e8242b9c03/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-59.i[915,928] [2023-11-19 08:02:07,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:02:07,093 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:02:07,094 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:07 WrapperNode [2023-11-19 08:02:07,094 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:02:07,096 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:02:07,096 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:02:07,096 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:02:07,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:07" (1/1) ... [2023-11-19 08:02:07,117 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:07" (1/1) ... [2023-11-19 08:02:07,179 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 206 [2023-11-19 08:02:07,180 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:02:07,180 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:02:07,185 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:02:07,185 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:02:07,195 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:07" (1/1) ... [2023-11-19 08:02:07,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:07" (1/1) ... [2023-11-19 08:02:07,200 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:07" (1/1) ... [2023-11-19 08:02:07,205 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:07" (1/1) ... [2023-11-19 08:02:07,232 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:07" (1/1) ... [2023-11-19 08:02:07,236 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:07" (1/1) ... [2023-11-19 08:02:07,240 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:07" (1/1) ... [2023-11-19 08:02:07,253 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:07" (1/1) ... [2023-11-19 08:02:07,261 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:02:07,266 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:02:07,266 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:02:07,266 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:02:07,267 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:07" (1/1) ... [2023-11-19 08:02:07,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:02:07,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:07,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:02:07,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:02:07,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:02:07,397 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 08:02:07,397 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 08:02:07,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:02:07,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:02:07,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:02:07,548 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:02:07,550 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:02:08,056 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:02:08,066 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:02:08,066 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:02:08,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:08 BoogieIcfgContainer [2023-11-19 08:02:08,071 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:02:08,073 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:02:08,074 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:02:08,077 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:02:08,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:02:06" (1/3) ... [2023-11-19 08:02:08,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142b42b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:08, skipping insertion in model container [2023-11-19 08:02:08,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:07" (2/3) ... [2023-11-19 08:02:08,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142b42b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:08, skipping insertion in model container [2023-11-19 08:02:08,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:08" (3/3) ... [2023-11-19 08:02:08,080 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-25_file-59.i [2023-11-19 08:02:08,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:02:08,102 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:02:08,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:02:08,182 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;@2d92e72f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:02:08,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:02:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 56 states have internal predecessors, (79), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-19 08:02:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-19 08:02:08,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:08,213 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:08,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:08,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:08,222 INFO L85 PathProgramCache]: Analyzing trace with hash 215972656, now seen corresponding path program 1 times [2023-11-19 08:02:08,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:08,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718149226] [2023-11-19 08:02:08,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:08,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:08,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:08,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718149226] [2023-11-19 08:02:08,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:02:08,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073977394] [2023-11-19 08:02:08,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:08,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:08,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:08,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:08,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:02:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:08,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:02:08,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2023-11-19 08:02:08,892 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:08,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073977394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:08,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:08,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:02:08,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315029741] [2023-11-19 08:02:08,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:08,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:02:08,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:08,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:02:08,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:02:08,938 INFO L87 Difference]: Start difference. First operand has 85 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 56 states have internal predecessors, (79), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-19 08:02:08,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:08,977 INFO L93 Difference]: Finished difference Result 163 states and 287 transitions. [2023-11-19 08:02:08,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:02:08,979 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 2 states have call successors, (27) Word has length 175 [2023-11-19 08:02:08,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:08,989 INFO L225 Difference]: With dead ends: 163 [2023-11-19 08:02:08,989 INFO L226 Difference]: Without dead ends: 81 [2023-11-19 08:02:08,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:02:08,997 INFO L413 NwaCegarLoop]: 124 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, 124 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:08,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:02:09,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-19 08:02:09,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-19 08:02:09,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 states have internal predecessors, (70), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-19 08:02:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 124 transitions. [2023-11-19 08:02:09,053 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 124 transitions. Word has length 175 [2023-11-19 08:02:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:09,054 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 124 transitions. [2023-11-19 08:02:09,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-19 08:02:09,055 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 124 transitions. [2023-11-19 08:02:09,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-19 08:02:09,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:09,070 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:09,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 08:02:09,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:09,283 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:09,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:09,284 INFO L85 PathProgramCache]: Analyzing trace with hash -488292698, now seen corresponding path program 1 times [2023-11-19 08:02:09,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:09,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760533715] [2023-11-19 08:02:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:09,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:09,438 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:09,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062464044] [2023-11-19 08:02:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:09,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:09,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:09,443 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:09,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:02:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:09,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:02:09,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-19 08:02:09,730 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:09,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:09,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760533715] [2023-11-19 08:02:09,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:09,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062464044] [2023-11-19 08:02:09,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062464044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:09,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:09,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:02:09,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895310647] [2023-11-19 08:02:09,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:09,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:02:09,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:09,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:02:09,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:02:09,735 INFO L87 Difference]: Start difference. First operand 81 states and 124 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-19 08:02:09,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:09,925 INFO L93 Difference]: Finished difference Result 222 states and 340 transitions. [2023-11-19 08:02:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:02:09,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 175 [2023-11-19 08:02:09,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:09,930 INFO L225 Difference]: With dead ends: 222 [2023-11-19 08:02:09,930 INFO L226 Difference]: Without dead ends: 144 [2023-11-19 08:02:09,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:02:09,933 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 93 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:09,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 421 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:02:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-19 08:02:09,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2023-11-19 08:02:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 91 states have (on average 1.3406593406593406) internal successors, (122), 92 states have internal predecessors, (122), 47 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (47), 46 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-19 08:02:09,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 216 transitions. [2023-11-19 08:02:09,964 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 216 transitions. Word has length 175 [2023-11-19 08:02:09,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:09,965 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 216 transitions. [2023-11-19 08:02:09,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-19 08:02:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 216 transitions. [2023-11-19 08:02:09,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-19 08:02:09,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:09,969 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:09,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 08:02:10,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:10,185 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:10,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1499409948, now seen corresponding path program 1 times [2023-11-19 08:02:10,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:10,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328681431] [2023-11-19 08:02:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:10,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:10,298 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:10,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658316104] [2023-11-19 08:02:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:10,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:10,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:10,310 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:10,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:02:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:10,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:02:10,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-19 08:02:10,541 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:10,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:10,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328681431] [2023-11-19 08:02:10,542 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:10,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658316104] [2023-11-19 08:02:10,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658316104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:10,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:10,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:02:10,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911140384] [2023-11-19 08:02:10,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:10,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:10,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:10,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:10,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:10,546 INFO L87 Difference]: Start difference. First operand 141 states and 216 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-19 08:02:10,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:10,663 INFO L93 Difference]: Finished difference Result 417 states and 642 transitions. [2023-11-19 08:02:10,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:10,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 175 [2023-11-19 08:02:10,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:10,670 INFO L225 Difference]: With dead ends: 417 [2023-11-19 08:02:10,670 INFO L226 Difference]: Without dead ends: 279 [2023-11-19 08:02:10,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:10,673 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 118 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:10,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 320 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:02:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-11-19 08:02:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 277. [2023-11-19 08:02:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 178 states have (on average 1.3426966292134832) internal successors, (239), 180 states have internal predecessors, (239), 94 states have call successors, (94), 4 states have call predecessors, (94), 4 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-19 08:02:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 427 transitions. [2023-11-19 08:02:10,737 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 427 transitions. Word has length 175 [2023-11-19 08:02:10,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:10,738 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 427 transitions. [2023-11-19 08:02:10,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-19 08:02:10,739 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 427 transitions. [2023-11-19 08:02:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-19 08:02:10,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:10,743 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:10,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:10,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:10,970 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:10,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:10,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1207209446, now seen corresponding path program 1 times [2023-11-19 08:02:10,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:10,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13936111] [2023-11-19 08:02:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:10,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:11,029 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:11,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281730007] [2023-11-19 08:02:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:11,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:11,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:11,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:11,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:02:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:11,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 08:02:11,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 564 proven. 96 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2023-11-19 08:02:11,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 1251 trivial. 0 not checked. [2023-11-19 08:02:11,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:11,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13936111] [2023-11-19 08:02:11,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:11,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281730007] [2023-11-19 08:02:11,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281730007] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:11,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:02:11,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-19 08:02:11,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677724914] [2023-11-19 08:02:11,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:11,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:02:11,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:11,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:02:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:02:11,902 INFO L87 Difference]: Start difference. First operand 277 states and 427 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 5 states have call successors, (33), 3 states have call predecessors, (33), 7 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) [2023-11-19 08:02:12,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:12,332 INFO L93 Difference]: Finished difference Result 455 states and 687 transitions. [2023-11-19 08:02:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 08:02:12,333 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 5 states have call successors, (33), 3 states have call predecessors, (33), 7 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) Word has length 175 [2023-11-19 08:02:12,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:12,337 INFO L225 Difference]: With dead ends: 455 [2023-11-19 08:02:12,337 INFO L226 Difference]: Without dead ends: 181 [2023-11-19 08:02:12,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:02:12,340 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 87 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:12,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 335 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:02:12,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-19 08:02:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 173. [2023-11-19 08:02:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 112 states have (on average 1.2946428571428572) internal successors, (145), 112 states have internal predecessors, (145), 54 states have call successors, (54), 6 states have call predecessors, (54), 6 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-19 08:02:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2023-11-19 08:02:12,375 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 175 [2023-11-19 08:02:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:12,376 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2023-11-19 08:02:12,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 5 states have call successors, (33), 3 states have call predecessors, (33), 7 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) [2023-11-19 08:02:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2023-11-19 08:02:12,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-19 08:02:12,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:12,379 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:12,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:12,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:12,603 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:12,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:12,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1056327789, now seen corresponding path program 1 times [2023-11-19 08:02:12,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:12,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874589954] [2023-11-19 08:02:12,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:12,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:12,686 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:12,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158916252] [2023-11-19 08:02:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:12,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:12,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:12,691 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:12,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:02:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:12,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:02:12,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-19 08:02:12,886 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:12,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:12,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874589954] [2023-11-19 08:02:12,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:12,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158916252] [2023-11-19 08:02:12,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158916252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:12,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:12,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:02:12,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912975340] [2023-11-19 08:02:12,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:12,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:12,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:12,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:12,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:12,889 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-19 08:02:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:12,919 INFO L93 Difference]: Finished difference Result 343 states and 503 transitions. [2023-11-19 08:02:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:12,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 176 [2023-11-19 08:02:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:12,922 INFO L225 Difference]: With dead ends: 343 [2023-11-19 08:02:12,922 INFO L226 Difference]: Without dead ends: 173 [2023-11-19 08:02:12,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:12,924 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 0 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:12,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 238 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:02:12,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-19 08:02:12,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2023-11-19 08:02:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 112 states have (on average 1.2767857142857142) internal successors, (143), 112 states have internal predecessors, (143), 54 states have call successors, (54), 6 states have call predecessors, (54), 6 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-19 08:02:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 251 transitions. [2023-11-19 08:02:12,957 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 251 transitions. Word has length 176 [2023-11-19 08:02:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:12,958 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 251 transitions. [2023-11-19 08:02:12,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-19 08:02:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 251 transitions. [2023-11-19 08:02:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-19 08:02:12,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:12,962 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:12,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:13,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:13,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:13,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:13,183 INFO L85 PathProgramCache]: Analyzing trace with hash 45210539, now seen corresponding path program 1 times [2023-11-19 08:02:13,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:13,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254196717] [2023-11-19 08:02:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:13,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:13,222 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:13,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766868074] [2023-11-19 08:02:13,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:13,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:13,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:13,223 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:13,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:02:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:13,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:02:13,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-19 08:02:13,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:13,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:13,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254196717] [2023-11-19 08:02:13,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:13,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766868074] [2023-11-19 08:02:13,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766868074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:13,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:13,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:02:13,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880488573] [2023-11-19 08:02:13,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:13,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:02:13,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:02:13,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:02:13,684 INFO L87 Difference]: Start difference. First operand 173 states and 251 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-19 08:02:13,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:13,825 INFO L93 Difference]: Finished difference Result 456 states and 664 transitions. [2023-11-19 08:02:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:02:13,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 176 [2023-11-19 08:02:13,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:13,829 INFO L225 Difference]: With dead ends: 456 [2023-11-19 08:02:13,830 INFO L226 Difference]: Without dead ends: 286 [2023-11-19 08:02:13,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:02:13,832 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 78 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:13,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 350 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:02:13,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-19 08:02:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 250. [2023-11-19 08:02:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 159 states have (on average 1.2389937106918238) internal successors, (197), 159 states have internal predecessors, (197), 81 states have call successors, (81), 9 states have call predecessors, (81), 9 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-19 08:02:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 359 transitions. [2023-11-19 08:02:13,874 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 359 transitions. Word has length 176 [2023-11-19 08:02:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:13,875 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 359 transitions. [2023-11-19 08:02:13,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-19 08:02:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 359 transitions. [2023-11-19 08:02:13,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-11-19 08:02:13,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:13,879 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:13,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:14,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:14,095 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:14,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:14,095 INFO L85 PathProgramCache]: Analyzing trace with hash -850925603, now seen corresponding path program 1 times [2023-11-19 08:02:14,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:14,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348488698] [2023-11-19 08:02:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:14,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:14,140 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:14,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803083079] [2023-11-19 08:02:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:14,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:14,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:14,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:14,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:02:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:14,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:02:14,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-19 08:02:14,625 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:14,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348488698] [2023-11-19 08:02:14,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803083079] [2023-11-19 08:02:14,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803083079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:14,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:14,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:02:14,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305890925] [2023-11-19 08:02:14,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:14,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:02:14,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:14,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:02:14,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:02:14,629 INFO L87 Difference]: Start difference. First operand 250 states and 359 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-19 08:02:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:15,025 INFO L93 Difference]: Finished difference Result 608 states and 878 transitions. [2023-11-19 08:02:15,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:02:15,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 177 [2023-11-19 08:02:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:15,030 INFO L225 Difference]: With dead ends: 608 [2023-11-19 08:02:15,030 INFO L226 Difference]: Without dead ends: 438 [2023-11-19 08:02:15,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:02:15,033 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 133 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:15,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 516 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:02:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-11-19 08:02:15,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 418. [2023-11-19 08:02:15,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 267 states have (on average 1.243445692883895) internal successors, (332), 267 states have internal predecessors, (332), 135 states have call successors, (135), 15 states have call predecessors, (135), 15 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-19 08:02:15,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 602 transitions. [2023-11-19 08:02:15,119 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 602 transitions. Word has length 177 [2023-11-19 08:02:15,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:15,123 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 602 transitions. [2023-11-19 08:02:15,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-19 08:02:15,124 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 602 transitions. [2023-11-19 08:02:15,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-19 08:02:15,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:15,126 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:15,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:15,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:15,345 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:15,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:15,345 INFO L85 PathProgramCache]: Analyzing trace with hash -990114020, now seen corresponding path program 1 times [2023-11-19 08:02:15,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:15,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120938350] [2023-11-19 08:02:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:15,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:15,394 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:15,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807192502] [2023-11-19 08:02:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:15,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:15,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:15,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:15,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:02:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:15,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 08:02:15,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 738 proven. 78 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2023-11-19 08:02:15,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2023-11-19 08:02:16,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:16,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120938350] [2023-11-19 08:02:16,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:16,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807192502] [2023-11-19 08:02:16,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807192502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:16,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:02:16,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2023-11-19 08:02:16,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442396686] [2023-11-19 08:02:16,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:16,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:02:16,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:16,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:02:16,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:02:16,111 INFO L87 Difference]: Start difference. First operand 418 states and 602 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 3 states have call successors, (41), 3 states have call predecessors, (41), 5 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-11-19 08:02:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:17,114 INFO L93 Difference]: Finished difference Result 1394 states and 1936 transitions. [2023-11-19 08:02:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-19 08:02:17,115 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 3 states have call successors, (41), 3 states have call predecessors, (41), 5 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 178 [2023-11-19 08:02:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:17,123 INFO L225 Difference]: With dead ends: 1394 [2023-11-19 08:02:17,123 INFO L226 Difference]: Without dead ends: 1056 [2023-11-19 08:02:17,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 346 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=333, Invalid=857, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 08:02:17,127 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 236 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:17,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 513 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 08:02:17,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2023-11-19 08:02:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 478. [2023-11-19 08:02:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 317 states have (on average 1.2113564668769716) internal successors, (384), 317 states have internal predecessors, (384), 135 states have call successors, (135), 25 states have call predecessors, (135), 25 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-19 08:02:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 654 transitions. [2023-11-19 08:02:17,229 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 654 transitions. Word has length 178 [2023-11-19 08:02:17,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:17,230 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 654 transitions. [2023-11-19 08:02:17,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 3 states have call successors, (41), 3 states have call predecessors, (41), 5 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-11-19 08:02:17,231 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 654 transitions. [2023-11-19 08:02:17,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-19 08:02:17,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:17,233 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:17,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:17,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:17,455 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:17,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:17,455 INFO L85 PathProgramCache]: Analyzing trace with hash 784893342, now seen corresponding path program 1 times [2023-11-19 08:02:17,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:17,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323586435] [2023-11-19 08:02:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:17,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:17,486 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:17,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639797065] [2023-11-19 08:02:17,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:17,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:17,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:17,488 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:17,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:02:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:17,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 08:02:17,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 276 proven. 198 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2023-11-19 08:02:19,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:48,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:48,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323586435] [2023-11-19 08:02:48,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:48,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639797065] [2023-11-19 08:02:48,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639797065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:48,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:02:48,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-19 08:02:48,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956917588] [2023-11-19 08:02:48,062 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:48,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:02:48,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:48,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:02:48,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2023-11-19 08:02:48,064 INFO L87 Difference]: Start difference. First operand 478 states and 654 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-11-19 08:02:49,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:49,000 INFO L93 Difference]: Finished difference Result 924 states and 1237 transitions. [2023-11-19 08:02:49,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 08:02:49,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 178 [2023-11-19 08:02:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:49,005 INFO L225 Difference]: With dead ends: 924 [2023-11-19 08:02:49,005 INFO L226 Difference]: Without dead ends: 534 [2023-11-19 08:02:49,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2023-11-19 08:02:49,008 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 61 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:49,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 391 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 08:02:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-11-19 08:02:49,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 514. [2023-11-19 08:02:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 344 states have (on average 1.188953488372093) internal successors, (409), 344 states have internal predecessors, (409), 135 states have call successors, (135), 34 states have call predecessors, (135), 34 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-19 08:02:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 679 transitions. [2023-11-19 08:02:49,115 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 679 transitions. Word has length 178 [2023-11-19 08:02:49,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:49,116 INFO L495 AbstractCegarLoop]: Abstraction has 514 states and 679 transitions. [2023-11-19 08:02:49,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-11-19 08:02:49,116 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 679 transitions. [2023-11-19 08:02:49,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-19 08:02:49,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:49,119 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:49,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:49,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 08:02:49,335 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:49,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1248279458, now seen corresponding path program 1 times [2023-11-19 08:02:49,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:49,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985604509] [2023-11-19 08:02:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:49,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:49,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:49,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445263770] [2023-11-19 08:02:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:49,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:49,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:49,378 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:49,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda2a025-2789-4dfe-9918-c1e8242b9c03/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:02:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:49,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-19 08:02:49,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 338 proven. 300 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2023-11-19 08:02:52,426 INFO L327 TraceCheckSpWp]: Computing backward predicates...