./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/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_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/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_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/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 b50c918f4161b5cc99814dedbb1d5f1068fe72db189eac8c3c500593eb4daaee --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:38:21,053 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:38:21,175 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:38:21,188 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:38:21,189 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:38:21,231 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:38:21,232 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:38:21,232 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:38:21,234 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:38:21,238 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:38:21,240 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:38:21,240 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:38:21,241 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:38:21,243 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:38:21,243 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:38:21,244 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:38:21,244 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:38:21,245 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:38:21,245 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:38:21,246 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:38:21,246 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:38:21,247 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:38:21,247 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:38:21,248 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:38:21,248 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:38:21,249 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:38:21,250 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:38:21,250 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:38:21,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:38:21,251 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:38:21,252 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:38:21,253 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:38:21,253 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:38:21,253 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:38:21,254 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:38:21,254 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:38:21,254 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:38:21,254 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:38:21,255 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:38:21,255 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_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b50c918f4161b5cc99814dedbb1d5f1068fe72db189eac8c3c500593eb4daaee [2023-11-19 07:38:21,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:38:21,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:38:21,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:38:21,559 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:38:21,559 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:38:21,561 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i [2023-11-19 07:38:24,881 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:38:25,153 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:38:25,154 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i [2023-11-19 07:38:25,173 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/data/c2f1d17c7/dc6ea522574a4ac7881cc124b52f9e61/FLAG210841ba0 [2023-11-19 07:38:25,189 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/data/c2f1d17c7/dc6ea522574a4ac7881cc124b52f9e61 [2023-11-19 07:38:25,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:38:25,199 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:38:25,203 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:38:25,203 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:38:25,209 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:38:25,210 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:25" (1/1) ... [2023-11-19 07:38:25,211 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f1c69b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:25, skipping insertion in model container [2023-11-19 07:38:25,211 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:25" (1/1) ... [2023-11-19 07:38:25,263 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:38:25,406 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_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i[919,932] [2023-11-19 07:38:25,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:38:25,503 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:38:25,515 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_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i[919,932] [2023-11-19 07:38:25,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:38:25,600 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:38:25,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:25 WrapperNode [2023-11-19 07:38:25,600 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:38:25,602 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:38:25,602 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:38:25,602 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:38:25,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:25" (1/1) ... [2023-11-19 07:38:25,639 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:25" (1/1) ... [2023-11-19 07:38:25,696 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 240 [2023-11-19 07:38:25,696 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:38:25,697 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:38:25,697 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:38:25,697 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:38:25,708 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:25" (1/1) ... [2023-11-19 07:38:25,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:25" (1/1) ... [2023-11-19 07:38:25,712 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:25" (1/1) ... [2023-11-19 07:38:25,713 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:25" (1/1) ... [2023-11-19 07:38:25,729 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:25" (1/1) ... [2023-11-19 07:38:25,733 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:25" (1/1) ... [2023-11-19 07:38:25,736 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:25" (1/1) ... [2023-11-19 07:38:25,740 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:25" (1/1) ... [2023-11-19 07:38:25,751 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:38:25,752 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:38:25,752 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:38:25,753 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:38:25,754 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:25" (1/1) ... [2023-11-19 07:38:25,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:38:25,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:25,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:25,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:38:25,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:38:25,836 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:38:25,837 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:38:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:38:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:38:25,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:38:25,976 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:38:25,978 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:38:26,543 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:38:26,554 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:38:26,554 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:38:26,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:26 BoogieIcfgContainer [2023-11-19 07:38:26,559 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:38:26,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:38:26,562 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:38:26,566 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:38:26,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:38:25" (1/3) ... [2023-11-19 07:38:26,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494bf84b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:38:26, skipping insertion in model container [2023-11-19 07:38:26,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:25" (2/3) ... [2023-11-19 07:38:26,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494bf84b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:38:26, skipping insertion in model container [2023-11-19 07:38:26,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:26" (3/3) ... [2023-11-19 07:38:26,570 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i [2023-11-19 07:38:26,591 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:38:26,592 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:38:26,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:38:26,695 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;@7e039a0a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:38:26,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:38:26,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 63 states have internal predecessors, (88), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-19 07:38:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-19 07:38:26,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:26,756 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:26,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:26,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:26,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1295753400, now seen corresponding path program 1 times [2023-11-19 07:38:26,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:26,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561540619] [2023-11-19 07:38:26,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:26,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:27,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:27,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561540619] [2023-11-19 07:38:27,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:38:27,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34686253] [2023-11-19 07:38:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:27,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:27,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:27,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:27,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:38:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:27,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:38:27,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2023-11-19 07:38:27,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:38:27,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34686253] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:27,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:27,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:38:27,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81818465] [2023-11-19 07:38:27,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:27,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:38:27,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:27,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:38:27,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:38:27,720 INFO L87 Difference]: Start difference. First operand has 107 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 63 states have internal predecessors, (88), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-19 07:38:27,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:27,764 INFO L93 Difference]: Finished difference Result 207 states and 380 transitions. [2023-11-19 07:38:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:38:27,767 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) Word has length 256 [2023-11-19 07:38:27,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:27,777 INFO L225 Difference]: With dead ends: 207 [2023-11-19 07:38:27,777 INFO L226 Difference]: Without dead ends: 103 [2023-11-19 07:38:27,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:38:27,788 INFO L413 NwaCegarLoop]: 165 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, 165 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:27,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:27,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-19 07:38:27,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-11-19 07:38:27,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-19 07:38:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 165 transitions. [2023-11-19 07:38:27,858 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 165 transitions. Word has length 256 [2023-11-19 07:38:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:27,859 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 165 transitions. [2023-11-19 07:38:27,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-19 07:38:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 165 transitions. [2023-11-19 07:38:27,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-19 07:38:27,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:27,866 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:27,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:38:28,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:28,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:28,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:28,092 INFO L85 PathProgramCache]: Analyzing trace with hash 2024155708, now seen corresponding path program 1 times [2023-11-19 07:38:28,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:28,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261049311] [2023-11-19 07:38:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:28,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:28,246 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:28,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641474144] [2023-11-19 07:38:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:28,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:28,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:28,258 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:28,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:38:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:28,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:38:28,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 893 proven. 105 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2023-11-19 07:38:29,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 18 proven. 105 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-11-19 07:38:30,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261049311] [2023-11-19 07:38:30,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:30,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641474144] [2023-11-19 07:38:30,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641474144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:30,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:38:30,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-19 07:38:30,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089833616] [2023-11-19 07:38:30,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:30,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:38:30,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:30,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:38:30,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:38:30,617 INFO L87 Difference]: Start difference. First operand 103 states and 165 transitions. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 4 states have call successors, (84), 3 states have call predecessors, (84), 5 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) [2023-11-19 07:38:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:34,629 INFO L93 Difference]: Finished difference Result 1019 states and 1568 transitions. [2023-11-19 07:38:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-19 07:38:34,629 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 4 states have call successors, (84), 3 states have call predecessors, (84), 5 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) Word has length 256 [2023-11-19 07:38:34,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:34,648 INFO L225 Difference]: With dead ends: 1019 [2023-11-19 07:38:34,648 INFO L226 Difference]: Without dead ends: 919 [2023-11-19 07:38:34,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1165, Invalid=3391, Unknown=0, NotChecked=0, Total=4556 [2023-11-19 07:38:34,654 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 746 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 2299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:34,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 1350 Invalid, 2879 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [580 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-19 07:38:34,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2023-11-19 07:38:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 519. [2023-11-19 07:38:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 319 states have (on average 1.3949843260188088) internal successors, (445), 323 states have internal predecessors, (445), 187 states have call successors, (187), 12 states have call predecessors, (187), 12 states have return successors, (187), 183 states have call predecessors, (187), 187 states have call successors, (187) [2023-11-19 07:38:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 819 transitions. [2023-11-19 07:38:34,877 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 819 transitions. Word has length 256 [2023-11-19 07:38:34,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:34,881 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 819 transitions. [2023-11-19 07:38:34,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 4 states have call successors, (84), 3 states have call predecessors, (84), 5 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) [2023-11-19 07:38:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 819 transitions. [2023-11-19 07:38:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-19 07:38:34,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:34,890 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:34,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:35,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:35,112 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:35,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:35,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1003087354, now seen corresponding path program 1 times [2023-11-19 07:38:35,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:35,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187860048] [2023-11-19 07:38:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:35,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:35,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:35,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118050691] [2023-11-19 07:38:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:35,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:35,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:35,198 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:35,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:38:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:35,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:38:35,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-19 07:38:36,599 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:38:36,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:36,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187860048] [2023-11-19 07:38:36,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:36,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118050691] [2023-11-19 07:38:36,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118050691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:36,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:36,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:38:36,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99503948] [2023-11-19 07:38:36,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:36,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:38:36,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:36,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:38:36,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:38:36,605 INFO L87 Difference]: Start difference. First operand 519 states and 819 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-19 07:38:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:37,949 INFO L93 Difference]: Finished difference Result 1378 states and 2157 transitions. [2023-11-19 07:38:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:38:37,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 256 [2023-11-19 07:38:37,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:37,960 INFO L225 Difference]: With dead ends: 1378 [2023-11-19 07:38:37,960 INFO L226 Difference]: Without dead ends: 862 [2023-11-19 07:38:37,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:38:37,964 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 312 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:37,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 672 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:38:37,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2023-11-19 07:38:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 700. [2023-11-19 07:38:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 442 states have (on average 1.4027149321266967) internal successors, (620), 448 states have internal predecessors, (620), 239 states have call successors, (239), 18 states have call predecessors, (239), 18 states have return successors, (239), 233 states have call predecessors, (239), 239 states have call successors, (239) [2023-11-19 07:38:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1098 transitions. [2023-11-19 07:38:38,117 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1098 transitions. Word has length 256 [2023-11-19 07:38:38,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:38,119 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 1098 transitions. [2023-11-19 07:38:38,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-19 07:38:38,119 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1098 transitions. [2023-11-19 07:38:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-19 07:38:38,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:38,126 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:38,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:38,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 07:38:38,340 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:38,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:38,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1297735236, now seen corresponding path program 1 times [2023-11-19 07:38:38,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:38,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318012595] [2023-11-19 07:38:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:38,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:38,426 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:38,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293503575] [2023-11-19 07:38:38,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:38,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:38,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:38,428 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:38,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:38:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:38,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:38:38,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-19 07:38:39,530 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:38:39,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:39,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318012595] [2023-11-19 07:38:39,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:39,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293503575] [2023-11-19 07:38:39,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293503575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:39,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:39,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:38:39,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519197216] [2023-11-19 07:38:39,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:39,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:38:39,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:39,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:38:39,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:38:39,535 INFO L87 Difference]: Start difference. First operand 700 states and 1098 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-19 07:38:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:39,985 INFO L93 Difference]: Finished difference Result 1648 states and 2595 transitions. [2023-11-19 07:38:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:38:39,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 256 [2023-11-19 07:38:39,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:39,995 INFO L225 Difference]: With dead ends: 1648 [2023-11-19 07:38:39,996 INFO L226 Difference]: Without dead ends: 951 [2023-11-19 07:38:39,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:38:40,000 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 125 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:40,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 526 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:38:40,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2023-11-19 07:38:40,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 779. [2023-11-19 07:38:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 476 states have (on average 1.3739495798319328) internal successors, (654), 482 states have internal predecessors, (654), 281 states have call successors, (281), 21 states have call predecessors, (281), 21 states have return successors, (281), 275 states have call predecessors, (281), 281 states have call successors, (281) [2023-11-19 07:38:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1216 transitions. [2023-11-19 07:38:40,166 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1216 transitions. Word has length 256 [2023-11-19 07:38:40,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:40,167 INFO L495 AbstractCegarLoop]: Abstraction has 779 states and 1216 transitions. [2023-11-19 07:38:40,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-19 07:38:40,168 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1216 transitions. [2023-11-19 07:38:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-11-19 07:38:40,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:40,173 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:40,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:40,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:40,381 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:40,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:40,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1601356196, now seen corresponding path program 1 times [2023-11-19 07:38:40,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:40,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023872704] [2023-11-19 07:38:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:40,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:40,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:40,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868340254] [2023-11-19 07:38:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:40,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:40,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:40,435 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:40,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:38:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:40,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:38:40,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1163 proven. 24 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2023-11-19 07:38:41,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:49,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:49,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023872704] [2023-11-19 07:38:49,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:49,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868340254] [2023-11-19 07:38:49,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868340254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:49,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:38:49,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-19 07:38:49,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308872163] [2023-11-19 07:38:49,197 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:49,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:38:49,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:49,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:38:49,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=115, Unknown=1, NotChecked=0, Total=156 [2023-11-19 07:38:49,199 INFO L87 Difference]: Start difference. First operand 779 states and 1216 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-19 07:38:56,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:56,257 INFO L93 Difference]: Finished difference Result 1762 states and 2687 transitions. [2023-11-19 07:38:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 07:38:56,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 257 [2023-11-19 07:38:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:56,269 INFO L225 Difference]: With dead ends: 1762 [2023-11-19 07:38:56,270 INFO L226 Difference]: Without dead ends: 1065 [2023-11-19 07:38:56,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=311, Invalid=744, Unknown=1, NotChecked=0, Total=1056 [2023-11-19 07:38:56,274 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 296 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 297 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:56,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 862 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 926 Invalid, 8 Unknown, 0 Unchecked, 4.9s Time] [2023-11-19 07:38:56,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2023-11-19 07:38:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 796. [2023-11-19 07:38:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 489 states have (on average 1.3660531697341514) internal successors, (668), 495 states have internal predecessors, (668), 281 states have call successors, (281), 25 states have call predecessors, (281), 25 states have return successors, (281), 275 states have call predecessors, (281), 281 states have call successors, (281) [2023-11-19 07:38:56,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1230 transitions. [2023-11-19 07:38:56,452 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1230 transitions. Word has length 257 [2023-11-19 07:38:56,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:56,453 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1230 transitions. [2023-11-19 07:38:56,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-19 07:38:56,454 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1230 transitions. [2023-11-19 07:38:56,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-11-19 07:38:56,459 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:56,460 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:56,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:56,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:56,668 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:56,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:56,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2083199769, now seen corresponding path program 1 times [2023-11-19 07:38:56,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:56,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190243322] [2023-11-19 07:38:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:56,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:56,711 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:56,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650744456] [2023-11-19 07:38:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:56,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:56,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:56,713 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:56,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:38:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:56,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:38:56,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1553 proven. 39 refuted. 0 times theorem prover too weak. 1852 trivial. 0 not checked. [2023-11-19 07:38:57,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 84 proven. 39 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-11-19 07:38:58,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:58,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190243322] [2023-11-19 07:38:58,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:58,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650744456] [2023-11-19 07:38:58,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650744456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:58,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:38:58,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:38:58,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030622067] [2023-11-19 07:38:58,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:58,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:38:58,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:38:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:38:58,284 INFO L87 Difference]: Start difference. First operand 796 states and 1230 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2023-11-19 07:38:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:59,425 INFO L93 Difference]: Finished difference Result 1570 states and 2395 transitions. [2023-11-19 07:38:59,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:38:59,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) Word has length 258 [2023-11-19 07:38:59,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:59,433 INFO L225 Difference]: With dead ends: 1570 [2023-11-19 07:38:59,433 INFO L226 Difference]: Without dead ends: 864 [2023-11-19 07:38:59,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 508 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:38:59,437 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 89 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:59,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 260 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:38:59,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2023-11-19 07:38:59,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 820. [2023-11-19 07:38:59,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 507 states have (on average 1.3136094674556213) internal successors, (666), 513 states have internal predecessors, (666), 281 states have call successors, (281), 31 states have call predecessors, (281), 31 states have return successors, (281), 275 states have call predecessors, (281), 281 states have call successors, (281) [2023-11-19 07:38:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1228 transitions. [2023-11-19 07:38:59,608 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1228 transitions. Word has length 258 [2023-11-19 07:38:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:59,609 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 1228 transitions. [2023-11-19 07:38:59,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2023-11-19 07:38:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1228 transitions. [2023-11-19 07:38:59,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-11-19 07:38:59,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:59,616 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:59,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:59,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:59,832 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:59,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:59,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1531709157, now seen corresponding path program 1 times [2023-11-19 07:38:59,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:59,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75656429] [2023-11-19 07:38:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:59,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:59,868 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:59,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920062860] [2023-11-19 07:38:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:59,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:59,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:59,870 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:59,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:39:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:00,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:39:00,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1163 proven. 24 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2023-11-19 07:39:02,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:09,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:09,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75656429] [2023-11-19 07:39:09,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:39:09,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920062860] [2023-11-19 07:39:09,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920062860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:09,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:39:09,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-11-19 07:39:09,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133692558] [2023-11-19 07:39:09,465 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:09,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:39:09,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:09,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:39:09,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=77, Unknown=2, NotChecked=0, Total=110 [2023-11-19 07:39:09,467 INFO L87 Difference]: Start difference. First operand 820 states and 1228 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-19 07:39:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:13,793 INFO L93 Difference]: Finished difference Result 2206 states and 3254 transitions. [2023-11-19 07:39:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:39:13,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 258 [2023-11-19 07:39:13,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:13,812 INFO L225 Difference]: With dead ends: 2206 [2023-11-19 07:39:13,812 INFO L226 Difference]: Without dead ends: 1480 [2023-11-19 07:39:13,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=156, Invalid=348, Unknown=2, NotChecked=0, Total=506 [2023-11-19 07:39:13,816 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 174 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 105 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:13,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 857 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 674 Invalid, 7 Unknown, 0 Unchecked, 3.2s Time] [2023-11-19 07:39:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2023-11-19 07:39:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1258. [2023-11-19 07:39:14,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 757 states have (on average 1.2826948480845441) internal successors, (971), 765 states have internal predecessors, (971), 449 states have call successors, (449), 51 states have call predecessors, (449), 51 states have return successors, (449), 441 states have call predecessors, (449), 449 states have call successors, (449) [2023-11-19 07:39:14,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1869 transitions. [2023-11-19 07:39:14,069 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1869 transitions. Word has length 258 [2023-11-19 07:39:14,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:14,070 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 1869 transitions. [2023-11-19 07:39:14,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-19 07:39:14,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1869 transitions. [2023-11-19 07:39:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-11-19 07:39:14,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:14,073 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:14,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:14,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:14,294 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:14,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:14,294 INFO L85 PathProgramCache]: Analyzing trace with hash -835943698, now seen corresponding path program 1 times [2023-11-19 07:39:14,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:14,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020142589] [2023-11-19 07:39:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:14,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:14,330 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:14,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409638376] [2023-11-19 07:39:14,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:14,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:14,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:14,332 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:14,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cc20515-2f0b-47f4-a343-d0b3dbf8eb3c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:39:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:14,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:39:14,572 INFO L285 TraceCheckSpWp]: Computing forward predicates...