./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-79.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-79.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme --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 68466dc8851e15d5c55e16cb6abd8cdccbbd4db381e8ec074cd8097ac9916cb7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:00:45,798 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:00:45,916 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:00:45,922 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:00:45,922 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:00:45,969 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:00:45,971 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:00:45,972 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:00:45,973 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:00:45,978 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:00:45,979 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:00:45,979 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:00:45,980 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:00:45,982 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:00:45,982 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:00:45,983 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:00:45,983 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:00:45,983 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:00:45,984 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:00:45,984 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:00:45,985 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:00:45,985 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:00:45,986 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:00:45,986 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:00:45,987 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:00:45,987 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:00:45,988 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:00:45,989 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:00:45,989 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:00:45,990 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:00:45,991 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:00:45,991 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:00:45,991 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:00:45,992 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:00:45,992 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:00:45,992 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:00:45,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:00:45,993 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:00:45,993 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:00:45,993 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:00:45,993 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:00:45,994 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:00:45,995 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_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68466dc8851e15d5c55e16cb6abd8cdccbbd4db381e8ec074cd8097ac9916cb7 [2023-11-26 12:00:46,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:00:46,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:00:46,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:00:46,336 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:00:46,336 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:00:46,338 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-79.i [2023-11-26 12:00:49,432 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:00:49,757 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:00:49,757 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-79.i [2023-11-26 12:00:49,770 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/data/1ec1e6ee9/12aa57e599d341babf2a2a99eb565d81/FLAGf4545aafe [2023-11-26 12:00:49,784 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/data/1ec1e6ee9/12aa57e599d341babf2a2a99eb565d81 [2023-11-26 12:00:49,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:00:49,789 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:00:49,790 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:00:49,791 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:00:49,796 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:00:49,797 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:49" (1/1) ... [2023-11-26 12:00:49,798 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc27cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:49, skipping insertion in model container [2023-11-26 12:00:49,798 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:49" (1/1) ... [2023-11-26 12:00:49,838 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:00:50,029 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_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-79.i[916,929] [2023-11-26 12:00:50,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:00:50,190 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:00:50,202 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_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-79.i[916,929] [2023-11-26 12:00:50,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:00:50,283 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:00:50,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50 WrapperNode [2023-11-26 12:00:50,284 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:00:50,285 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:00:50,285 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:00:50,286 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:00:50,293 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50" (1/1) ... [2023-11-26 12:00:50,310 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50" (1/1) ... [2023-11-26 12:00:50,379 INFO L138 Inliner]: procedures = 26, calls = 86, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 425 [2023-11-26 12:00:50,379 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:00:50,380 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:00:50,383 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:00:50,383 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:00:50,395 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50" (1/1) ... [2023-11-26 12:00:50,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50" (1/1) ... [2023-11-26 12:00:50,403 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50" (1/1) ... [2023-11-26 12:00:50,450 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 12:00:50,451 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50" (1/1) ... [2023-11-26 12:00:50,451 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50" (1/1) ... [2023-11-26 12:00:50,495 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50" (1/1) ... [2023-11-26 12:00:50,499 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50" (1/1) ... [2023-11-26 12:00:50,518 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50" (1/1) ... [2023-11-26 12:00:50,523 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50" (1/1) ... [2023-11-26 12:00:50,534 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:00:50,535 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:00:50,535 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:00:50,535 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:00:50,536 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50" (1/1) ... [2023-11-26 12:00:50,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:00:50,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:50,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:00:50,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:00:50,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:00:50,709 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 12:00:50,710 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 12:00:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:00:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:00:50,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:00:50,873 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:00:50,876 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:00:51,652 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:00:51,721 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:00:51,721 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 12:00:51,722 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:51 BoogieIcfgContainer [2023-11-26 12:00:51,722 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:00:51,727 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:00:51,727 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:00:51,731 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:00:51,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:00:49" (1/3) ... [2023-11-26 12:00:51,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e70b189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:51, skipping insertion in model container [2023-11-26 12:00:51,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50" (2/3) ... [2023-11-26 12:00:51,735 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e70b189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:51, skipping insertion in model container [2023-11-26 12:00:51,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:51" (3/3) ... [2023-11-26 12:00:51,737 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-100_file-79.i [2023-11-26 12:00:51,758 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:00:51,759 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:00:51,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:00:51,842 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;@5c5a8630, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:00:51,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:00:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 91 states have (on average 1.4285714285714286) internal successors, (130), 92 states have internal predecessors, (130), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-26 12:00:51,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-26 12:00:51,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:51,885 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:51,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:51,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1895325074, now seen corresponding path program 1 times [2023-11-26 12:00:51,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:51,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398103026] [2023-11-26 12:00:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:51,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:52,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:52,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398103026] [2023-11-26 12:00:52,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 12:00:52,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800461941] [2023-11-26 12:00:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:52,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:52,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:52,425 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:52,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:00:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:52,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 12:00:52,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 10368 trivial. 0 not checked. [2023-11-26 12:00:52,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:52,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800461941] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:52,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:52,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:52,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782192822] [2023-11-26 12:00:52,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:52,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 12:00:52,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:53,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 12:00:53,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:00:53,034 INFO L87 Difference]: Start difference. First operand has 167 states, 91 states have (on average 1.4285714285714286) internal successors, (130), 92 states have internal predecessors, (130), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Second operand has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-26 12:00:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:53,116 INFO L93 Difference]: Finished difference Result 331 states and 623 transitions. [2023-11-26 12:00:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 12:00:53,123 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 2 states have call successors, (73) Word has length 437 [2023-11-26 12:00:53,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:53,141 INFO L225 Difference]: With dead ends: 331 [2023-11-26 12:00:53,143 INFO L226 Difference]: Without dead ends: 165 [2023-11-26 12:00:53,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:00:53,154 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:53,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 267 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:53,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-26 12:00:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-11-26 12:00:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 90 states have (on average 1.3777777777777778) internal successors, (124), 90 states have internal predecessors, (124), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-26 12:00:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 270 transitions. [2023-11-26 12:00:53,252 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 270 transitions. Word has length 437 [2023-11-26 12:00:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:53,253 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 270 transitions. [2023-11-26 12:00:53,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-26 12:00:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 270 transitions. [2023-11-26 12:00:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-26 12:00:53,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:53,269 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:53,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:53,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 12:00:53,471 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:53,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:53,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1719710484, now seen corresponding path program 1 times [2023-11-26 12:00:53,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:53,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324819003] [2023-11-26 12:00:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:53,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:53,681 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:53,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230510382] [2023-11-26 12:00:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:53,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:53,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:53,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:53,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:00:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:54,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 12:00:54,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-26 12:00:54,143 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:54,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:54,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324819003] [2023-11-26 12:00:54,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:54,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230510382] [2023-11-26 12:00:54,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230510382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:54,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:54,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693106130] [2023-11-26 12:00:54,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:54,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:54,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:54,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:54,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:54,156 INFO L87 Difference]: Start difference. First operand 165 states and 270 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-26 12:00:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:54,252 INFO L93 Difference]: Finished difference Result 340 states and 553 transitions. [2023-11-26 12:00:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:54,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 437 [2023-11-26 12:00:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:54,260 INFO L225 Difference]: With dead ends: 340 [2023-11-26 12:00:54,263 INFO L226 Difference]: Without dead ends: 176 [2023-11-26 12:00:54,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:54,289 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 31 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:54,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 516 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:54,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-11-26 12:00:54,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2023-11-26 12:00:54,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 95 states have (on average 1.3473684210526315) internal successors, (128), 96 states have internal predecessors, (128), 77 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-26 12:00:54,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 282 transitions. [2023-11-26 12:00:54,359 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 282 transitions. Word has length 437 [2023-11-26 12:00:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:54,364 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 282 transitions. [2023-11-26 12:00:54,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-26 12:00:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 282 transitions. [2023-11-26 12:00:54,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-26 12:00:54,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:54,373 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:54,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 12:00:54,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 12:00:54,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:54,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:54,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1529260950, now seen corresponding path program 1 times [2023-11-26 12:00:54,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:54,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241755741] [2023-11-26 12:00:54,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:54,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:54,684 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:54,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115096041] [2023-11-26 12:00:54,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:54,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:54,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:54,686 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:54,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:00:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:55,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:00:55,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 5088 proven. 84 refuted. 0 times theorem prover too weak. 5340 trivial. 0 not checked. [2023-11-26 12:00:55,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 132 proven. 84 refuted. 0 times theorem prover too weak. 10296 trivial. 0 not checked. [2023-11-26 12:00:55,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:55,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241755741] [2023-11-26 12:00:55,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:55,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115096041] [2023-11-26 12:00:55,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115096041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:55,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:55,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 12:00:55,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225794517] [2023-11-26 12:00:55,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:55,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:00:55,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:55,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:00:55,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:00:55,833 INFO L87 Difference]: Start difference. First operand 175 states and 282 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) [2023-11-26 12:00:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:56,398 INFO L93 Difference]: Finished difference Result 352 states and 560 transitions. [2023-11-26 12:00:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:00:56,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) Word has length 438 [2023-11-26 12:00:56,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:56,407 INFO L225 Difference]: With dead ends: 352 [2023-11-26 12:00:56,407 INFO L226 Difference]: Without dead ends: 184 [2023-11-26 12:00:56,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 868 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 12:00:56,411 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 143 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:56,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 410 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:00:56,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-26 12:00:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 178. [2023-11-26 12:00:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 97 states have (on average 1.3195876288659794) internal successors, (128), 98 states have internal predecessors, (128), 77 states have call successors, (77), 3 states have call predecessors, (77), 3 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-26 12:00:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 282 transitions. [2023-11-26 12:00:56,483 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 282 transitions. Word has length 438 [2023-11-26 12:00:56,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:56,491 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 282 transitions. [2023-11-26 12:00:56,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) [2023-11-26 12:00:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 282 transitions. [2023-11-26 12:00:56,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-26 12:00:56,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:56,500 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:56,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:56,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:56,708 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:56,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:56,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1297012587, now seen corresponding path program 1 times [2023-11-26 12:00:56,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:56,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358632570] [2023-11-26 12:00:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:56,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:56,790 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:56,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078862849] [2023-11-26 12:00:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:56,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:56,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:56,793 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:56,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:00:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:57,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:00:57,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 4678 proven. 69 refuted. 0 times theorem prover too weak. 5765 trivial. 0 not checked. [2023-11-26 12:00:57,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 147 proven. 69 refuted. 0 times theorem prover too weak. 10296 trivial. 0 not checked. [2023-11-26 12:00:58,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:58,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358632570] [2023-11-26 12:00:58,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:58,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078862849] [2023-11-26 12:00:58,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078862849] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:58,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:58,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 12:00:58,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718822539] [2023-11-26 12:00:58,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:58,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:00:58,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:58,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:00:58,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:00:58,030 INFO L87 Difference]: Start difference. First operand 178 states and 282 transitions. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 3 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 3 states have call predecessors, (97), 3 states have call successors, (97) [2023-11-26 12:00:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:58,605 INFO L93 Difference]: Finished difference Result 359 states and 562 transitions. [2023-11-26 12:00:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:00:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 3 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 3 states have call predecessors, (97), 3 states have call successors, (97) Word has length 439 [2023-11-26 12:00:58,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:58,613 INFO L225 Difference]: With dead ends: 359 [2023-11-26 12:00:58,613 INFO L226 Difference]: Without dead ends: 188 [2023-11-26 12:00:58,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 870 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:00:58,615 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 233 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:58,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 388 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:00:58,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-26 12:00:58,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 182. [2023-11-26 12:00:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 100 states have (on average 1.29) internal successors, (129), 101 states have internal predecessors, (129), 77 states have call successors, (77), 4 states have call predecessors, (77), 4 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-26 12:00:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 283 transitions. [2023-11-26 12:00:58,675 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 283 transitions. Word has length 439 [2023-11-26 12:00:58,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:58,677 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 283 transitions. [2023-11-26 12:00:58,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 3 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 3 states have call predecessors, (97), 3 states have call successors, (97) [2023-11-26 12:00:58,678 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 283 transitions. [2023-11-26 12:00:58,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-26 12:00:58,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:58,682 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:58,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:58,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:58,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:58,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash -382736305, now seen corresponding path program 1 times [2023-11-26 12:00:58,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:58,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913845263] [2023-11-26 12:00:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:58,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:58,962 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:58,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524389317] [2023-11-26 12:00:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:58,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:58,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:58,964 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:58,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:00:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:59,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 12:00:59,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-26 12:00:59,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:59,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:59,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913845263] [2023-11-26 12:00:59,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:59,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524389317] [2023-11-26 12:00:59,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524389317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:59,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:00,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:01:00,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732715034] [2023-11-26 12:01:00,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:00,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:00,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:00,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:00,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:01:00,008 INFO L87 Difference]: Start difference. First operand 182 states and 283 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-26 12:01:00,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:00,077 INFO L93 Difference]: Finished difference Result 532 states and 827 transitions. [2023-11-26 12:01:00,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:00,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 440 [2023-11-26 12:01:00,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:00,082 INFO L225 Difference]: With dead ends: 532 [2023-11-26 12:01:00,083 INFO L226 Difference]: Without dead ends: 357 [2023-11-26 12:01:00,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:01:00,085 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 42 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:00,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 521 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:01:00,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-11-26 12:01:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 355. [2023-11-26 12:01:00,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 196 states have (on average 1.2857142857142858) internal successors, (252), 197 states have internal predecessors, (252), 150 states have call successors, (150), 8 states have call predecessors, (150), 8 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-26 12:01:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 552 transitions. [2023-11-26 12:01:00,191 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 552 transitions. Word has length 440 [2023-11-26 12:01:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:00,193 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 552 transitions. [2023-11-26 12:01:00,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-26 12:01:00,194 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 552 transitions. [2023-11-26 12:01:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-26 12:01:00,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:00,198 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:00,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:00,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:00,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:00,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:00,408 INFO L85 PathProgramCache]: Analyzing trace with hash -11278666, now seen corresponding path program 1 times [2023-11-26 12:01:00,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:00,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598017328] [2023-11-26 12:01:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:00,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:00,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:01:00,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667908867] [2023-11-26 12:01:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:00,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:00,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:00,504 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:00,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:01:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:00,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:01:00,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 3348 proven. 174 refuted. 0 times theorem prover too weak. 6990 trivial. 0 not checked. [2023-11-26 12:01:01,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 42 proven. 174 refuted. 0 times theorem prover too weak. 10296 trivial. 0 not checked. [2023-11-26 12:01:02,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:02,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598017328] [2023-11-26 12:01:02,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:01:02,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667908867] [2023-11-26 12:01:02,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667908867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:02,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:01:02,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-26 12:01:02,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411049600] [2023-11-26 12:01:02,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:02,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 12:01:02,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:02,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 12:01:02,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 12:01:02,050 INFO L87 Difference]: Start difference. First operand 355 states and 552 transitions. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 2 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 2 states have call predecessors, (132), 2 states have call successors, (132) [2023-11-26 12:01:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:02,646 INFO L93 Difference]: Finished difference Result 554 states and 846 transitions. [2023-11-26 12:01:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:01:02,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 2 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 2 states have call predecessors, (132), 2 states have call successors, (132) Word has length 441 [2023-11-26 12:01:02,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:02,652 INFO L225 Difference]: With dead ends: 554 [2023-11-26 12:01:02,652 INFO L226 Difference]: Without dead ends: 379 [2023-11-26 12:01:02,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 873 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2023-11-26 12:01:02,654 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 185 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:02,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 395 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 12:01:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-26 12:01:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 363. [2023-11-26 12:01:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 202 states have (on average 1.2673267326732673) internal successors, (256), 203 states have internal predecessors, (256), 150 states have call successors, (150), 10 states have call predecessors, (150), 10 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-26 12:01:02,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 556 transitions. [2023-11-26 12:01:02,736 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 556 transitions. Word has length 441 [2023-11-26 12:01:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:02,737 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 556 transitions. [2023-11-26 12:01:02,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 2 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 2 states have call predecessors, (132), 2 states have call successors, (132) [2023-11-26 12:01:02,738 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 556 transitions. [2023-11-26 12:01:02,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-26 12:01:02,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:02,742 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:02,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:02,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:02,951 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:02,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:02,952 INFO L85 PathProgramCache]: Analyzing trace with hash 779351979, now seen corresponding path program 1 times [2023-11-26 12:01:02,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:02,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171841153] [2023-11-26 12:01:02,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:02,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:03,015 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:01:03,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476761618] [2023-11-26 12:01:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:03,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:03,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:03,017 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:03,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:01:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:03,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:01:03,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-26 12:01:04,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:01:04,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:04,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171841153] [2023-11-26 12:01:04,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:01:04,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476761618] [2023-11-26 12:01:04,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476761618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:04,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:04,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:01:04,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160993779] [2023-11-26 12:01:04,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:04,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:01:04,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:04,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:01:04,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:01:04,886 INFO L87 Difference]: Start difference. First operand 363 states and 556 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-26 12:01:05,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:05,243 INFO L93 Difference]: Finished difference Result 721 states and 1102 transitions. [2023-11-26 12:01:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:01:05,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 441 [2023-11-26 12:01:05,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:05,248 INFO L225 Difference]: With dead ends: 721 [2023-11-26 12:01:05,249 INFO L226 Difference]: Without dead ends: 365 [2023-11-26 12:01:05,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:01:05,251 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 110 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:05,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 604 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:01:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-11-26 12:01:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 363. [2023-11-26 12:01:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 202 states have (on average 1.2623762376237624) internal successors, (255), 203 states have internal predecessors, (255), 150 states have call successors, (150), 10 states have call predecessors, (150), 10 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-26 12:01:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 555 transitions. [2023-11-26 12:01:05,345 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 555 transitions. Word has length 441 [2023-11-26 12:01:05,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:05,346 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 555 transitions. [2023-11-26 12:01:05,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-26 12:01:05,347 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 555 transitions. [2023-11-26 12:01:05,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-11-26 12:01:05,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:05,351 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:05,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:05,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:05,552 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:05,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:05,553 INFO L85 PathProgramCache]: Analyzing trace with hash 200294282, now seen corresponding path program 1 times [2023-11-26 12:01:05,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:05,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777440953] [2023-11-26 12:01:05,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:05,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:05,612 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:01:05,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321507220] [2023-11-26 12:01:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:05,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:05,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:05,614 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:05,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:01:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:05,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:01:05,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-26 12:01:05,998 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:01:05,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:05,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777440953] [2023-11-26 12:01:05,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:01:05,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321507220] [2023-11-26 12:01:05,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321507220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:05,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:05,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:01:06,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475517460] [2023-11-26 12:01:06,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:06,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:06,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:06,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:06,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:01:06,002 INFO L87 Difference]: Start difference. First operand 363 states and 555 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-26 12:01:06,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:06,060 INFO L93 Difference]: Finished difference Result 719 states and 1099 transitions. [2023-11-26 12:01:06,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:06,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 442 [2023-11-26 12:01:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:06,065 INFO L225 Difference]: With dead ends: 719 [2023-11-26 12:01:06,065 INFO L226 Difference]: Without dead ends: 363 [2023-11-26 12:01:06,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:01:06,067 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 16 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:06,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 496 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:01:06,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-11-26 12:01:06,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2023-11-26 12:01:06,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 202 states have (on average 1.2524752475247525) internal successors, (253), 203 states have internal predecessors, (253), 150 states have call successors, (150), 10 states have call predecessors, (150), 10 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-26 12:01:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 553 transitions. [2023-11-26 12:01:06,165 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 553 transitions. Word has length 442 [2023-11-26 12:01:06,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:06,166 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 553 transitions. [2023-11-26 12:01:06,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-26 12:01:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 553 transitions. [2023-11-26 12:01:06,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-11-26 12:01:06,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:06,171 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:06,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:06,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 12:01:06,379 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:06,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:06,380 INFO L85 PathProgramCache]: Analyzing trace with hash 458459720, now seen corresponding path program 1 times [2023-11-26 12:01:06,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:06,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203170257] [2023-11-26 12:01:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:06,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:06,449 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:01:06,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042972970] [2023-11-26 12:01:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:06,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:06,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:06,457 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:06,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 12:01:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:06,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 12:01:06,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 7431 proven. 249 refuted. 0 times theorem prover too weak. 2832 trivial. 0 not checked. [2023-11-26 12:01:09,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 381 proven. 258 refuted. 0 times theorem prover too weak. 9873 trivial. 0 not checked. [2023-11-26 12:01:13,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:13,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203170257] [2023-11-26 12:01:13,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:01:13,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042972970] [2023-11-26 12:01:13,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042972970] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:13,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:01:13,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2023-11-26 12:01:13,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792690657] [2023-11-26 12:01:13,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:13,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-26 12:01:13,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:13,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-26 12:01:13,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2023-11-26 12:01:13,460 INFO L87 Difference]: Start difference. First operand 363 states and 553 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 9 states have call successors, (119), 5 states have call predecessors, (119), 10 states have return successors, (119), 9 states have call predecessors, (119), 9 states have call successors, (119) [2023-11-26 12:01:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:22,346 INFO L93 Difference]: Finished difference Result 2065 states and 2993 transitions. [2023-11-26 12:01:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-26 12:01:22,348 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 9 states have call successors, (119), 5 states have call predecessors, (119), 10 states have return successors, (119), 9 states have call predecessors, (119), 9 states have call successors, (119) Word has length 442 [2023-11-26 12:01:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:22,362 INFO L225 Difference]: With dead ends: 2065 [2023-11-26 12:01:22,362 INFO L226 Difference]: Without dead ends: 1709 [2023-11-26 12:01:22,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2269 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1952, Invalid=5704, Unknown=0, NotChecked=0, Total=7656 [2023-11-26 12:01:22,369 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 1790 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 2846 mSolverCounterSat, 1821 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1829 SdHoareTripleChecker+Valid, 1652 SdHoareTripleChecker+Invalid, 4667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1821 IncrementalHoareTripleChecker+Valid, 2846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:22,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1829 Valid, 1652 Invalid, 4667 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1821 Valid, 2846 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-11-26 12:01:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2023-11-26 12:01:22,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 994. [2023-11-26 12:01:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 591 states have (on average 1.257191201353638) internal successors, (743), 597 states have internal predecessors, (743), 366 states have call successors, (366), 36 states have call predecessors, (366), 36 states have return successors, (366), 360 states have call predecessors, (366), 366 states have call successors, (366) [2023-11-26 12:01:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1475 transitions. [2023-11-26 12:01:22,629 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1475 transitions. Word has length 442 [2023-11-26 12:01:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:22,630 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 1475 transitions. [2023-11-26 12:01:22,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 9 states have call successors, (119), 5 states have call predecessors, (119), 10 states have return successors, (119), 9 states have call predecessors, (119), 9 states have call successors, (119) [2023-11-26 12:01:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1475 transitions. [2023-11-26 12:01:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-11-26 12:01:22,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:22,635 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:22,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-26 12:01:22,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:22,838 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:22,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:22,839 INFO L85 PathProgramCache]: Analyzing trace with hash 677314438, now seen corresponding path program 1 times [2023-11-26 12:01:22,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:22,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345768107] [2023-11-26 12:01:22,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:22,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:22,947 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:01:22,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67799344] [2023-11-26 12:01:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:22,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:22,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:22,952 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:22,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c74bf8e-2f52-4ae0-9d2c-410af0a779df/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 12:01:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:23,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-26 12:01:23,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 7354 proven. 375 refuted. 0 times theorem prover too weak. 2783 trivial. 0 not checked. [2023-11-26 12:01:26,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 381 proven. 258 refuted. 0 times theorem prover too weak. 9873 trivial. 0 not checked. [2023-11-26 12:01:32,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:32,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345768107] [2023-11-26 12:01:32,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:01:32,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67799344] [2023-11-26 12:01:32,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67799344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:32,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:01:32,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 38 [2023-11-26 12:01:32,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600321684] [2023-11-26 12:01:32,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:32,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-26 12:01:32,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:32,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-26 12:01:32,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2023-11-26 12:01:32,340 INFO L87 Difference]: Start difference. First operand 994 states and 1475 transitions. Second operand has 38 states, 38 states have (on average 4.0) internal successors, (152), 38 states have internal predecessors, (152), 9 states have call successors, (119), 6 states have call predecessors, (119), 11 states have return successors, (119), 8 states have call predecessors, (119), 9 states have call successors, (119)