./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-18.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/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_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-18.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/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_84a100c4-7de0-4661-9fbb-21d88f3984c3/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 98bf3444bfc42ab115e7d067c3886787abe4ff198c81ac1a9dcc062a708c7968 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:42:09,997 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:42:10,104 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:42:10,109 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:42:10,110 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:42:10,159 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:42:10,161 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:42:10,162 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:42:10,163 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:42:10,169 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:42:10,169 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:42:10,170 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:42:10,171 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:42:10,173 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:42:10,174 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:42:10,174 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:42:10,175 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:42:10,175 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:42:10,176 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:42:10,176 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:42:10,177 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:42:10,177 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:42:10,178 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:42:10,178 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:42:10,179 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:42:10,179 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:42:10,180 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:42:10,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:42:10,181 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:42:10,182 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:42:10,183 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:42:10,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:42:10,184 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:42:10,184 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:42:10,184 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:42:10,185 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:42:10,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:42:10,186 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:42:10,186 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:42:10,186 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:42:10,187 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:42:10,187 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:42:10,187 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_84a100c4-7de0-4661-9fbb-21d88f3984c3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98bf3444bfc42ab115e7d067c3886787abe4ff198c81ac1a9dcc062a708c7968 [2023-11-26 10:42:10,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:42:10,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:42:10,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:42:10,546 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:42:10,547 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:42:10,548 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-18.i [2023-11-26 10:42:13,745 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:42:14,055 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:42:14,056 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-18.i [2023-11-26 10:42:14,074 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/data/57c59140e/066beee37c92469293bdc0d0e587093f/FLAGda194dcf5 [2023-11-26 10:42:14,089 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/data/57c59140e/066beee37c92469293bdc0d0e587093f [2023-11-26 10:42:14,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:42:14,099 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:42:14,101 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:42:14,102 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:42:14,116 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:42:14,117 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:42:14" (1/1) ... [2023-11-26 10:42:14,118 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa8c33a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14, skipping insertion in model container [2023-11-26 10:42:14,119 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:42:14" (1/1) ... [2023-11-26 10:42:14,179 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:42:14,352 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_84a100c4-7de0-4661-9fbb-21d88f3984c3/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-18.i[916,929] [2023-11-26 10:42:14,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:42:14,650 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:42:14,663 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_84a100c4-7de0-4661-9fbb-21d88f3984c3/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-18.i[916,929] [2023-11-26 10:42:14,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:42:14,801 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:42:14,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14 WrapperNode [2023-11-26 10:42:14,807 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:42:14,808 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:42:14,808 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:42:14,808 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:42:14,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14" (1/1) ... [2023-11-26 10:42:14,844 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14" (1/1) ... [2023-11-26 10:42:14,955 INFO L138 Inliner]: procedures = 26, calls = 104, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 863 [2023-11-26 10:42:14,956 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:42:14,956 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:42:14,957 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:42:14,957 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:42:14,972 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14" (1/1) ... [2023-11-26 10:42:14,973 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14" (1/1) ... [2023-11-26 10:42:14,985 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14" (1/1) ... [2023-11-26 10:42:15,047 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 10:42:15,047 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14" (1/1) ... [2023-11-26 10:42:15,047 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14" (1/1) ... [2023-11-26 10:42:15,091 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14" (1/1) ... [2023-11-26 10:42:15,099 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14" (1/1) ... [2023-11-26 10:42:15,123 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14" (1/1) ... [2023-11-26 10:42:15,137 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14" (1/1) ... [2023-11-26 10:42:15,165 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:42:15,167 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:42:15,167 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:42:15,167 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:42:15,168 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14" (1/1) ... [2023-11-26 10:42:15,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:42:15,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:15,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:42:15,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:42:15,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:42:15,247 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:42:15,248 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:42:15,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:42:15,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:42:15,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:42:15,450 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:42:15,452 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:42:16,801 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:42:16,864 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:42:16,864 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:42:16,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:42:16 BoogieIcfgContainer [2023-11-26 10:42:16,865 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:42:16,867 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:42:16,868 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:42:16,871 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:42:16,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:42:14" (1/3) ... [2023-11-26 10:42:16,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726f3117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:42:16, skipping insertion in model container [2023-11-26 10:42:16,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:14" (2/3) ... [2023-11-26 10:42:16,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726f3117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:42:16, skipping insertion in model container [2023-11-26 10:42:16,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:42:16" (3/3) ... [2023-11-26 10:42:16,874 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-18.i [2023-11-26 10:42:16,893 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:42:16,893 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:42:16,954 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:42:16,962 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;@27d21422, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:42:16,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:42:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 319 states, 225 states have (on average 1.6666666666666667) internal successors, (375), 226 states have internal predecessors, (375), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-26 10:42:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-26 10:42:17,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:17,011 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:17,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:17,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2128822212, now seen corresponding path program 1 times [2023-11-26 10:42:17,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:17,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221786670] [2023-11-26 10:42:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:17,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:17,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:17,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221786670] [2023-11-26 10:42:17,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:42:17,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237984533] [2023-11-26 10:42:17,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:17,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:17,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:17,493 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:17,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:42:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:17,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:42:18,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 16200 trivial. 0 not checked. [2023-11-26 10:42:18,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:18,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237984533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:18,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:18,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:18,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965559597] [2023-11-26 10:42:18,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:18,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:42:18,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:18,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:42:18,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:42:18,182 INFO L87 Difference]: Start difference. First operand has 319 states, 225 states have (on average 1.6666666666666667) internal successors, (375), 226 states have internal predecessors, (375), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 77.0) internal successors, (154), 2 states have internal predecessors, (154), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) [2023-11-26 10:42:18,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:18,270 INFO L93 Difference]: Finished difference Result 635 states and 1203 transitions. [2023-11-26 10:42:18,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:42:18,273 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 77.0) internal successors, (154), 2 states have internal predecessors, (154), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) Word has length 604 [2023-11-26 10:42:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:18,287 INFO L225 Difference]: With dead ends: 635 [2023-11-26 10:42:18,287 INFO L226 Difference]: Without dead ends: 317 [2023-11-26 10:42:18,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 603 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 10:42:18,297 INFO L413 NwaCegarLoop]: 548 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, 548 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 10:42:18,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 548 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:18,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-26 10:42:18,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2023-11-26 10:42:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 224 states have (on average 1.6473214285714286) internal successors, (369), 224 states have internal predecessors, (369), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-26 10:42:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 551 transitions. [2023-11-26 10:42:18,414 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 551 transitions. Word has length 604 [2023-11-26 10:42:18,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:18,415 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 551 transitions. [2023-11-26 10:42:18,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 77.0) internal successors, (154), 2 states have internal predecessors, (154), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) [2023-11-26 10:42:18,416 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 551 transitions. [2023-11-26 10:42:18,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-26 10:42:18,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:18,431 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:18,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:18,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:18,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:18,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:18,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1752926014, now seen corresponding path program 1 times [2023-11-26 10:42:18,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:18,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073955381] [2023-11-26 10:42:18,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:18,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:18,843 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:18,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316312555] [2023-11-26 10:42:18,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:18,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:18,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:18,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:18,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:42:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:19,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:42:19,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-26 10:42:19,748 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:19,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:19,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073955381] [2023-11-26 10:42:19,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:19,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316312555] [2023-11-26 10:42:19,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316312555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:19,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:19,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:42:19,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086576526] [2023-11-26 10:42:19,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:19,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:42:19,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:19,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:42:19,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:19,754 INFO L87 Difference]: Start difference. First operand 317 states and 551 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:20,086 INFO L93 Difference]: Finished difference Result 944 states and 1652 transitions. [2023-11-26 10:42:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:42:20,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 604 [2023-11-26 10:42:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:20,106 INFO L225 Difference]: With dead ends: 944 [2023-11-26 10:42:20,106 INFO L226 Difference]: Without dead ends: 628 [2023-11-26 10:42:20,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:20,111 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 556 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:20,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 1438 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:42:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2023-11-26 10:42:20,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 561. [2023-11-26 10:42:20,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 450 states have (on average 1.731111111111111) internal successors, (779), 451 states have internal predecessors, (779), 108 states have call successors, (108), 2 states have call predecessors, (108), 2 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-26 10:42:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 995 transitions. [2023-11-26 10:42:20,213 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 995 transitions. Word has length 604 [2023-11-26 10:42:20,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:20,219 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 995 transitions. [2023-11-26 10:42:20,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:20,220 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 995 transitions. [2023-11-26 10:42:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-26 10:42:20,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:20,241 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:20,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:20,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:20,450 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:20,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:20,451 INFO L85 PathProgramCache]: Analyzing trace with hash -447519748, now seen corresponding path program 1 times [2023-11-26 10:42:20,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:20,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706065215] [2023-11-26 10:42:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:20,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:20,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:20,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836069213] [2023-11-26 10:42:20,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:20,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:20,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:20,573 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:20,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:42:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:21,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 1419 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:42:21,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-26 10:42:21,190 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:21,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:21,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706065215] [2023-11-26 10:42:21,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:21,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836069213] [2023-11-26 10:42:21,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836069213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:21,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:21,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:21,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126126600] [2023-11-26 10:42:21,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:21,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:21,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:21,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:21,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:21,196 INFO L87 Difference]: Start difference. First operand 561 states and 995 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:21,291 INFO L93 Difference]: Finished difference Result 1554 states and 2767 transitions. [2023-11-26 10:42:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:21,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 604 [2023-11-26 10:42:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:21,303 INFO L225 Difference]: With dead ends: 1554 [2023-11-26 10:42:21,303 INFO L226 Difference]: Without dead ends: 994 [2023-11-26 10:42:21,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 10:42:21,307 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 356 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:21,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1316 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:21,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2023-11-26 10:42:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 991. [2023-11-26 10:42:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 836 states have (on average 1.7547846889952152) internal successors, (1467), 839 states have internal predecessors, (1467), 150 states have call successors, (150), 4 states have call predecessors, (150), 4 states have return successors, (150), 147 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-26 10:42:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1767 transitions. [2023-11-26 10:42:21,385 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1767 transitions. Word has length 604 [2023-11-26 10:42:21,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:21,387 INFO L495 AbstractCegarLoop]: Abstraction has 991 states and 1767 transitions. [2023-11-26 10:42:21,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1767 transitions. [2023-11-26 10:42:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-26 10:42:21,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:21,407 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:21,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:21,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-26 10:42:21,617 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:21,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:21,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1429543482, now seen corresponding path program 1 times [2023-11-26 10:42:21,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:21,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152393434] [2023-11-26 10:42:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:21,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:21,760 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:21,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690985078] [2023-11-26 10:42:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:21,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:21,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:21,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:21,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:42:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:22,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 1417 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:42:22,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-26 10:42:23,287 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:23,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:23,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152393434] [2023-11-26 10:42:23,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:23,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690985078] [2023-11-26 10:42:23,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690985078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:23,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:23,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:23,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311206722] [2023-11-26 10:42:23,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:23,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:23,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:23,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:23,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:23,293 INFO L87 Difference]: Start difference. First operand 991 states and 1767 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:23,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:23,403 INFO L93 Difference]: Finished difference Result 2953 states and 5270 transitions. [2023-11-26 10:42:23,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:23,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 604 [2023-11-26 10:42:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:23,423 INFO L225 Difference]: With dead ends: 2953 [2023-11-26 10:42:23,423 INFO L226 Difference]: Without dead ends: 1963 [2023-11-26 10:42:23,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 10:42:23,429 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 274 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:23,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1107 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2023-11-26 10:42:23,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1961. [2023-11-26 10:42:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1652 states have (on average 1.7548426150121066) internal successors, (2899), 1658 states have internal predecessors, (2899), 300 states have call successors, (300), 8 states have call predecessors, (300), 8 states have return successors, (300), 294 states have call predecessors, (300), 300 states have call successors, (300) [2023-11-26 10:42:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3499 transitions. [2023-11-26 10:42:23,714 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3499 transitions. Word has length 604 [2023-11-26 10:42:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:23,715 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 3499 transitions. [2023-11-26 10:42:23,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:23,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3499 transitions. [2023-11-26 10:42:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-26 10:42:23,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:23,725 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:23,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:23,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:23,934 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:23,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1990243260, now seen corresponding path program 1 times [2023-11-26 10:42:23,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:23,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305952677] [2023-11-26 10:42:23,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:23,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:24,020 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:24,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867656825] [2023-11-26 10:42:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:24,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:24,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:24,022 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:24,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:42:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:24,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:42:24,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-26 10:42:24,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:24,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:24,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305952677] [2023-11-26 10:42:24,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:24,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867656825] [2023-11-26 10:42:24,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867656825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:24,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:24,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:24,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510913408] [2023-11-26 10:42:24,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:24,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:24,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:24,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:24,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:24,572 INFO L87 Difference]: Start difference. First operand 1961 states and 3499 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:24,819 INFO L93 Difference]: Finished difference Result 5843 states and 10419 transitions. [2023-11-26 10:42:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:24,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 604 [2023-11-26 10:42:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:24,851 INFO L225 Difference]: With dead ends: 5843 [2023-11-26 10:42:24,851 INFO L226 Difference]: Without dead ends: 3883 [2023-11-26 10:42:24,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 10:42:24,859 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 532 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:24,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1069 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3883 states. [2023-11-26 10:42:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3883 to 3881. [2023-11-26 10:42:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3881 states, 3264 states have (on average 1.7389705882352942) internal successors, (5676), 3276 states have internal predecessors, (5676), 600 states have call successors, (600), 16 states have call predecessors, (600), 16 states have return successors, (600), 588 states have call predecessors, (600), 600 states have call successors, (600) [2023-11-26 10:42:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3881 states to 3881 states and 6876 transitions. [2023-11-26 10:42:25,259 INFO L78 Accepts]: Start accepts. Automaton has 3881 states and 6876 transitions. Word has length 604 [2023-11-26 10:42:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:25,261 INFO L495 AbstractCegarLoop]: Abstraction has 3881 states and 6876 transitions. [2023-11-26 10:42:25,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:25,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3881 states and 6876 transitions. [2023-11-26 10:42:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2023-11-26 10:42:25,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:25,273 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:25,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:25,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:25,482 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:25,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:25,483 INFO L85 PathProgramCache]: Analyzing trace with hash 296072019, now seen corresponding path program 1 times [2023-11-26 10:42:25,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:25,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338756024] [2023-11-26 10:42:25,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:25,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:25,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:25,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723253759] [2023-11-26 10:42:25,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:25,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:25,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:25,588 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:25,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:42:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:26,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 1419 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:42:26,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-26 10:42:26,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:26,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:26,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338756024] [2023-11-26 10:42:26,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:26,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723253759] [2023-11-26 10:42:26,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723253759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:26,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:26,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:26,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606151911] [2023-11-26 10:42:26,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:26,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:26,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:26,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:26,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:26,110 INFO L87 Difference]: Start difference. First operand 3881 states and 6876 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:26,412 INFO L93 Difference]: Finished difference Result 10833 states and 19082 transitions. [2023-11-26 10:42:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:26,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 605 [2023-11-26 10:42:26,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:26,462 INFO L225 Difference]: With dead ends: 10833 [2023-11-26 10:42:26,463 INFO L226 Difference]: Without dead ends: 6953 [2023-11-26 10:42:26,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 603 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 10:42:26,474 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 523 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:26,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1233 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:26,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6953 states. [2023-11-26 10:42:27,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6953 to 6951. [2023-11-26 10:42:27,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6951 states, 5718 states have (on average 1.70863938440014) internal successors, (9770), 5742 states have internal predecessors, (9770), 1200 states have call successors, (1200), 32 states have call predecessors, (1200), 32 states have return successors, (1200), 1176 states have call predecessors, (1200), 1200 states have call successors, (1200) [2023-11-26 10:42:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6951 states to 6951 states and 12170 transitions. [2023-11-26 10:42:27,402 INFO L78 Accepts]: Start accepts. Automaton has 6951 states and 12170 transitions. Word has length 605 [2023-11-26 10:42:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:27,404 INFO L495 AbstractCegarLoop]: Abstraction has 6951 states and 12170 transitions. [2023-11-26 10:42:27,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6951 states and 12170 transitions. [2023-11-26 10:42:27,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2023-11-26 10:42:27,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:27,426 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:27,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:27,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:27,636 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:27,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:27,637 INFO L85 PathProgramCache]: Analyzing trace with hash -724996335, now seen corresponding path program 1 times [2023-11-26 10:42:27,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:27,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253255616] [2023-11-26 10:42:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:27,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:27,721 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:27,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173212216] [2023-11-26 10:42:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:27,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:27,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:27,723 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:27,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:42:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:28,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:42:28,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 6874 proven. 78 refuted. 0 times theorem prover too weak. 9428 trivial. 0 not checked. [2023-11-26 10:42:28,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:42:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 192 proven. 78 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-11-26 10:42:29,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:29,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253255616] [2023-11-26 10:42:29,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:29,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173212216] [2023-11-26 10:42:29,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173212216] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:42:29,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:42:29,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 10:42:29,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602658179] [2023-11-26 10:42:29,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:42:29,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:42:29,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:29,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:42:29,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:42:29,222 INFO L87 Difference]: Start difference. First operand 6951 states and 12170 transitions. Second operand has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2023-11-26 10:42:30,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:30,235 INFO L93 Difference]: Finished difference Result 13997 states and 24427 transitions. [2023-11-26 10:42:30,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:42:30,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) Word has length 605 [2023-11-26 10:42:30,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:30,286 INFO L225 Difference]: With dead ends: 13997 [2023-11-26 10:42:30,286 INFO L226 Difference]: Without dead ends: 7047 [2023-11-26 10:42:30,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1212 GetRequests, 1202 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 10:42:30,305 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 364 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:30,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 1149 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:42:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7047 states. [2023-11-26 10:42:31,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7047 to 6983. [2023-11-26 10:42:31,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6983 states, 5742 states have (on average 1.699407871821665) internal successors, (9758), 5766 states have internal predecessors, (9758), 1200 states have call successors, (1200), 40 states have call predecessors, (1200), 40 states have return successors, (1200), 1176 states have call predecessors, (1200), 1200 states have call successors, (1200) [2023-11-26 10:42:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6983 states to 6983 states and 12158 transitions. [2023-11-26 10:42:31,098 INFO L78 Accepts]: Start accepts. Automaton has 6983 states and 12158 transitions. Word has length 605 [2023-11-26 10:42:31,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:31,100 INFO L495 AbstractCegarLoop]: Abstraction has 6983 states and 12158 transitions. [2023-11-26 10:42:31,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2023-11-26 10:42:31,101 INFO L276 IsEmpty]: Start isEmpty. Operand 6983 states and 12158 transitions. [2023-11-26 10:42:31,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2023-11-26 10:42:31,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:31,117 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:31,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:31,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:31,326 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:31,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:31,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1232027383, now seen corresponding path program 1 times [2023-11-26 10:42:31,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:31,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555339373] [2023-11-26 10:42:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:31,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:31,413 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:31,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376705125] [2023-11-26 10:42:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:31,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:31,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:31,415 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:31,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:42:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:31,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:42:32,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-26 10:42:34,030 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:34,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:34,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555339373] [2023-11-26 10:42:34,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:34,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376705125] [2023-11-26 10:42:34,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376705125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:34,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:34,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:42:34,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588437270] [2023-11-26 10:42:34,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:34,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:42:34,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:34,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:42:34,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:42:34,035 INFO L87 Difference]: Start difference. First operand 6983 states and 12158 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:36,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:36,208 INFO L93 Difference]: Finished difference Result 25145 states and 43722 transitions. [2023-11-26 10:42:36,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:42:36,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 607 [2023-11-26 10:42:36,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:36,279 INFO L225 Difference]: With dead ends: 25145 [2023-11-26 10:42:36,279 INFO L226 Difference]: Without dead ends: 18163 [2023-11-26 10:42:36,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:42:36,302 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 1392 mSDsluCounter, 1835 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1392 SdHoareTripleChecker+Valid, 2514 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:36,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1392 Valid, 2514 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 10:42:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18163 states. [2023-11-26 10:42:37,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18163 to 15113. [2023-11-26 10:42:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15113 states, 12632 states have (on average 1.7124762507916402) internal successors, (21632), 12680 states have internal predecessors, (21632), 2400 states have call successors, (2400), 80 states have call predecessors, (2400), 80 states have return successors, (2400), 2352 states have call predecessors, (2400), 2400 states have call successors, (2400) [2023-11-26 10:42:37,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15113 states to 15113 states and 26432 transitions. [2023-11-26 10:42:37,872 INFO L78 Accepts]: Start accepts. Automaton has 15113 states and 26432 transitions. Word has length 607 [2023-11-26 10:42:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:37,873 INFO L495 AbstractCegarLoop]: Abstraction has 15113 states and 26432 transitions. [2023-11-26 10:42:37,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 15113 states and 26432 transitions. [2023-11-26 10:42:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2023-11-26 10:42:37,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:37,895 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:37,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:38,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:38,106 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:38,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:38,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2068219523, now seen corresponding path program 1 times [2023-11-26 10:42:38,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:38,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276338560] [2023-11-26 10:42:38,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:38,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:38,317 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:38,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101863353] [2023-11-26 10:42:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:38,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:38,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:38,320 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:38,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:42:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:38,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 1424 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:42:38,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-26 10:42:39,012 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:39,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:39,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276338560] [2023-11-26 10:42:39,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:39,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101863353] [2023-11-26 10:42:39,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101863353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:39,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:39,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:42:39,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613764778] [2023-11-26 10:42:39,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:39,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:42:39,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:39,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:42:39,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:39,021 INFO L87 Difference]: Start difference. First operand 15113 states and 26432 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:40,616 INFO L93 Difference]: Finished difference Result 36717 states and 63609 transitions. [2023-11-26 10:42:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:42:40,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 607 [2023-11-26 10:42:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:40,696 INFO L225 Difference]: With dead ends: 36717 [2023-11-26 10:42:40,697 INFO L226 Difference]: Without dead ends: 21605 [2023-11-26 10:42:40,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:40,740 INFO L413 NwaCegarLoop]: 763 mSDtfsCounter, 354 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:40,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 1460 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:42:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21605 states. [2023-11-26 10:42:42,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21605 to 21425. [2023-11-26 10:42:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21425 states, 17184 states have (on average 1.6671322160148976) internal successors, (28648), 17296 states have internal predecessors, (28648), 4096 states have call successors, (4096), 144 states have call predecessors, (4096), 144 states have return successors, (4096), 3984 states have call predecessors, (4096), 4096 states have call successors, (4096) [2023-11-26 10:42:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21425 states to 21425 states and 36840 transitions. [2023-11-26 10:42:42,819 INFO L78 Accepts]: Start accepts. Automaton has 21425 states and 36840 transitions. Word has length 607 [2023-11-26 10:42:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:42,820 INFO L495 AbstractCegarLoop]: Abstraction has 21425 states and 36840 transitions. [2023-11-26 10:42:42,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 21425 states and 36840 transitions. [2023-11-26 10:42:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2023-11-26 10:42:42,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:42,969 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:42,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:43,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:43,180 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:43,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:43,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1849364805, now seen corresponding path program 1 times [2023-11-26 10:42:43,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:43,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254615122] [2023-11-26 10:42:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:43,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:43,266 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:43,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169268737] [2023-11-26 10:42:43,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:43,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:43,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:43,269 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:43,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:42:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:43,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 1423 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:42:43,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 5088 proven. 219 refuted. 0 times theorem prover too weak. 11073 trivial. 0 not checked. [2023-11-26 10:42:44,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:42:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 51 proven. 219 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-11-26 10:42:45,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:45,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254615122] [2023-11-26 10:42:45,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:45,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169268737] [2023-11-26 10:42:45,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169268737] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:42:45,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:42:45,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:42:45,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050232265] [2023-11-26 10:42:45,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:42:45,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:42:45,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:45,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:42:45,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:42:45,182 INFO L87 Difference]: Start difference. First operand 21425 states and 36840 transitions. Second operand has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 2 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 2 states have call predecessors, (165), 2 states have call successors, (165) [2023-11-26 10:42:46,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:46,985 INFO L93 Difference]: Finished difference Result 35133 states and 59591 transitions. [2023-11-26 10:42:46,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:42:46,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 2 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 2 states have call predecessors, (165), 2 states have call successors, (165) Word has length 607 [2023-11-26 10:42:46,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:47,050 INFO L225 Difference]: With dead ends: 35133 [2023-11-26 10:42:47,050 INFO L226 Difference]: Without dead ends: 13709 [2023-11-26 10:42:47,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1216 GetRequests, 1206 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 10:42:47,098 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 335 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:47,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 1141 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:42:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13709 states. [2023-11-26 10:42:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13709 to 13453. [2023-11-26 10:42:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13453 states, 10236 states have (on average 1.6076592418913638) internal successors, (16456), 10284 states have internal predecessors, (16456), 3008 states have call successors, (3008), 208 states have call predecessors, (3008), 208 states have return successors, (3008), 2960 states have call predecessors, (3008), 3008 states have call successors, (3008) [2023-11-26 10:42:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13453 states to 13453 states and 22472 transitions. [2023-11-26 10:42:48,955 INFO L78 Accepts]: Start accepts. Automaton has 13453 states and 22472 transitions. Word has length 607 [2023-11-26 10:42:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:48,956 INFO L495 AbstractCegarLoop]: Abstraction has 13453 states and 22472 transitions. [2023-11-26 10:42:48,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 2 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 2 states have call predecessors, (165), 2 states have call successors, (165) [2023-11-26 10:42:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 13453 states and 22472 transitions. [2023-11-26 10:42:48,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-26 10:42:48,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:48,973 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:48,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-26 10:42:49,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 10:42:49,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:49,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:49,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1990709660, now seen corresponding path program 1 times [2023-11-26 10:42:49,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:49,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513307500] [2023-11-26 10:42:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:49,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:49,262 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:49,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680657919] [2023-11-26 10:42:49,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:49,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:49,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:49,264 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:49,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:42:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:49,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:42:49,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-26 10:42:49,975 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:49,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:49,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513307500] [2023-11-26 10:42:49,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:49,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680657919] [2023-11-26 10:42:49,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680657919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:49,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:49,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:42:49,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331237399] [2023-11-26 10:42:49,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:49,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:42:49,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:49,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:42:49,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:49,980 INFO L87 Difference]: Start difference. First operand 13453 states and 22472 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:51,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:51,984 INFO L93 Difference]: Finished difference Result 40357 states and 67414 transitions. [2023-11-26 10:42:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:42:51,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 608 [2023-11-26 10:42:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:52,079 INFO L225 Difference]: With dead ends: 40357 [2023-11-26 10:42:52,079 INFO L226 Difference]: Without dead ends: 26905 [2023-11-26 10:42:52,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 605 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:52,112 INFO L413 NwaCegarLoop]: 922 mSDtfsCounter, 1128 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:52,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1128 Valid, 1269 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:42:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26905 states. [2023-11-26 10:42:54,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26905 to 26903. [2023-11-26 10:42:54,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26903 states, 20470 states have (on average 1.6004885197850514) internal successors, (32762), 20566 states have internal predecessors, (32762), 6016 states have call successors, (6016), 416 states have call predecessors, (6016), 416 states have return successors, (6016), 5920 states have call predecessors, (6016), 6016 states have call successors, (6016) [2023-11-26 10:42:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26903 states to 26903 states and 44794 transitions. [2023-11-26 10:42:54,909 INFO L78 Accepts]: Start accepts. Automaton has 26903 states and 44794 transitions. Word has length 608 [2023-11-26 10:42:54,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:54,910 INFO L495 AbstractCegarLoop]: Abstraction has 26903 states and 44794 transitions. [2023-11-26 10:42:54,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:42:54,911 INFO L276 IsEmpty]: Start isEmpty. Operand 26903 states and 44794 transitions. [2023-11-26 10:42:54,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-26 10:42:54,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:54,932 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:42:54,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:55,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 10:42:55,149 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:55,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:55,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1573313054, now seen corresponding path program 1 times [2023-11-26 10:42:55,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:55,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628389328] [2023-11-26 10:42:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:55,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:55,228 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:55,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109325357] [2023-11-26 10:42:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:55,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:55,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:55,231 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:55,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84a100c4-7de0-4661-9fbb-21d88f3984c3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:42:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:55,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:42:55,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 7410 proven. 90 refuted. 0 times theorem prover too weak. 8880 trivial. 0 not checked. [2023-11-26 10:42:56,228 INFO L327 TraceCheckSpWp]: Computing backward predicates...