./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-89.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/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_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-89.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/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_075714dc-d0a2-4c78-897b-e24c01e5aa9e/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 41419c8efb751929a2942e28a7b04b7973ccf691a8ed1f9bfd2cb6f75faf12af --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:43:43,790 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:43:43,895 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:43:43,906 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:43:43,908 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:43:43,933 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:43:43,934 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:43:43,935 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:43:43,936 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:43:43,936 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:43:43,937 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:43:43,938 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:43:43,939 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:43:43,939 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:43:43,940 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:43:43,940 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:43:43,941 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:43:43,942 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:43:43,942 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:43:43,943 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:43:43,944 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:43:43,944 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:43:43,945 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:43:43,946 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:43:43,946 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:43:43,947 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:43:43,948 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:43:43,948 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:43:43,949 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:43:43,949 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:43:43,950 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:43:43,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:43:43,951 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:43:43,951 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:43:43,952 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:43:43,952 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:43:43,953 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:43:43,953 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:43:43,954 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:43:43,954 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:43:43,955 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:43:43,958 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:43:43,958 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_075714dc-d0a2-4c78-897b-e24c01e5aa9e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41419c8efb751929a2942e28a7b04b7973ccf691a8ed1f9bfd2cb6f75faf12af [2023-11-26 11:43:44,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:43:44,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:43:44,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:43:44,251 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:43:44,252 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:43:44,253 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-89.i [2023-11-26 11:43:47,374 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:43:47,701 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:43:47,702 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-89.i [2023-11-26 11:43:47,719 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/data/e0704c791/acfcfe04f1224d24a0827f5caafe209f/FLAG8508b6819 [2023-11-26 11:43:47,742 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/data/e0704c791/acfcfe04f1224d24a0827f5caafe209f [2023-11-26 11:43:47,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:43:47,748 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:43:47,751 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:43:47,752 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:43:47,757 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:43:47,758 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,759 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c78697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47, skipping insertion in model container [2023-11-26 11:43:47,760 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,828 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:43:48,009 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_075714dc-d0a2-4c78-897b-e24c01e5aa9e/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-89.i[916,929] [2023-11-26 11:43:48,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:43:48,258 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:43:48,272 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_075714dc-d0a2-4c78-897b-e24c01e5aa9e/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-89.i[916,929] [2023-11-26 11:43:48,414 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:43:48,448 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:43:48,448 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48 WrapperNode [2023-11-26 11:43:48,449 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:43:48,451 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:43:48,451 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:43:48,452 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:43:48,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,513 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,660 INFO L138 Inliner]: procedures = 26, calls = 108, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 759 [2023-11-26 11:43:48,661 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:43:48,662 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:43:48,662 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:43:48,662 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:43:48,675 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,698 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,761 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 11:43:48,762 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,762 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,825 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,849 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,866 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,916 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:43:48,918 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:43:48,918 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:43:48,918 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:43:48,920 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:43:48,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:48,954 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:43:48,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:43:48,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:43:48,990 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:43:48,990 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:43:48,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:43:48,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:43:48,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:43:49,146 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:43:49,148 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:43:50,629 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:43:50,736 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:43:50,736 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:43:50,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:43:50 BoogieIcfgContainer [2023-11-26 11:43:50,737 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:43:50,741 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:43:50,741 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:43:50,745 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:43:50,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:43:47" (1/3) ... [2023-11-26 11:43:50,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e186f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:43:50, skipping insertion in model container [2023-11-26 11:43:50,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (2/3) ... [2023-11-26 11:43:50,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e186f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:43:50, skipping insertion in model container [2023-11-26 11:43:50,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:43:50" (3/3) ... [2023-11-26 11:43:50,752 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-89.i [2023-11-26 11:43:50,773 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:43:50,773 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:43:50,858 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:43:50,865 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;@73a4b948, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:43:50,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:43:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 299 states, 201 states have (on average 1.6517412935323383) internal successors, (332), 202 states have internal predecessors, (332), 95 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-26 11:43:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2023-11-26 11:43:50,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:50,926 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:43:50,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:43:50,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:50,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1750643542, now seen corresponding path program 1 times [2023-11-26 11:43:50,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:50,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825667848] [2023-11-26 11:43:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:50,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:51,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:51,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825667848] [2023-11-26 11:43:51,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:43:51,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545931339] [2023-11-26 11:43:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:51,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:51,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:51,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:43:51,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:43:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:51,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:43:52,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 17672 trivial. 0 not checked. [2023-11-26 11:43:52,157 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:43:52,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545931339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:52,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:52,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:43:52,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225823395] [2023-11-26 11:43:52,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:52,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:43:52,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:52,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:43:52,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:43:52,208 INFO L87 Difference]: Start difference. First operand has 299 states, 201 states have (on average 1.6517412935323383) internal successors, (332), 202 states have internal predecessors, (332), 95 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 2 states have call successors, (95) [2023-11-26 11:43:52,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:52,304 INFO L93 Difference]: Finished difference Result 594 states and 1135 transitions. [2023-11-26 11:43:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:43:52,307 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 2 states have call successors, (95) Word has length 612 [2023-11-26 11:43:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:52,321 INFO L225 Difference]: With dead ends: 594 [2023-11-26 11:43:52,321 INFO L226 Difference]: Without dead ends: 296 [2023-11-26 11:43:52,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 611 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 11:43:52,334 INFO L413 NwaCegarLoop]: 510 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, 510 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 11:43:52,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 510 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:43:52,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-11-26 11:43:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2023-11-26 11:43:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 199 states have (on average 1.6231155778894473) internal successors, (323), 199 states have internal predecessors, (323), 95 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-26 11:43:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 513 transitions. [2023-11-26 11:43:52,431 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 513 transitions. Word has length 612 [2023-11-26 11:43:52,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:52,432 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 513 transitions. [2023-11-26 11:43:52,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 2 states have call successors, (95) [2023-11-26 11:43:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 513 transitions. [2023-11-26 11:43:52,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2023-11-26 11:43:52,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:52,454 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:43:52,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:43:52,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:52,667 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:43:52,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:52,668 INFO L85 PathProgramCache]: Analyzing trace with hash 770788734, now seen corresponding path program 1 times [2023-11-26 11:43:52,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:52,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555189542] [2023-11-26 11:43:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:52,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:52,901 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:43:52,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070355002] [2023-11-26 11:43:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:52,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:52,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:52,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:43:52,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:43:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:53,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:43:53,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-11-26 11:43:53,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:43:53,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:53,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555189542] [2023-11-26 11:43:53,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:43:53,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070355002] [2023-11-26 11:43:53,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070355002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:53,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:53,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:43:53,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046006001] [2023-11-26 11:43:53,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:53,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:43:53,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:53,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:43:53,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:43:53,527 INFO L87 Difference]: Start difference. First operand 296 states and 513 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:43:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:53,667 INFO L93 Difference]: Finished difference Result 759 states and 1322 transitions. [2023-11-26 11:43:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:43:53,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 612 [2023-11-26 11:43:53,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:53,678 INFO L225 Difference]: With dead ends: 759 [2023-11-26 11:43:53,678 INFO L226 Difference]: Without dead ends: 464 [2023-11-26 11:43:53,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 610 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 11:43:53,681 INFO L413 NwaCegarLoop]: 664 mSDtfsCounter, 285 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:53,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1154 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:43:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-11-26 11:43:53,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 461. [2023-11-26 11:43:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 331 states have (on average 1.6706948640483383) internal successors, (553), 332 states have internal predecessors, (553), 127 states have call successors, (127), 2 states have call predecessors, (127), 2 states have return successors, (127), 126 states have call predecessors, (127), 127 states have call successors, (127) [2023-11-26 11:43:53,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 807 transitions. [2023-11-26 11:43:53,754 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 807 transitions. Word has length 612 [2023-11-26 11:43:53,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:53,757 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 807 transitions. [2023-11-26 11:43:53,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:43:53,758 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 807 transitions. [2023-11-26 11:43:53,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2023-11-26 11:43:53,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:53,766 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:43:53,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:43:53,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:53,977 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:43:53,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:53,979 INFO L85 PathProgramCache]: Analyzing trace with hash -777841035, now seen corresponding path program 1 times [2023-11-26 11:43:53,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:53,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655858468] [2023-11-26 11:43:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:53,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:54,094 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:43:54,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525373040] [2023-11-26 11:43:54,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:54,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:54,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:54,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:43:54,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:43:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:54,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 1399 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:43:54,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-11-26 11:43:54,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:43:54,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:54,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655858468] [2023-11-26 11:43:54,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:43:54,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525373040] [2023-11-26 11:43:54,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525373040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:54,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:54,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:43:54,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475167869] [2023-11-26 11:43:54,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:54,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:43:54,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:54,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:43:54,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:43:54,698 INFO L87 Difference]: Start difference. First operand 461 states and 807 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:43:55,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:55,114 INFO L93 Difference]: Finished difference Result 2021 states and 3567 transitions. [2023-11-26 11:43:55,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:43:55,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 613 [2023-11-26 11:43:55,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:55,138 INFO L225 Difference]: With dead ends: 2021 [2023-11-26 11:43:55,139 INFO L226 Difference]: Without dead ends: 1561 [2023-11-26 11:43:55,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 611 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:43:55,145 INFO L413 NwaCegarLoop]: 1023 mSDtfsCounter, 1063 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:55,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1063 Valid, 2610 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:43:55,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2023-11-26 11:43:55,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1551. [2023-11-26 11:43:55,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1192 states have (on average 1.7030201342281879) internal successors, (2030), 1198 states have internal predecessors, (2030), 350 states have call successors, (350), 8 states have call predecessors, (350), 8 states have return successors, (350), 344 states have call predecessors, (350), 350 states have call successors, (350) [2023-11-26 11:43:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 2730 transitions. [2023-11-26 11:43:55,375 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 2730 transitions. Word has length 613 [2023-11-26 11:43:55,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:55,377 INFO L495 AbstractCegarLoop]: Abstraction has 1551 states and 2730 transitions. [2023-11-26 11:43:55,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:43:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 2730 transitions. [2023-11-26 11:43:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2023-11-26 11:43:55,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:55,394 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:43:55,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:43:55,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:55,612 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:43:55,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:55,614 INFO L85 PathProgramCache]: Analyzing trace with hash -839880649, now seen corresponding path program 1 times [2023-11-26 11:43:55,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:55,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803127931] [2023-11-26 11:43:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:55,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:55,753 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:43:55,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709084693] [2023-11-26 11:43:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:55,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:55,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:55,756 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:43:55,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:43:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:56,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:43:56,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-11-26 11:43:57,167 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:43:57,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:57,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803127931] [2023-11-26 11:43:57,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:43:57,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709084693] [2023-11-26 11:43:57,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709084693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:57,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:57,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:43:57,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733207722] [2023-11-26 11:43:57,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:57,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:43:57,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:57,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:43:57,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:43:57,172 INFO L87 Difference]: Start difference. First operand 1551 states and 2730 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:43:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:57,422 INFO L93 Difference]: Finished difference Result 4585 states and 8056 transitions. [2023-11-26 11:43:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:43:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 613 [2023-11-26 11:43:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:57,447 INFO L225 Difference]: With dead ends: 4585 [2023-11-26 11:43:57,448 INFO L226 Difference]: Without dead ends: 3035 [2023-11-26 11:43:57,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 611 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 11:43:57,462 INFO L413 NwaCegarLoop]: 738 mSDtfsCounter, 245 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:57,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1233 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:43:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2023-11-26 11:43:57,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 3031. [2023-11-26 11:43:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 2314 states have (on average 1.6888504753673292) internal successors, (3908), 2326 states have internal predecessors, (3908), 700 states have call successors, (700), 16 states have call predecessors, (700), 16 states have return successors, (700), 688 states have call predecessors, (700), 700 states have call successors, (700) [2023-11-26 11:43:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 5308 transitions. [2023-11-26 11:43:57,896 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 5308 transitions. Word has length 613 [2023-11-26 11:43:57,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:57,898 INFO L495 AbstractCegarLoop]: Abstraction has 3031 states and 5308 transitions. [2023-11-26 11:43:57,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:43:57,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 5308 transitions. [2023-11-26 11:43:57,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-26 11:43:57,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:57,910 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:43:57,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:43:58,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:58,119 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:43:58,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:58,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1739244783, now seen corresponding path program 1 times [2023-11-26 11:43:58,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:58,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580167254] [2023-11-26 11:43:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:58,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:58,203 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:43:58,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785547612] [2023-11-26 11:43:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:58,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:58,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:58,205 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:43:58,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:43:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:58,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:43:58,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-11-26 11:43:58,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:43:58,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:58,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580167254] [2023-11-26 11:43:58,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:43:58,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785547612] [2023-11-26 11:43:58,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785547612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:58,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:58,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:43:58,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312113853] [2023-11-26 11:43:58,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:58,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:43:58,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:43:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:43:58,724 INFO L87 Difference]: Start difference. First operand 3031 states and 5308 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:43:59,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:59,111 INFO L93 Difference]: Finished difference Result 9059 states and 15858 transitions. [2023-11-26 11:43:59,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:43:59,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 614 [2023-11-26 11:43:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:59,159 INFO L225 Difference]: With dead ends: 9059 [2023-11-26 11:43:59,159 INFO L226 Difference]: Without dead ends: 6029 [2023-11-26 11:43:59,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 612 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 11:43:59,171 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 503 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:59,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1007 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:43:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2023-11-26 11:43:59,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 5995. [2023-11-26 11:43:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5995 states, 4562 states have (on average 1.6742656729504604) internal successors, (7638), 4586 states have internal predecessors, (7638), 1400 states have call successors, (1400), 32 states have call predecessors, (1400), 32 states have return successors, (1400), 1376 states have call predecessors, (1400), 1400 states have call successors, (1400) [2023-11-26 11:43:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5995 states to 5995 states and 10438 transitions. [2023-11-26 11:43:59,949 INFO L78 Accepts]: Start accepts. Automaton has 5995 states and 10438 transitions. Word has length 614 [2023-11-26 11:43:59,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:59,951 INFO L495 AbstractCegarLoop]: Abstraction has 5995 states and 10438 transitions. [2023-11-26 11:43:59,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:43:59,952 INFO L276 IsEmpty]: Start isEmpty. Operand 5995 states and 10438 transitions. [2023-11-26 11:43:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-26 11:43:59,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:59,963 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:43:59,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:00,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:00,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:00,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:00,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1739304365, now seen corresponding path program 1 times [2023-11-26 11:44:00,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:00,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697829037] [2023-11-26 11:44:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:00,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:00,270 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:00,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587799439] [2023-11-26 11:44:00,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:00,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:00,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:00,272 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:00,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:44:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:00,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:44:00,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-11-26 11:44:00,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:00,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:00,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697829037] [2023-11-26 11:44:00,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:00,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587799439] [2023-11-26 11:44:00,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587799439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:00,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:00,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:44:00,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883596843] [2023-11-26 11:44:00,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:00,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:44:00,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:00,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:44:00,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:44:00,907 INFO L87 Difference]: Start difference. First operand 5995 states and 10438 transitions. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:44:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:02,926 INFO L93 Difference]: Finished difference Result 25765 states and 44564 transitions. [2023-11-26 11:44:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:44:02,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 614 [2023-11-26 11:44:02,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:03,043 INFO L225 Difference]: With dead ends: 25765 [2023-11-26 11:44:03,043 INFO L226 Difference]: Without dead ends: 19517 [2023-11-26 11:44:03,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:44:03,067 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 1682 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:03,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1682 Valid, 2120 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:44:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19517 states. [2023-11-26 11:44:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19517 to 19171. [2023-11-26 11:44:05,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19171 states, 14354 states have (on average 1.643583670057127) internal successors, (23592), 14466 states have internal predecessors, (23592), 4688 states have call successors, (4688), 128 states have call predecessors, (4688), 128 states have return successors, (4688), 4576 states have call predecessors, (4688), 4688 states have call successors, (4688) [2023-11-26 11:44:05,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19171 states to 19171 states and 32968 transitions. [2023-11-26 11:44:05,388 INFO L78 Accepts]: Start accepts. Automaton has 19171 states and 32968 transitions. Word has length 614 [2023-11-26 11:44:05,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:05,390 INFO L495 AbstractCegarLoop]: Abstraction has 19171 states and 32968 transitions. [2023-11-26 11:44:05,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:44:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 19171 states and 32968 transitions. [2023-11-26 11:44:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-26 11:44:05,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:05,410 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:05,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 11:44:05,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:05,630 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:05,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:05,631 INFO L85 PathProgramCache]: Analyzing trace with hash -955283287, now seen corresponding path program 1 times [2023-11-26 11:44:05,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:05,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100299486] [2023-11-26 11:44:05,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:05,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:05,730 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:05,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138570787] [2023-11-26 11:44:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:05,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:05,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:05,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:05,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:44:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:06,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:44:06,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-11-26 11:44:06,380 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:06,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:06,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100299486] [2023-11-26 11:44:06,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:06,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138570787] [2023-11-26 11:44:06,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138570787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:06,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:06,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:44:06,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009453329] [2023-11-26 11:44:06,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:06,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:06,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:06,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:06,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:06,385 INFO L87 Difference]: Start difference. First operand 19171 states and 32968 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:44:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:07,746 INFO L93 Difference]: Finished difference Result 37011 states and 63553 transitions. [2023-11-26 11:44:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:07,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 614 [2023-11-26 11:44:07,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:07,826 INFO L225 Difference]: With dead ends: 37011 [2023-11-26 11:44:07,826 INFO L226 Difference]: Without dead ends: 17841 [2023-11-26 11:44:07,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 611 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 11:44:07,893 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 695 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:07,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 1299 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:44:07,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17841 states. [2023-11-26 11:44:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17841 to 14991. [2023-11-26 11:44:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14991 states, 11710 states have (on average 1.662339880444065) internal successors, (19466), 11758 states have internal predecessors, (19466), 3152 states have call successors, (3152), 128 states have call predecessors, (3152), 128 states have return successors, (3152), 3104 states have call predecessors, (3152), 3152 states have call successors, (3152) [2023-11-26 11:44:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14991 states to 14991 states and 25770 transitions. [2023-11-26 11:44:09,848 INFO L78 Accepts]: Start accepts. Automaton has 14991 states and 25770 transitions. Word has length 614 [2023-11-26 11:44:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:09,850 INFO L495 AbstractCegarLoop]: Abstraction has 14991 states and 25770 transitions. [2023-11-26 11:44:09,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:44:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 14991 states and 25770 transitions. [2023-11-26 11:44:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-26 11:44:09,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:09,866 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:09,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:10,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:10,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:10,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:10,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1772931737, now seen corresponding path program 1 times [2023-11-26 11:44:10,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:10,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435861620] [2023-11-26 11:44:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:10,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:10,167 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:10,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744883450] [2023-11-26 11:44:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:10,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:10,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:10,169 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:10,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:44:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:10,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:44:10,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-11-26 11:44:13,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:13,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:13,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435861620] [2023-11-26 11:44:13,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:13,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744883450] [2023-11-26 11:44:13,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744883450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:13,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:13,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:13,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427170348] [2023-11-26 11:44:13,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:13,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:13,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:13,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:13,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:13,466 INFO L87 Difference]: Start difference. First operand 14991 states and 25770 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:44:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:14,447 INFO L93 Difference]: Finished difference Result 36577 states and 62752 transitions. [2023-11-26 11:44:14,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:14,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 614 [2023-11-26 11:44:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:14,533 INFO L225 Difference]: With dead ends: 36577 [2023-11-26 11:44:14,533 INFO L226 Difference]: Without dead ends: 21587 [2023-11-26 11:44:14,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 612 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 11:44:14,573 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 193 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:14,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1008 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:44:14,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21587 states. [2023-11-26 11:44:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21587 to 21085. [2023-11-26 11:44:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21085 states, 16164 states have (on average 1.6422296461271961) internal successors, (26545), 16236 states have internal predecessors, (26545), 4728 states have call successors, (4728), 192 states have call predecessors, (4728), 192 states have return successors, (4728), 4656 states have call predecessors, (4728), 4728 states have call successors, (4728) [2023-11-26 11:44:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21085 states to 21085 states and 36001 transitions. [2023-11-26 11:44:16,986 INFO L78 Accepts]: Start accepts. Automaton has 21085 states and 36001 transitions. Word has length 614 [2023-11-26 11:44:16,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:16,988 INFO L495 AbstractCegarLoop]: Abstraction has 21085 states and 36001 transitions. [2023-11-26 11:44:16,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:44:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 21085 states and 36001 transitions. [2023-11-26 11:44:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-26 11:44:17,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:17,010 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:17,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:17,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:17,221 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:17,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:17,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2012562469, now seen corresponding path program 1 times [2023-11-26 11:44:17,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:17,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743388019] [2023-11-26 11:44:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:17,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:17,311 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:17,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579419133] [2023-11-26 11:44:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:17,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:17,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:17,313 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:17,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:44:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:17,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:44:17,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 8094 proven. 186 refuted. 0 times theorem prover too weak. 9580 trivial. 0 not checked. [2023-11-26 11:44:18,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 96 proven. 186 refuted. 0 times theorem prover too weak. 17578 trivial. 0 not checked. [2023-11-26 11:44:19,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:19,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743388019] [2023-11-26 11:44:19,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:19,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579419133] [2023-11-26 11:44:19,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579419133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:19,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:44:19,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 11:44:19,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212674645] [2023-11-26 11:44:19,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:19,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:44:19,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:19,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:44:19,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:19,292 INFO L87 Difference]: Start difference. First operand 21085 states and 36001 transitions. Second operand has 8 states, 8 states have (on average 25.625) internal successors, (205), 8 states have internal predecessors, (205), 3 states have call successors, (157), 2 states have call predecessors, (157), 4 states have return successors, (158), 3 states have call predecessors, (158), 3 states have call successors, (158) [2023-11-26 11:44:20,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:20,873 INFO L93 Difference]: Finished difference Result 33983 states and 57373 transitions. [2023-11-26 11:44:20,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:44:20,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 25.625) internal successors, (205), 8 states have internal predecessors, (205), 3 states have call successors, (157), 2 states have call predecessors, (157), 4 states have return successors, (158), 3 states have call predecessors, (158), 3 states have call successors, (158) Word has length 614 [2023-11-26 11:44:20,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:20,934 INFO L225 Difference]: With dead ends: 33983 [2023-11-26 11:44:20,934 INFO L226 Difference]: Without dead ends: 12899 [2023-11-26 11:44:20,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1230 GetRequests, 1220 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 11:44:20,980 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 809 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:20,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 978 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:44:20,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12899 states. [2023-11-26 11:44:22,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12899 to 12611. [2023-11-26 11:44:22,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12611 states, 9226 states have (on average 1.5823758942120096) internal successors, (14599), 9250 states have internal predecessors, (14599), 3192 states have call successors, (3192), 192 states have call predecessors, (3192), 192 states have return successors, (3192), 3168 states have call predecessors, (3192), 3192 states have call successors, (3192) [2023-11-26 11:44:22,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12611 states to 12611 states and 20983 transitions. [2023-11-26 11:44:22,994 INFO L78 Accepts]: Start accepts. Automaton has 12611 states and 20983 transitions. Word has length 614 [2023-11-26 11:44:22,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:22,996 INFO L495 AbstractCegarLoop]: Abstraction has 12611 states and 20983 transitions. [2023-11-26 11:44:22,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.625) internal successors, (205), 8 states have internal predecessors, (205), 3 states have call successors, (157), 2 states have call predecessors, (157), 4 states have return successors, (158), 3 states have call predecessors, (158), 3 states have call successors, (158) [2023-11-26 11:44:22,997 INFO L276 IsEmpty]: Start isEmpty. Operand 12611 states and 20983 transitions. [2023-11-26 11:44:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-26 11:44:23,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:23,012 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:23,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:23,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:23,223 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:23,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:23,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1912932219, now seen corresponding path program 1 times [2023-11-26 11:44:23,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:23,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132950833] [2023-11-26 11:44:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:23,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:23,306 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:23,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052406799] [2023-11-26 11:44:23,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:23,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:23,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:23,308 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:23,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:44:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:23,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:44:23,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-11-26 11:44:24,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:24,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:24,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132950833] [2023-11-26 11:44:24,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:24,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052406799] [2023-11-26 11:44:24,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052406799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:24,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:24,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:44:24,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505117686] [2023-11-26 11:44:24,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:24,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:44:24,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:24,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:44:24,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:44:24,020 INFO L87 Difference]: Start difference. First operand 12611 states and 20983 transitions. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:44:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:25,780 INFO L93 Difference]: Finished difference Result 37434 states and 62397 transitions. [2023-11-26 11:44:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:44:25,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 614 [2023-11-26 11:44:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:25,876 INFO L225 Difference]: With dead ends: 37434 [2023-11-26 11:44:25,876 INFO L226 Difference]: Without dead ends: 24824 [2023-11-26 11:44:25,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 611 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:44:25,908 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 665 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:25,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 1715 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:44:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24824 states. [2023-11-26 11:44:27,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24824 to 20829. [2023-11-26 11:44:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20829 states, 16292 states have (on average 1.6255831082739995) internal successors, (26484), 16364 states have internal predecessors, (26484), 4248 states have call successors, (4248), 288 states have call predecessors, (4248), 288 states have return successors, (4248), 4176 states have call predecessors, (4248), 4248 states have call successors, (4248) [2023-11-26 11:44:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20829 states to 20829 states and 34980 transitions. [2023-11-26 11:44:27,701 INFO L78 Accepts]: Start accepts. Automaton has 20829 states and 34980 transitions. Word has length 614 [2023-11-26 11:44:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:27,703 INFO L495 AbstractCegarLoop]: Abstraction has 20829 states and 34980 transitions. [2023-11-26 11:44:27,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-26 11:44:27,703 INFO L276 IsEmpty]: Start isEmpty. Operand 20829 states and 34980 transitions. [2023-11-26 11:44:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-26 11:44:27,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:27,727 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:27,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:27,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:44:27,939 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:27,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:27,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1036913213, now seen corresponding path program 1 times [2023-11-26 11:44:27,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:27,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803553334] [2023-11-26 11:44:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:27,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:28,054 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:28,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285546142] [2023-11-26 11:44:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:28,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:28,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:28,057 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:28,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075714dc-d0a2-4c78-897b-e24c01e5aa9e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:44:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:28,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:44:28,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-11-26 11:44:28,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:28,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:28,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803553334] [2023-11-26 11:44:28,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:28,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285546142] [2023-11-26 11:44:28,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285546142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:28,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:28,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:44:28,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271215679] [2023-11-26 11:44:28,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:28,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:44:28,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:28,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:44:28,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:44:28,769 INFO L87 Difference]: Start difference. First operand 20829 states and 34980 transitions. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95)