./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-16.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_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/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_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-16.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/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_f0075e31-b756-4c02-9d01-515dce279d8d/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 389e5122d2a896fa997dc3e746e2063bdab378065edf7fbb3d476f6d5f7b2736 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:59:42,891 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:59:42,979 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:59:42,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:59:42,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:59:43,019 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:59:43,020 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:59:43,020 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:59:43,021 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:59:43,022 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:59:43,023 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:59:43,023 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:59:43,024 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:59:43,025 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:59:43,026 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:59:43,027 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:59:43,027 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:59:43,028 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:59:43,029 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:59:43,029 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:59:43,030 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:59:43,031 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:59:43,032 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:59:43,032 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:59:43,033 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:59:43,033 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:59:43,034 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:59:43,035 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:59:43,035 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:59:43,036 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:59:43,037 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:59:43,037 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:43,038 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:59:43,039 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:59:43,039 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:59:43,040 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:59:43,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:59:43,041 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:59:43,042 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:59:43,042 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:59:43,043 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:59:43,050 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:59:43,051 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_f0075e31-b756-4c02-9d01-515dce279d8d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 389e5122d2a896fa997dc3e746e2063bdab378065edf7fbb3d476f6d5f7b2736 [2023-11-26 11:59:43,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:59:43,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:59:43,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:59:43,447 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:59:43,448 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:59:43,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-16.i [2023-11-26 11:59:46,655 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:59:46,885 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:59:46,886 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-16.i [2023-11-26 11:59:46,924 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/data/6c3ceb727/0d737a2b629247fbb1936d43c9dd5db5/FLAG62200c07c [2023-11-26 11:59:46,944 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/data/6c3ceb727/0d737a2b629247fbb1936d43c9dd5db5 [2023-11-26 11:59:46,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:59:46,955 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:59:46,957 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:46,957 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:59:46,962 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:59:46,962 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:46" (1/1) ... [2023-11-26 11:59:46,963 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46d39a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:46, skipping insertion in model container [2023-11-26 11:59:46,964 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:46" (1/1) ... [2023-11-26 11:59:47,019 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:59:47,187 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_f0075e31-b756-4c02-9d01-515dce279d8d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-16.i[919,932] [2023-11-26 11:59:47,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:47,295 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:59:47,308 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_f0075e31-b756-4c02-9d01-515dce279d8d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-16.i[919,932] [2023-11-26 11:59:47,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:47,403 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:59:47,403 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:47 WrapperNode [2023-11-26 11:59:47,404 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:47,405 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:59:47,405 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:59:47,405 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:59:47,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:47" (1/1) ... [2023-11-26 11:59:47,429 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:47" (1/1) ... [2023-11-26 11:59:47,510 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 328 [2023-11-26 11:59:47,511 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:59:47,512 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:59:47,512 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:59:47,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:59:47,524 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:47" (1/1) ... [2023-11-26 11:59:47,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:47" (1/1) ... [2023-11-26 11:59:47,530 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:47" (1/1) ... [2023-11-26 11:59:47,552 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 11:59:47,552 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:47" (1/1) ... [2023-11-26 11:59:47,552 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:47" (1/1) ... [2023-11-26 11:59:47,571 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:47" (1/1) ... [2023-11-26 11:59:47,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:47" (1/1) ... [2023-11-26 11:59:47,581 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:47" (1/1) ... [2023-11-26 11:59:47,585 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:47" (1/1) ... [2023-11-26 11:59:47,595 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:59:47,596 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:59:47,596 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:59:47,597 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:59:47,597 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:47" (1/1) ... [2023-11-26 11:59:47,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:47,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:47,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:59:47,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:59:47,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:59:47,702 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:59:47,703 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:59:47,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:59:47,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:59:47,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:59:47,875 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:59:47,878 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:59:48,541 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:59:48,597 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:59:48,599 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:59:48,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:59:48 BoogieIcfgContainer [2023-11-26 11:59:48,600 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:59:48,602 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:59:48,604 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:59:48,607 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:59:48,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:59:46" (1/3) ... [2023-11-26 11:59:48,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734d7172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:59:48, skipping insertion in model container [2023-11-26 11:59:48,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:47" (2/3) ... [2023-11-26 11:59:48,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734d7172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:59:48, skipping insertion in model container [2023-11-26 11:59:48,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:59:48" (3/3) ... [2023-11-26 11:59:48,617 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pe-co_file-16.i [2023-11-26 11:59:48,638 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:59:48,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:59:48,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:59:48,716 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;@37f6b768, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:59:48,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:59:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 73 states have internal predecessors, (103), 55 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-26 11:59:48,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-11-26 11:59:48,747 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:48,748 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:59:48,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:48,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:48,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1423573295, now seen corresponding path program 1 times [2023-11-26 11:59:48,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:48,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771802712] [2023-11-26 11:59:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:48,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:49,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:49,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771802712] [2023-11-26 11:59:49,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:59:49,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578063469] [2023-11-26 11:59:49,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:49,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:49,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:49,098 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:49,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:59:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:49,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:59:49,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2023-11-26 11:59:49,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:49,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578063469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:49,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:49,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:59:49,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281496481] [2023-11-26 11:59:49,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:49,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:59:49,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:59:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:59:49,641 INFO L87 Difference]: Start difference. First operand has 130 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 73 states have internal predecessors, (103), 55 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 2 states have call successors, (55) [2023-11-26 11:59:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:49,699 INFO L93 Difference]: Finished difference Result 257 states and 479 transitions. [2023-11-26 11:59:49,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:59:49,704 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 2 states have call successors, (55) Word has length 330 [2023-11-26 11:59:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:49,719 INFO L225 Difference]: With dead ends: 257 [2023-11-26 11:59:49,720 INFO L226 Difference]: Without dead ends: 128 [2023-11-26 11:59:49,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 329 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 11:59:49,737 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:49,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 204 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:59:49,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-26 11:59:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-11-26 11:59:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 71 states have (on average 1.380281690140845) internal successors, (98), 71 states have internal predecessors, (98), 55 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-26 11:59:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 208 transitions. [2023-11-26 11:59:49,835 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 208 transitions. Word has length 330 [2023-11-26 11:59:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:49,836 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 208 transitions. [2023-11-26 11:59:49,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 2 states have call successors, (55) [2023-11-26 11:59:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 208 transitions. [2023-11-26 11:59:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-11-26 11:59:49,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:49,846 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:59:49,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:59:50,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:59:50,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:50,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:50,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1973741199, now seen corresponding path program 1 times [2023-11-26 11:59:50,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:50,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266755491] [2023-11-26 11:59:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:50,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:50,205 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:50,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259936379] [2023-11-26 11:59:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:50,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:50,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:50,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:50,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:59:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:50,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:59:50,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2023-11-26 11:59:50,665 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:50,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:50,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266755491] [2023-11-26 11:59:50,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:50,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259936379] [2023-11-26 11:59:50,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259936379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:50,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:50,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:59:50,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213372273] [2023-11-26 11:59:50,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:50,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:50,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:50,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:50,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:50,675 INFO L87 Difference]: Start difference. First operand 128 states and 208 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-26 11:59:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:50,920 INFO L93 Difference]: Finished difference Result 387 states and 619 transitions. [2023-11-26 11:59:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:50,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) Word has length 330 [2023-11-26 11:59:50,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:50,927 INFO L225 Difference]: With dead ends: 387 [2023-11-26 11:59:50,927 INFO L226 Difference]: Without dead ends: 260 [2023-11-26 11:59:50,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 328 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 11:59:50,930 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 253 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:50,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 815 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:50,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-26 11:59:50,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 200. [2023-11-26 11:59:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 140 states have (on average 1.5071428571428571) internal successors, (211), 141 states have internal predecessors, (211), 57 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (57), 56 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-26 11:59:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 325 transitions. [2023-11-26 11:59:50,984 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 325 transitions. Word has length 330 [2023-11-26 11:59:50,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:50,986 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 325 transitions. [2023-11-26 11:59:50,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-26 11:59:50,986 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 325 transitions. [2023-11-26 11:59:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-11-26 11:59:50,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:50,992 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:59:51,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:51,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:51,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:51,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:51,199 INFO L85 PathProgramCache]: Analyzing trace with hash 515787763, now seen corresponding path program 1 times [2023-11-26 11:59:51,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:51,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241005803] [2023-11-26 11:59:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:51,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:51,300 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:51,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652372135] [2023-11-26 11:59:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:51,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:51,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:51,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:51,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:59:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:51,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:59:51,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2023-11-26 11:59:51,629 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:51,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:51,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241005803] [2023-11-26 11:59:51,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:51,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652372135] [2023-11-26 11:59:51,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652372135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:51,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:51,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:59:51,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709520615] [2023-11-26 11:59:51,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:51,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:59:51,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:51,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:59:51,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:59:51,637 INFO L87 Difference]: Start difference. First operand 200 states and 325 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-26 11:59:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:51,918 INFO L93 Difference]: Finished difference Result 493 states and 787 transitions. [2023-11-26 11:59:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:59:51,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) Word has length 330 [2023-11-26 11:59:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:51,927 INFO L225 Difference]: With dead ends: 493 [2023-11-26 11:59:51,927 INFO L226 Difference]: Without dead ends: 294 [2023-11-26 11:59:51,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:59:51,930 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 341 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:51,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 1075 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:59:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-11-26 11:59:51,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 273. [2023-11-26 11:59:51,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 207 states have (on average 1.536231884057971) internal successors, (318), 209 states have internal predecessors, (318), 61 states have call successors, (61), 4 states have call predecessors, (61), 4 states have return successors, (61), 59 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-26 11:59:51,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 440 transitions. [2023-11-26 11:59:51,970 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 440 transitions. Word has length 330 [2023-11-26 11:59:51,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:51,972 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 440 transitions. [2023-11-26 11:59:51,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-26 11:59:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 440 transitions. [2023-11-26 11:59:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-11-26 11:59:51,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:51,976 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:59:51,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:52,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:52,183 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:52,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:52,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1478356943, now seen corresponding path program 1 times [2023-11-26 11:59:52,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:52,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139354373] [2023-11-26 11:59:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:52,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:52,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:52,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226574114] [2023-11-26 11:59:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:52,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:52,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:52,242 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:52,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:59:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:52,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:59:52,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2023-11-26 11:59:52,973 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:52,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:52,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139354373] [2023-11-26 11:59:52,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:52,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226574114] [2023-11-26 11:59:52,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226574114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:52,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:52,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:59:52,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817448505] [2023-11-26 11:59:52,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:52,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:59:52,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:52,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:59:52,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:59:52,978 INFO L87 Difference]: Start difference. First operand 273 states and 440 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-26 11:59:53,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:53,341 INFO L93 Difference]: Finished difference Result 774 states and 1253 transitions. [2023-11-26 11:59:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:59:53,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) Word has length 330 [2023-11-26 11:59:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:53,349 INFO L225 Difference]: With dead ends: 774 [2023-11-26 11:59:53,350 INFO L226 Difference]: Without dead ends: 502 [2023-11-26 11:59:53,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:59:53,355 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 423 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:53,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 850 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:59:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-11-26 11:59:53,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 367. [2023-11-26 11:59:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 301 states have (on average 1.584717607973422) internal successors, (477), 303 states have internal predecessors, (477), 61 states have call successors, (61), 4 states have call predecessors, (61), 4 states have return successors, (61), 59 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-26 11:59:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 599 transitions. [2023-11-26 11:59:53,406 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 599 transitions. Word has length 330 [2023-11-26 11:59:53,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:53,407 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 599 transitions. [2023-11-26 11:59:53,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-26 11:59:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 599 transitions. [2023-11-26 11:59:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-11-26 11:59:53,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:53,412 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:59:53,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:53,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:53,619 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:53,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2107754705, now seen corresponding path program 1 times [2023-11-26 11:59:53,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:53,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470526590] [2023-11-26 11:59:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:53,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:53,688 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:53,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654200837] [2023-11-26 11:59:53,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:53,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:53,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:53,689 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:53,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:59:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:53,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-26 11:59:53,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2282 proven. 570 refuted. 0 times theorem prover too weak. 3088 trivial. 0 not checked. [2023-11-26 12:00:01,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:07,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:07,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470526590] [2023-11-26 12:00:07,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:07,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654200837] [2023-11-26 12:00:07,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654200837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:07,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:00:07,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-26 12:00:07,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482370999] [2023-11-26 12:00:07,259 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:07,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 12:00:07,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:07,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 12:00:07,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2023-11-26 12:00:07,262 INFO L87 Difference]: Start difference. First operand 367 states and 599 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (55), 6 states have call predecessors, (55), 7 states have return successors, (55), 6 states have call predecessors, (55), 6 states have call successors, (55) [2023-11-26 12:00:17,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:17,653 INFO L93 Difference]: Finished difference Result 962 states and 1553 transitions. [2023-11-26 12:00:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 12:00:17,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (55), 6 states have call predecessors, (55), 7 states have return successors, (55), 6 states have call predecessors, (55), 6 states have call successors, (55) Word has length 330 [2023-11-26 12:00:17,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:17,660 INFO L225 Difference]: With dead ends: 962 [2023-11-26 12:00:17,660 INFO L226 Difference]: Without dead ends: 596 [2023-11-26 12:00:17,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=493, Invalid=1313, Unknown=0, NotChecked=0, Total=1806 [2023-11-26 12:00:17,663 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 230 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:17,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1496 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-26 12:00:17,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-11-26 12:00:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 590. [2023-11-26 12:00:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 460 states have (on average 1.5456521739130435) internal successors, (711), 463 states have internal predecessors, (711), 118 states have call successors, (118), 11 states have call predecessors, (118), 11 states have return successors, (118), 115 states have call predecessors, (118), 118 states have call successors, (118) [2023-11-26 12:00:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 947 transitions. [2023-11-26 12:00:17,841 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 947 transitions. Word has length 330 [2023-11-26 12:00:17,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:17,843 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 947 transitions. [2023-11-26 12:00:17,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (55), 6 states have call predecessors, (55), 7 states have return successors, (55), 6 states have call predecessors, (55), 6 states have call successors, (55) [2023-11-26 12:00:17,843 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 947 transitions. [2023-11-26 12:00:17,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-26 12:00:17,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:17,847 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:17,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:18,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:18,055 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:18,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:18,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1888176146, now seen corresponding path program 1 times [2023-11-26 12:00:18,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:18,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173230528] [2023-11-26 12:00:18,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:18,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:18,100 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:18,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401382138] [2023-11-26 12:00:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:18,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:18,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:18,102 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:18,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:00:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:18,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 12:00:18,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 1044 proven. 147 refuted. 0 times theorem prover too weak. 4749 trivial. 0 not checked. [2023-11-26 12:00:19,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 15 proven. 147 refuted. 0 times theorem prover too weak. 5778 trivial. 0 not checked. [2023-11-26 12:00:20,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:20,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173230528] [2023-11-26 12:00:20,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:20,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401382138] [2023-11-26 12:00:20,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401382138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:20,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:20,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-26 12:00:20,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964745274] [2023-11-26 12:00:20,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:20,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 12:00:20,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:20,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 12:00:20,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:00:20,191 INFO L87 Difference]: Start difference. First operand 590 states and 947 transitions. Second operand has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-11-26 12:00:25,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:25,458 INFO L93 Difference]: Finished difference Result 2450 states and 3860 transitions. [2023-11-26 12:00:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-26 12:00:25,460 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) Word has length 331 [2023-11-26 12:00:25,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:25,476 INFO L225 Difference]: With dead ends: 2450 [2023-11-26 12:00:25,476 INFO L226 Difference]: Without dead ends: 2084 [2023-11-26 12:00:25,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1295, Invalid=4107, Unknown=0, NotChecked=0, Total=5402 [2023-11-26 12:00:25,482 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 1035 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 2574 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 3184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 2574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:25,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 1865 Invalid, 3184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 2574 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-26 12:00:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2023-11-26 12:00:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1643. [2023-11-26 12:00:25,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1285 states have (on average 1.5330739299610896) internal successors, (1970), 1302 states have internal predecessors, (1970), 323 states have call successors, (323), 34 states have call predecessors, (323), 34 states have return successors, (323), 306 states have call predecessors, (323), 323 states have call successors, (323) [2023-11-26 12:00:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2616 transitions. [2023-11-26 12:00:25,877 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2616 transitions. Word has length 331 [2023-11-26 12:00:25,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:25,878 INFO L495 AbstractCegarLoop]: Abstraction has 1643 states and 2616 transitions. [2023-11-26 12:00:25,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-11-26 12:00:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2616 transitions. [2023-11-26 12:00:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-26 12:00:25,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:25,882 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:25,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:26,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:26,083 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:26,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:26,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1395673900, now seen corresponding path program 1 times [2023-11-26 12:00:26,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:26,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326629193] [2023-11-26 12:00:26,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:26,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:26,131 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:26,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777560648] [2023-11-26 12:00:26,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:26,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:26,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:26,133 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:26,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:00:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:26,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 12:00:26,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 1044 proven. 147 refuted. 0 times theorem prover too weak. 4749 trivial. 0 not checked. [2023-11-26 12:00:27,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 15 proven. 147 refuted. 0 times theorem prover too weak. 5778 trivial. 0 not checked. [2023-11-26 12:00:29,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326629193] [2023-11-26 12:00:29,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777560648] [2023-11-26 12:00:29,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777560648] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:29,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:29,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-26 12:00:29,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6080528] [2023-11-26 12:00:29,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:29,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 12:00:29,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:29,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 12:00:29,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:00:29,184 INFO L87 Difference]: Start difference. First operand 1643 states and 2616 transitions. Second operand has 14 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 4 states have call successors, (110), 3 states have call predecessors, (110), 5 states have return successors, (110), 4 states have call predecessors, (110), 4 states have call successors, (110) [2023-11-26 12:00:33,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:33,975 INFO L93 Difference]: Finished difference Result 5328 states and 8371 transitions. [2023-11-26 12:00:33,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-26 12:00:33,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 4 states have call successors, (110), 3 states have call predecessors, (110), 5 states have return successors, (110), 4 states have call predecessors, (110), 4 states have call successors, (110) Word has length 331 [2023-11-26 12:00:33,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:34,003 INFO L225 Difference]: With dead ends: 5328 [2023-11-26 12:00:34,005 INFO L226 Difference]: Without dead ends: 3686 [2023-11-26 12:00:34,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1011, Invalid=2181, Unknown=0, NotChecked=0, Total=3192 [2023-11-26 12:00:34,013 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1421 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1785 mSolverCounterSat, 1085 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1085 IncrementalHoareTripleChecker+Valid, 1785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:34,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1429 Valid, 1282 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1085 Valid, 1785 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-26 12:00:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2023-11-26 12:00:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 2810. [2023-11-26 12:00:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 2231 states have (on average 1.529359031824294) internal successors, (3412), 2259 states have internal predecessors, (3412), 520 states have call successors, (520), 58 states have call predecessors, (520), 58 states have return successors, (520), 492 states have call predecessors, (520), 520 states have call successors, (520) [2023-11-26 12:00:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 4452 transitions. [2023-11-26 12:00:34,734 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 4452 transitions. Word has length 331 [2023-11-26 12:00:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:34,735 INFO L495 AbstractCegarLoop]: Abstraction has 2810 states and 4452 transitions. [2023-11-26 12:00:34,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 4 states have call successors, (110), 3 states have call predecessors, (110), 5 states have return successors, (110), 4 states have call predecessors, (110), 4 states have call successors, (110) [2023-11-26 12:00:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 4452 transitions. [2023-11-26 12:00:34,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-26 12:00:34,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:34,740 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:34,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:34,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:34,958 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:34,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:34,959 INFO L85 PathProgramCache]: Analyzing trace with hash 601352816, now seen corresponding path program 1 times [2023-11-26 12:00:34,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:34,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705502336] [2023-11-26 12:00:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:34,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:34,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:35,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079912254] [2023-11-26 12:00:35,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:35,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:35,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:35,001 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:35,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0075e31-b756-4c02-9d01-515dce279d8d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:00:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:35,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:00:35,243 INFO L285 TraceCheckSpWp]: Computing forward predicates...