./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-cn_file-36.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-cn_file-36.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya --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 2e3d524f819c0bc1287e1839ff836746879f5ba2074defa7e5e3ec44f7e326d0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:13:18,407 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:13:18,470 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:13:18,474 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:13:18,474 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:13:18,499 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:13:18,499 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:13:18,500 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:13:18,501 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:13:18,501 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:13:18,502 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:13:18,502 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:13:18,503 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:13:18,503 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:13:18,504 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:13:18,504 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:13:18,505 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:13:18,505 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:13:18,506 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:13:18,506 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:13:18,507 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:13:18,507 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:13:18,508 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:13:18,508 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:13:18,508 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:13:18,509 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:13:18,509 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:13:18,509 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:13:18,510 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:13:18,510 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:13:18,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:13:18,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:13:18,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:13:18,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:13:18,512 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:13:18,512 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:13:18,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:13:18,512 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:13:18,512 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:13:18,512 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:13:18,513 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:13:18,513 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:13:18,513 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_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e3d524f819c0bc1287e1839ff836746879f5ba2074defa7e5e3ec44f7e326d0 [2023-11-29 00:13:18,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:13:18,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:13:18,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:13:18,795 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:13:18,795 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:13:18,796 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-cn_file-36.i [2023-11-29 00:13:21,607 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:13:21,802 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:13:21,803 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-cn_file-36.i [2023-11-29 00:13:21,815 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/data/52c261431/53dd00716c5f4edd9a6f2b32a67ddc8d/FLAGbf9f3fd61 [2023-11-29 00:13:21,829 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/data/52c261431/53dd00716c5f4edd9a6f2b32a67ddc8d [2023-11-29 00:13:21,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:13:21,833 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:13:21,834 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:13:21,834 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:13:21,838 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:13:21,839 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:13:21" (1/1) ... [2023-11-29 00:13:21,840 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425aa6cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:21, skipping insertion in model container [2023-11-29 00:13:21,840 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:13:21" (1/1) ... [2023-11-29 00:13:21,877 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:13:22,016 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_3039bd7b-f83a-4dac-999a-1fb685cd1d89/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-cn_file-36.i[919,932] [2023-11-29 00:13:22,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:13:22,122 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:13:22,133 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_3039bd7b-f83a-4dac-999a-1fb685cd1d89/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-cn_file-36.i[919,932] [2023-11-29 00:13:22,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:13:22,206 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:13:22,207 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:22 WrapperNode [2023-11-29 00:13:22,207 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:13:22,208 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:13:22,208 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:13:22,208 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:13:22,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:22" (1/1) ... [2023-11-29 00:13:22,230 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:22" (1/1) ... [2023-11-29 00:13:22,277 INFO L138 Inliner]: procedures = 26, calls = 59, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 284 [2023-11-29 00:13:22,277 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:13:22,278 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:13:22,278 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:13:22,279 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:13:22,289 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:22" (1/1) ... [2023-11-29 00:13:22,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:22" (1/1) ... [2023-11-29 00:13:22,294 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:22" (1/1) ... [2023-11-29 00:13:22,316 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]. [2023-11-29 00:13:22,317 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:22" (1/1) ... [2023-11-29 00:13:22,317 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:22" (1/1) ... [2023-11-29 00:13:22,336 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:22" (1/1) ... [2023-11-29 00:13:22,341 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:22" (1/1) ... [2023-11-29 00:13:22,345 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:22" (1/1) ... [2023-11-29 00:13:22,349 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:22" (1/1) ... [2023-11-29 00:13:22,355 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:13:22,357 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:13:22,357 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:13:22,357 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:13:22,358 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:22" (1/1) ... [2023-11-29 00:13:22,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:13:22,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:13:22,388 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:13:22,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:13:22,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:13:22,427 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:13:22,427 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:13:22,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:13:22,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:13:22,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:13:22,531 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:13:22,534 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:13:22,980 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:13:23,020 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:13:23,020 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:13:23,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:13:23 BoogieIcfgContainer [2023-11-29 00:13:23,021 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:13:23,023 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:13:23,024 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:13:23,026 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:13:23,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:13:21" (1/3) ... [2023-11-29 00:13:23,027 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652a889f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:13:23, skipping insertion in model container [2023-11-29 00:13:23,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:13:22" (2/3) ... [2023-11-29 00:13:23,027 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652a889f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:13:23, skipping insertion in model container [2023-11-29 00:13:23,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:13:23" (3/3) ... [2023-11-29 00:13:23,029 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pr-cn_file-36.i [2023-11-29 00:13:23,044 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:13:23,044 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:13:23,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:13:23,095 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;@2cc8e61b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:13:23,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:13:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 69 states have internal predecessors, (97), 46 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-29 00:13:23,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2023-11-29 00:13:23,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:13:23,121 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:13:23,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:13:23,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:13:23,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2029687712, now seen corresponding path program 1 times [2023-11-29 00:13:23,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:13:23,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659470698] [2023-11-29 00:13:23,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:23,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:13:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:13:23,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:13:23,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659470698] [2023-11-29 00:13:23,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:13:23,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363119325] [2023-11-29 00:13:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:23,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:13:23,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:13:23,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:13:23,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:13:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:13:23,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:13:23,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:13:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 4050 trivial. 0 not checked. [2023-11-29 00:13:23,754 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:13:23,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363119325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:13:23,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:13:23,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:13:23,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905443234] [2023-11-29 00:13:23,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:13:23,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:13:23,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:13:23,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:13:23,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:13:23,789 INFO L87 Difference]: Start difference. First operand has 117 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 69 states have internal predecessors, (97), 46 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 2 states have call successors, (46) [2023-11-29 00:13:23,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:13:23,841 INFO L93 Difference]: Finished difference Result 231 states and 422 transitions. [2023-11-29 00:13:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:13:23,844 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 2 states have call successors, (46) Word has length 284 [2023-11-29 00:13:23,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:13:23,854 INFO L225 Difference]: With dead ends: 231 [2023-11-29 00:13:23,854 INFO L226 Difference]: Without dead ends: 115 [2023-11-29 00:13:23,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:13:23,863 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:13:23,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 180 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:13:23,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-29 00:13:23,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-11-29 00:13:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.3582089552238805) internal successors, (91), 67 states have internal predecessors, (91), 46 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-29 00:13:23,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 183 transitions. [2023-11-29 00:13:23,926 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 183 transitions. Word has length 284 [2023-11-29 00:13:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:13:23,927 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 183 transitions. [2023-11-29 00:13:23,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 2 states have call successors, (46) [2023-11-29 00:13:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 183 transitions. [2023-11-29 00:13:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2023-11-29 00:13:23,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:13:23,935 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:13:23,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:13:24,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:13:24,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:13:24,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:13:24,138 INFO L85 PathProgramCache]: Analyzing trace with hash -128484616, now seen corresponding path program 1 times [2023-11-29 00:13:24,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:13:24,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386453329] [2023-11-29 00:13:24,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:24,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:13:24,224 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:13:24,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451510689] [2023-11-29 00:13:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:24,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:13:24,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:13:24,226 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:13:24,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:13:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:13:24,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:13:24,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:13:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-11-29 00:13:24,550 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:13:24,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:13:24,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386453329] [2023-11-29 00:13:24,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:13:24,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451510689] [2023-11-29 00:13:24,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451510689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:13:24,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:13:24,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:13:24,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669122035] [2023-11-29 00:13:24,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:13:24,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:13:24,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:13:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:13:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:13:24,556 INFO L87 Difference]: Start difference. First operand 115 states and 183 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 1 states have call successors, (46) [2023-11-29 00:13:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:13:24,617 INFO L93 Difference]: Finished difference Result 262 states and 419 transitions. [2023-11-29 00:13:24,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:13:24,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 1 states have call successors, (46) Word has length 284 [2023-11-29 00:13:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:13:24,622 INFO L225 Difference]: With dead ends: 262 [2023-11-29 00:13:24,622 INFO L226 Difference]: Without dead ends: 148 [2023-11-29 00:13:24,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:13:24,625 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 49 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:13:24,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 344 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:13:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-29 00:13:24,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 135. [2023-11-29 00:13:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 87 states have (on average 1.4137931034482758) internal successors, (123), 87 states have internal predecessors, (123), 46 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-29 00:13:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 215 transitions. [2023-11-29 00:13:24,648 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 215 transitions. Word has length 284 [2023-11-29 00:13:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:13:24,651 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 215 transitions. [2023-11-29 00:13:24,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 1 states have call successors, (46) [2023-11-29 00:13:24,651 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 215 transitions. [2023-11-29 00:13:24,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2023-11-29 00:13:24,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:13:24,657 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:13:24,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:13:24,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 00:13:24,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:13:24,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:13:24,859 INFO L85 PathProgramCache]: Analyzing trace with hash 294217210, now seen corresponding path program 1 times [2023-11-29 00:13:24,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:13:24,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511692232] [2023-11-29 00:13:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:24,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:13:24,930 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:13:24,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349878720] [2023-11-29 00:13:24,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:24,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:13:24,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:13:24,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:13:24,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:13:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:13:25,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:13:25,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:13:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-11-29 00:13:25,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:13:25,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:13:25,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511692232] [2023-11-29 00:13:25,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:13:25,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349878720] [2023-11-29 00:13:25,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349878720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:13:25,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:13:25,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:13:25,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959161281] [2023-11-29 00:13:25,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:13:25,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:13:25,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:13:25,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:13:25,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:13:25,231 INFO L87 Difference]: Start difference. First operand 135 states and 215 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 1 states have call successors, (46) [2023-11-29 00:13:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:13:25,471 INFO L93 Difference]: Finished difference Result 491 states and 783 transitions. [2023-11-29 00:13:25,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:13:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 1 states have call successors, (46) Word has length 284 [2023-11-29 00:13:25,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:13:25,477 INFO L225 Difference]: With dead ends: 491 [2023-11-29 00:13:25,477 INFO L226 Difference]: Without dead ends: 357 [2023-11-29 00:13:25,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:13:25,480 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 304 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:13:25,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 612 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:13:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-11-29 00:13:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 215. [2023-11-29 00:13:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 142 states have (on average 1.4225352112676057) internal successors, (202), 143 states have internal predecessors, (202), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-29 00:13:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 342 transitions. [2023-11-29 00:13:25,528 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 342 transitions. Word has length 284 [2023-11-29 00:13:25,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:13:25,530 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 342 transitions. [2023-11-29 00:13:25,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 1 states have call successors, (46) [2023-11-29 00:13:25,530 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 342 transitions. [2023-11-29 00:13:25,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2023-11-29 00:13:25,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:13:25,533 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:13:25,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:13:25,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 00:13:25,737 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:13:25,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:13:25,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1434991685, now seen corresponding path program 1 times [2023-11-29 00:13:25,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:13:25,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102948808] [2023-11-29 00:13:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:25,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:13:25,793 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:13:25,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873134120] [2023-11-29 00:13:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:25,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:13:25,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:13:25,795 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:13:25,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:13:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:13:26,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:13:26,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:13:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 783 proven. 12 refuted. 0 times theorem prover too weak. 3345 trivial. 0 not checked. [2023-11-29 00:13:26,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:13:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 123 proven. 12 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2023-11-29 00:13:26,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:13:26,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102948808] [2023-11-29 00:13:26,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:13:26,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873134120] [2023-11-29 00:13:26,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873134120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:13:26,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:13:26,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-29 00:13:26,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723258137] [2023-11-29 00:13:26,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:13:26,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:13:26,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:13:26,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:13:26,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:13:26,533 INFO L87 Difference]: Start difference. First operand 215 states and 342 transitions. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 2 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-29 00:13:27,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:13:27,885 INFO L93 Difference]: Finished difference Result 568 states and 885 transitions. [2023-11-29 00:13:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 00:13:27,885 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 2 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 285 [2023-11-29 00:13:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:13:27,891 INFO L225 Difference]: With dead ends: 568 [2023-11-29 00:13:27,891 INFO L226 Difference]: Without dead ends: 354 [2023-11-29 00:13:27,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 557 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2023-11-29 00:13:27,894 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 366 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:13:27,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 787 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:13:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-11-29 00:13:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 168. [2023-11-29 00:13:27,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 118 states have (on average 1.4406779661016949) internal successors, (170), 118 states have internal predecessors, (170), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-29 00:13:27,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 262 transitions. [2023-11-29 00:13:27,923 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 262 transitions. Word has length 285 [2023-11-29 00:13:27,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:13:27,925 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 262 transitions. [2023-11-29 00:13:27,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 2 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-29 00:13:27,925 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 262 transitions. [2023-11-29 00:13:27,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-11-29 00:13:27,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:13:27,928 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:13:27,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:13:28,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:13:28,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:13:28,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:13:28,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1124438859, now seen corresponding path program 1 times [2023-11-29 00:13:28,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:13:28,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290232101] [2023-11-29 00:13:28,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:28,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:13:28,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:13:28,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269377695] [2023-11-29 00:13:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:28,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:13:28,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:13:28,186 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:13:28,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:13:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:13:28,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:13:28,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:13:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 777 proven. 147 refuted. 0 times theorem prover too weak. 3216 trivial. 0 not checked. [2023-11-29 00:13:28,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:13:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 246 proven. 21 refuted. 0 times theorem prover too weak. 3873 trivial. 0 not checked. [2023-11-29 00:13:29,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:13:29,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290232101] [2023-11-29 00:13:29,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:13:29,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269377695] [2023-11-29 00:13:29,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269377695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:13:29,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:13:29,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-29 00:13:29,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120236938] [2023-11-29 00:13:29,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:13:29,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:13:29,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:13:29,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:13:29,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:13:29,219 INFO L87 Difference]: Start difference. First operand 168 states and 262 transitions. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 4 states have call successors, (50), 3 states have call predecessors, (50), 6 states have return successors, (52), 4 states have call predecessors, (52), 4 states have call successors, (52) [2023-11-29 00:13:29,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:13:29,842 INFO L93 Difference]: Finished difference Result 347 states and 535 transitions. [2023-11-29 00:13:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:13:29,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 4 states have call successors, (50), 3 states have call predecessors, (50), 6 states have return successors, (52), 4 states have call predecessors, (52), 4 states have call successors, (52) Word has length 286 [2023-11-29 00:13:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:13:29,845 INFO L225 Difference]: With dead ends: 347 [2023-11-29 00:13:29,846 INFO L226 Difference]: Without dead ends: 180 [2023-11-29 00:13:29,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 556 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:13:29,847 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 251 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:13:29,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 432 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:13:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-29 00:13:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2023-11-29 00:13:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 121 states have (on average 1.4297520661157024) internal successors, (173), 121 states have internal predecessors, (173), 46 states have call successors, (46), 4 states have call predecessors, (46), 4 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-29 00:13:29,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 265 transitions. [2023-11-29 00:13:29,866 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 265 transitions. Word has length 286 [2023-11-29 00:13:29,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:13:29,867 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 265 transitions. [2023-11-29 00:13:29,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 4 states have call successors, (50), 3 states have call predecessors, (50), 6 states have return successors, (52), 4 states have call predecessors, (52), 4 states have call successors, (52) [2023-11-29 00:13:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 265 transitions. [2023-11-29 00:13:29,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-11-29 00:13:29,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:13:29,870 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:13:29,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:13:30,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:13:30,071 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:13:30,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:13:30,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1933785485, now seen corresponding path program 1 times [2023-11-29 00:13:30,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:13:30,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550706779] [2023-11-29 00:13:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:30,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:13:30,116 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:13:30,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905740394] [2023-11-29 00:13:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:30,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:13:30,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:13:30,117 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:13:30,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:13:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:13:30,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 00:13:30,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:13:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 783 proven. 12 refuted. 0 times theorem prover too weak. 3345 trivial. 0 not checked. [2023-11-29 00:13:30,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:13:35,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:13:35,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550706779] [2023-11-29 00:13:35,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:13:35,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905740394] [2023-11-29 00:13:35,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905740394] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:13:35,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:13:35,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-11-29 00:13:35,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142242703] [2023-11-29 00:13:35,413 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:13:35,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:13:35,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:13:35,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:13:35,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2023-11-29 00:13:35,415 INFO L87 Difference]: Start difference. First operand 172 states and 265 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2023-11-29 00:13:35,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:13:35,965 INFO L93 Difference]: Finished difference Result 478 states and 732 transitions. [2023-11-29 00:13:35,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:13:35,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 286 [2023-11-29 00:13:35,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:13:35,969 INFO L225 Difference]: With dead ends: 478 [2023-11-29 00:13:35,969 INFO L226 Difference]: Without dead ends: 307 [2023-11-29 00:13:35,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2023-11-29 00:13:35,971 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 125 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:13:35,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 509 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:13:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-29 00:13:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 279. [2023-11-29 00:13:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 178 states have (on average 1.3370786516853932) internal successors, (238), 178 states have internal predecessors, (238), 92 states have call successors, (92), 8 states have call predecessors, (92), 8 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-29 00:13:36,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 422 transitions. [2023-11-29 00:13:36,018 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 422 transitions. Word has length 286 [2023-11-29 00:13:36,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:13:36,019 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 422 transitions. [2023-11-29 00:13:36,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2023-11-29 00:13:36,020 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 422 transitions. [2023-11-29 00:13:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-11-29 00:13:36,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:13:36,022 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:13:36,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:13:36,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:13:36,223 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:13:36,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:13:36,223 INFO L85 PathProgramCache]: Analyzing trace with hash 367037105, now seen corresponding path program 1 times [2023-11-29 00:13:36,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:13:36,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107837946] [2023-11-29 00:13:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:36,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:13:36,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:13:36,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145361785] [2023-11-29 00:13:36,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:36,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:13:36,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:13:36,260 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:13:36,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3039bd7b-f83a-4dac-999a-1fb685cd1d89/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:13:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:13:36,528 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.