./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-81.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl --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 e889afe7dbc18302406a41b275e3ceb2423ed88227c4b051d1ca24b7db47f75f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:32:55,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:32:55,383 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:32:55,388 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:32:55,389 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:32:55,414 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:32:55,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:32:55,415 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:32:55,416 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:32:55,417 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:32:55,418 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:32:55,419 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:32:55,419 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:32:55,420 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:32:55,421 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:32:55,421 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:32:55,422 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:32:55,423 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:32:55,423 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:32:55,424 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:32:55,424 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:32:55,426 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:32:55,426 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:32:55,427 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:32:55,428 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:32:55,428 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:32:55,429 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:32:55,429 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:32:55,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:32:55,431 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:32:55,431 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:32:55,432 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:32:55,432 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:32:55,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:32:55,433 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:32:55,433 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:32:55,434 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:32:55,434 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:32:55,435 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:32:55,435 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_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e889afe7dbc18302406a41b275e3ceb2423ed88227c4b051d1ca24b7db47f75f [2023-11-12 02:32:55,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:32:55,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:32:55,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:32:55,784 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:32:55,784 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:32:55,786 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-81.i [2023-11-12 02:32:58,889 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:32:59,127 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:32:59,127 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-81.i [2023-11-12 02:32:59,154 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/data/330704eff/f6161cc1d5454e1599875cac7e64d27c/FLAG0ea9fed2e [2023-11-12 02:32:59,167 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/data/330704eff/f6161cc1d5454e1599875cac7e64d27c [2023-11-12 02:32:59,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:32:59,171 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:32:59,172 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:32:59,172 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:32:59,177 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:32:59,177 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:32:59" (1/1) ... [2023-11-12 02:32:59,178 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@daa5050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:59, skipping insertion in model container [2023-11-12 02:32:59,178 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:32:59" (1/1) ... [2023-11-12 02:32:59,227 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:32:59,378 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_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-81.i[916,929] [2023-11-12 02:32:59,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:32:59,541 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:32:59,554 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_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-81.i[916,929] [2023-11-12 02:32:59,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:32:59,625 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:32:59,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:59 WrapperNode [2023-11-12 02:32:59,625 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:32:59,627 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:32:59,627 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:32:59,627 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:32:59,634 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:59" (1/1) ... [2023-11-12 02:32:59,650 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:59" (1/1) ... [2023-11-12 02:32:59,718 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 367 [2023-11-12 02:32:59,718 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:32:59,719 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:32:59,719 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:32:59,719 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:32:59,729 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:59" (1/1) ... [2023-11-12 02:32:59,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:59" (1/1) ... [2023-11-12 02:32:59,737 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:59" (1/1) ... [2023-11-12 02:32:59,737 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:59" (1/1) ... [2023-11-12 02:32:59,760 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:59" (1/1) ... [2023-11-12 02:32:59,765 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:59" (1/1) ... [2023-11-12 02:32:59,783 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:59" (1/1) ... [2023-11-12 02:32:59,788 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:59" (1/1) ... [2023-11-12 02:32:59,819 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:32:59,820 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:32:59,820 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:32:59,821 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:32:59,821 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:59" (1/1) ... [2023-11-12 02:32:59,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:32:59,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:59,852 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:32:59,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:32:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:32:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:32:59,916 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:32:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:32:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:32:59,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:33:00,070 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:33:00,072 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:33:00,785 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:33:00,794 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:33:00,794 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:33:00,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:33:00 BoogieIcfgContainer [2023-11-12 02:33:00,801 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:33:00,804 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:33:00,804 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:33:00,808 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:33:00,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:32:59" (1/3) ... [2023-11-12 02:33:00,809 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130c1c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:33:00, skipping insertion in model container [2023-11-12 02:33:00,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:59" (2/3) ... [2023-11-12 02:33:00,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130c1c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:33:00, skipping insertion in model container [2023-11-12 02:33:00,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:33:00" (3/3) ... [2023-11-12 02:33:00,814 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-100_file-81.i [2023-11-12 02:33:00,837 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:33:00,838 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:33:00,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:33:00,900 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;@20fb7ed7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:33:00,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:33:00,906 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 88 states have (on average 1.3977272727272727) internal successors, (123), 89 states have internal predecessors, (123), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-12 02:33:00,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-11-12 02:33:00,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:00,937 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:00,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:00,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:00,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1834529145, now seen corresponding path program 1 times [2023-11-12 02:33:00,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:00,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653182345] [2023-11-12 02:33:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:00,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:01,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:01,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653182345] [2023-11-12 02:33:01,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:33:01,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561297833] [2023-11-12 02:33:01,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:01,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:01,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:01,383 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:01,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:33:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:01,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:33:01,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 8450 trivial. 0 not checked. [2023-11-12 02:33:02,032 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:02,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561297833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:02,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:02,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:33:02,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856322548] [2023-11-12 02:33:02,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:02,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:33:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:02,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:33:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:33:02,092 INFO L87 Difference]: Start difference. First operand has 157 states, 88 states have (on average 1.3977272727272727) internal successors, (123), 89 states have internal predecessors, (123), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 2 states have call successors, (66) [2023-11-12 02:33:02,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:02,179 INFO L93 Difference]: Finished difference Result 306 states and 568 transitions. [2023-11-12 02:33:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:33:02,182 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 2 states have call successors, (66) Word has length 397 [2023-11-12 02:33:02,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:02,192 INFO L225 Difference]: With dead ends: 306 [2023-11-12 02:33:02,193 INFO L226 Difference]: Without dead ends: 152 [2023-11-12 02:33:02,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:33:02,208 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:02,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:33:02,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-12 02:33:02,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-11-12 02:33:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 84 states have (on average 1.3214285714285714) internal successors, (111), 84 states have internal predecessors, (111), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-12 02:33:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 243 transitions. [2023-11-12 02:33:02,322 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 243 transitions. Word has length 397 [2023-11-12 02:33:02,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:02,325 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 243 transitions. [2023-11-12 02:33:02,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 2 states have call successors, (66) [2023-11-12 02:33:02,326 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 243 transitions. [2023-11-12 02:33:02,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-11-12 02:33:02,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:02,351 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:02,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:02,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:33:02,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:02,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:02,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1215580307, now seen corresponding path program 1 times [2023-11-12 02:33:02,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:02,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022935417] [2023-11-12 02:33:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:02,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:02,702 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:02,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631073315] [2023-11-12 02:33:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:02,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:02,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:02,712 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:02,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:33:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:03,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:33:03,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 3165 proven. 45 refuted. 0 times theorem prover too weak. 5370 trivial. 0 not checked. [2023-11-12 02:33:03,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 150 proven. 45 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-11-12 02:33:03,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:03,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022935417] [2023-11-12 02:33:03,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:03,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631073315] [2023-11-12 02:33:03,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631073315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:03,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:33:03,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:33:03,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166822451] [2023-11-12 02:33:03,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:03,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:33:03,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:03,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:33:03,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:33:03,657 INFO L87 Difference]: Start difference. First operand 152 states and 243 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 2 states have call successors, (81), 2 states have call predecessors, (81), 4 states have return successors, (82), 2 states have call predecessors, (82), 2 states have call successors, (82) [2023-11-12 02:33:04,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:04,601 INFO L93 Difference]: Finished difference Result 389 states and 620 transitions. [2023-11-12 02:33:04,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:33:04,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 2 states have call successors, (81), 2 states have call predecessors, (81), 4 states have return successors, (82), 2 states have call predecessors, (82), 2 states have call successors, (82) Word has length 397 [2023-11-12 02:33:04,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:04,609 INFO L225 Difference]: With dead ends: 389 [2023-11-12 02:33:04,609 INFO L226 Difference]: Without dead ends: 240 [2023-11-12 02:33:04,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 786 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:33:04,612 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 139 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:04,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 670 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:33:04,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-12 02:33:04,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2023-11-12 02:33:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 117 states have internal predecessors, (142), 116 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (116), 115 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-12 02:33:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 374 transitions. [2023-11-12 02:33:04,667 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 374 transitions. Word has length 397 [2023-11-12 02:33:04,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:04,669 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 374 transitions. [2023-11-12 02:33:04,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 2 states have call successors, (81), 2 states have call predecessors, (81), 4 states have return successors, (82), 2 states have call predecessors, (82), 2 states have call successors, (82) [2023-11-12 02:33:04,670 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 374 transitions. [2023-11-12 02:33:04,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2023-11-12 02:33:04,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:04,675 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:04,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:04,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:04,882 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:04,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:04,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1840969282, now seen corresponding path program 1 times [2023-11-12 02:33:04,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:04,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737075692] [2023-11-12 02:33:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:04,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:04,998 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:04,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683205232] [2023-11-12 02:33:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:04,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:04,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:05,002 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:05,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:33:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:05,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:33:05,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 2130 proven. 357 refuted. 0 times theorem prover too weak. 6093 trivial. 0 not checked. [2023-11-12 02:33:07,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 27 proven. 360 refuted. 0 times theorem prover too weak. 8193 trivial. 0 not checked. [2023-11-12 02:33:07,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:07,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737075692] [2023-11-12 02:33:07,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:07,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683205232] [2023-11-12 02:33:07,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683205232] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:07,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:33:07,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-12 02:33:07,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442544472] [2023-11-12 02:33:07,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:07,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:33:07,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:07,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:33:07,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:33:07,987 INFO L87 Difference]: Start difference. First operand 235 states and 374 transitions. Second operand has 16 states, 16 states have (on average 9.0625) internal successors, (145), 16 states have internal predecessors, (145), 5 states have call successors, (131), 3 states have call predecessors, (131), 7 states have return successors, (132), 4 states have call predecessors, (132), 5 states have call successors, (132) [2023-11-12 02:33:09,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:09,154 INFO L93 Difference]: Finished difference Result 503 states and 757 transitions. [2023-11-12 02:33:09,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-12 02:33:09,156 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.0625) internal successors, (145), 16 states have internal predecessors, (145), 5 states have call successors, (131), 3 states have call predecessors, (131), 7 states have return successors, (132), 4 states have call predecessors, (132), 5 states have call successors, (132) Word has length 398 [2023-11-12 02:33:09,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:09,162 INFO L225 Difference]: With dead ends: 503 [2023-11-12 02:33:09,163 INFO L226 Difference]: Without dead ends: 350 [2023-11-12 02:33:09,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 816 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=356, Invalid=834, Unknown=0, NotChecked=0, Total=1190 [2023-11-12 02:33:09,166 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 314 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:09,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 540 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:33:09,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-11-12 02:33:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 296. [2023-11-12 02:33:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 160 states have (on average 1.2) internal successors, (192), 162 states have internal predecessors, (192), 126 states have call successors, (126), 9 states have call predecessors, (126), 9 states have return successors, (126), 124 states have call predecessors, (126), 126 states have call successors, (126) [2023-11-12 02:33:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 444 transitions. [2023-11-12 02:33:09,228 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 444 transitions. Word has length 398 [2023-11-12 02:33:09,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:09,230 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 444 transitions. [2023-11-12 02:33:09,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.0625) internal successors, (145), 16 states have internal predecessors, (145), 5 states have call successors, (131), 3 states have call predecessors, (131), 7 states have return successors, (132), 4 states have call predecessors, (132), 5 states have call successors, (132) [2023-11-12 02:33:09,231 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 444 transitions. [2023-11-12 02:33:09,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2023-11-12 02:33:09,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:09,235 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:09,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:09,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:09,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:09,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:09,444 INFO L85 PathProgramCache]: Analyzing trace with hash 364141825, now seen corresponding path program 1 times [2023-11-12 02:33:09,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:09,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233153917] [2023-11-12 02:33:09,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:09,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:09,509 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:09,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650612216] [2023-11-12 02:33:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:09,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:09,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:09,511 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:09,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:33:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:09,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:33:09,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-12 02:33:09,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:09,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:09,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233153917] [2023-11-12 02:33:09,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:09,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650612216] [2023-11-12 02:33:09,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650612216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:09,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:09,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:33:09,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303986207] [2023-11-12 02:33:09,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:09,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:33:09,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:09,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:33:09,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:33:09,865 INFO L87 Difference]: Start difference. First operand 296 states and 444 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-12 02:33:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:09,955 INFO L93 Difference]: Finished difference Result 538 states and 790 transitions. [2023-11-12 02:33:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:33:09,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 399 [2023-11-12 02:33:09,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:09,960 INFO L225 Difference]: With dead ends: 538 [2023-11-12 02:33:09,960 INFO L226 Difference]: Without dead ends: 336 [2023-11-12 02:33:09,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:33:09,964 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 62 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:09,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 670 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:33:09,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-11-12 02:33:10,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 333. [2023-11-12 02:33:10,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 189 states have (on average 1.1746031746031746) internal successors, (222), 192 states have internal predecessors, (222), 130 states have call successors, (130), 13 states have call predecessors, (130), 13 states have return successors, (130), 127 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-12 02:33:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 482 transitions. [2023-11-12 02:33:10,031 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 482 transitions. Word has length 399 [2023-11-12 02:33:10,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:10,033 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 482 transitions. [2023-11-12 02:33:10,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-12 02:33:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 482 transitions. [2023-11-12 02:33:10,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2023-11-12 02:33:10,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:10,037 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:10,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:10,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:10,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:10,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:10,245 INFO L85 PathProgramCache]: Analyzing trace with hash -28885185, now seen corresponding path program 1 times [2023-11-12 02:33:10,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:10,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447936739] [2023-11-12 02:33:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:10,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:10,312 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:10,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296562280] [2023-11-12 02:33:10,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:10,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:10,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:10,314 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:10,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:33:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:10,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:33:10,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 1905 proven. 171 refuted. 0 times theorem prover too weak. 6504 trivial. 0 not checked. [2023-11-12 02:33:11,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 24 proven. 171 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-11-12 02:33:11,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:11,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447936739] [2023-11-12 02:33:11,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:11,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296562280] [2023-11-12 02:33:11,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296562280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:11,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:33:11,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-12 02:33:11,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635074645] [2023-11-12 02:33:11,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:11,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:33:11,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:11,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:33:11,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:33:11,703 INFO L87 Difference]: Start difference. First operand 333 states and 482 transitions. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 3 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 3 states have call predecessors, (124), 3 states have call successors, (124) [2023-11-12 02:33:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:13,162 INFO L93 Difference]: Finished difference Result 664 states and 948 transitions. [2023-11-12 02:33:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:33:13,163 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 3 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 3 states have call predecessors, (124), 3 states have call successors, (124) Word has length 399 [2023-11-12 02:33:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:13,169 INFO L225 Difference]: With dead ends: 664 [2023-11-12 02:33:13,169 INFO L226 Difference]: Without dead ends: 429 [2023-11-12 02:33:13,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 787 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:33:13,171 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 330 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:13,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1305 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 02:33:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2023-11-12 02:33:13,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 377. [2023-11-12 02:33:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 212 states have (on average 1.1415094339622642) internal successors, (242), 215 states have internal predecessors, (242), 146 states have call successors, (146), 18 states have call predecessors, (146), 18 states have return successors, (146), 143 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-12 02:33:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 534 transitions. [2023-11-12 02:33:13,238 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 534 transitions. Word has length 399 [2023-11-12 02:33:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:13,239 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 534 transitions. [2023-11-12 02:33:13,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 3 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 3 states have call predecessors, (124), 3 states have call successors, (124) [2023-11-12 02:33:13,240 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 534 transitions. [2023-11-12 02:33:13,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2023-11-12 02:33:13,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:13,244 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:13,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:13,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:13,452 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:13,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:13,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1448439620, now seen corresponding path program 1 times [2023-11-12 02:33:13,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:13,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574003939] [2023-11-12 02:33:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:13,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:13,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:13,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100966047] [2023-11-12 02:33:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:13,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:13,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:13,513 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:13,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:33:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:13,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 02:33:13,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 1977 proven. 543 refuted. 0 times theorem prover too weak. 6060 trivial. 0 not checked. [2023-11-12 02:33:25,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-12 02:33:33,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:33,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574003939] [2023-11-12 02:33:33,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:33,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100966047] [2023-11-12 02:33:33,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100966047] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:33,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:33:33,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-12 02:33:33,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607704387] [2023-11-12 02:33:33,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:33,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:33:33,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:33,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:33:33,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:33:33,359 INFO L87 Difference]: Start difference. First operand 377 states and 534 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-12 02:33:34,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:34,782 INFO L93 Difference]: Finished difference Result 689 states and 959 transitions. [2023-11-12 02:33:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:33:34,783 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 400 [2023-11-12 02:33:34,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:34,789 INFO L225 Difference]: With dead ends: 689 [2023-11-12 02:33:34,789 INFO L226 Difference]: Without dead ends: 446 [2023-11-12 02:33:34,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 775 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 02:33:34,792 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 191 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:34,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1318 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:33:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-11-12 02:33:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 387. [2023-11-12 02:33:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 222 states have (on average 1.1486486486486487) internal successors, (255), 225 states have internal predecessors, (255), 146 states have call successors, (146), 18 states have call predecessors, (146), 18 states have return successors, (146), 143 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-12 02:33:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 547 transitions. [2023-11-12 02:33:34,850 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 547 transitions. Word has length 400 [2023-11-12 02:33:34,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:34,851 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 547 transitions. [2023-11-12 02:33:34,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-12 02:33:34,852 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 547 transitions. [2023-11-12 02:33:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2023-11-12 02:33:34,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:34,855 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:34,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:35,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:33:35,063 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:35,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:35,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1190274182, now seen corresponding path program 1 times [2023-11-12 02:33:35,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:35,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207181168] [2023-11-12 02:33:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:35,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:35,116 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:35,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54213068] [2023-11-12 02:33:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:35,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:35,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:35,118 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:35,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b7a27b-b6a4-4cb9-a32e-2d0ce36a6442/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:33:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:35,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-12 02:33:35,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 1977 proven. 543 refuted. 0 times theorem prover too weak. 6060 trivial. 0 not checked. [2023-11-12 02:33:44,870 INFO L327 TraceCheckSpWp]: Computing backward predicates...