./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-49.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-49.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu --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 64bf7cfb32d6aedb6c2672e68930c45a098bdd68cdd0e4d07a70ee76b55bcc1e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:37:16,731 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:37:16,813 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:37:16,820 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:37:16,821 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:37:16,865 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:37:16,869 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:37:16,871 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:37:16,872 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:37:16,874 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:37:16,875 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:37:16,877 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:37:16,877 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:37:16,880 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:37:16,881 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:37:16,882 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:37:16,883 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:37:16,888 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:37:16,888 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:37:16,889 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:37:16,889 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:37:16,890 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:37:16,892 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:37:16,893 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:37:16,893 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:37:16,894 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:37:16,895 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:37:16,896 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:37:16,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:16,897 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:37:16,898 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:37:16,899 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:37:16,899 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:37:16,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:37:16,900 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:37:16,900 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:37:16,900 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:37:16,901 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:37:16,901 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:37:16,901 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_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64bf7cfb32d6aedb6c2672e68930c45a098bdd68cdd0e4d07a70ee76b55bcc1e [2023-11-19 07:37:17,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:37:17,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:37:17,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:37:17,259 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:37:17,259 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:37:17,261 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-49.i [2023-11-19 07:37:20,366 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:37:20,738 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:37:20,738 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-49.i [2023-11-19 07:37:20,764 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/data/3ae706dd8/ee4cbfb7ad0644549b837b16e6fc503f/FLAG5db9defdc [2023-11-19 07:37:20,784 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/data/3ae706dd8/ee4cbfb7ad0644549b837b16e6fc503f [2023-11-19 07:37:20,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:37:20,797 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:37:20,802 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:20,803 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:37:20,809 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:37:20,813 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:20" (1/1) ... [2023-11-19 07:37:20,814 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4190f445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:20, skipping insertion in model container [2023-11-19 07:37:20,814 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:20" (1/1) ... [2023-11-19 07:37:20,888 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:37:21,048 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_b0473c84-4ab2-463d-8071-9c65ff694a8f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-49.i[916,929] [2023-11-19 07:37:21,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:21,348 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:37:21,360 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_b0473c84-4ab2-463d-8071-9c65ff694a8f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-49.i[916,929] [2023-11-19 07:37:21,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:21,471 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:37:21,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:21 WrapperNode [2023-11-19 07:37:21,472 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:21,473 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:21,473 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:37:21,474 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:37:21,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:21" (1/1) ... [2023-11-19 07:37:21,505 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:21" (1/1) ... [2023-11-19 07:37:21,620 INFO L138 Inliner]: procedures = 26, calls = 115, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 808 [2023-11-19 07:37:21,620 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:21,621 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:37:21,621 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:37:21,622 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:37:21,632 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:21" (1/1) ... [2023-11-19 07:37:21,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:21" (1/1) ... [2023-11-19 07:37:21,644 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:21" (1/1) ... [2023-11-19 07:37:21,645 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:21" (1/1) ... [2023-11-19 07:37:21,703 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:21" (1/1) ... [2023-11-19 07:37:21,712 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:21" (1/1) ... [2023-11-19 07:37:21,727 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:21" (1/1) ... [2023-11-19 07:37:21,737 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:21" (1/1) ... [2023-11-19 07:37:21,760 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:37:21,761 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:37:21,761 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:37:21,761 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:37:21,762 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:21" (1/1) ... [2023-11-19 07:37:21,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:21,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:21,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:37:21,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:37:21,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:37:21,920 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:37:21,920 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:37:21,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:37:21,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:37:21,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:37:22,155 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:37:22,158 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:37:23,370 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:37:23,385 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:37:23,385 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:37:23,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:23 BoogieIcfgContainer [2023-11-19 07:37:23,392 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:37:23,395 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:37:23,396 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:37:23,399 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:37:23,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:37:20" (1/3) ... [2023-11-19 07:37:23,400 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675f4d30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:23, skipping insertion in model container [2023-11-19 07:37:23,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:21" (2/3) ... [2023-11-19 07:37:23,401 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675f4d30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:23, skipping insertion in model container [2023-11-19 07:37:23,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:23" (3/3) ... [2023-11-19 07:37:23,403 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-49.i [2023-11-19 07:37:23,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:37:23,425 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:37:23,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:37:23,499 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;@5ce3b044, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:37:23,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:37:23,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 316 states, 211 states have (on average 1.6208530805687205) internal successors, (342), 212 states have internal predecessors, (342), 102 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-19 07:37:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2023-11-19 07:37:23,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:23,572 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:23,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:23,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:23,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1769285797, now seen corresponding path program 1 times [2023-11-19 07:37:23,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:23,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064757823] [2023-11-19 07:37:23,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:23,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:24,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:24,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064757823] [2023-11-19 07:37:24,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:37:24,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855027822] [2023-11-19 07:37:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:24,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:24,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:24,128 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:24,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:37:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:24,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:37:24,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 20402 trivial. 0 not checked. [2023-11-19 07:37:25,036 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:25,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855027822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:25,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:25,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:25,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710615619] [2023-11-19 07:37:25,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:25,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:37:25,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:25,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:37:25,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:37:25,093 INFO L87 Difference]: Start difference. First operand has 316 states, 211 states have (on average 1.6208530805687205) internal successors, (342), 212 states have internal predecessors, (342), 102 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 2 states have call successors, (102), 2 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 2 states have call successors, (102) [2023-11-19 07:37:25,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:25,181 INFO L93 Difference]: Finished difference Result 624 states and 1186 transitions. [2023-11-19 07:37:25,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:37:25,184 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 2 states have call successors, (102), 2 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 2 states have call successors, (102) Word has length 660 [2023-11-19 07:37:25,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:25,198 INFO L225 Difference]: With dead ends: 624 [2023-11-19 07:37:25,198 INFO L226 Difference]: Without dead ends: 311 [2023-11-19 07:37:25,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 659 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:37:25,211 INFO L413 NwaCegarLoop]: 531 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, 531 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 [2023-11-19 07:37:25,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:25,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-11-19 07:37:25,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2023-11-19 07:37:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 207 states have (on average 1.5797101449275361) internal successors, (327), 207 states have internal predecessors, (327), 102 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-19 07:37:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 531 transitions. [2023-11-19 07:37:25,328 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 531 transitions. Word has length 660 [2023-11-19 07:37:25,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:25,331 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 531 transitions. [2023-11-19 07:37:25,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 2 states have call successors, (102), 2 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 2 states have call successors, (102) [2023-11-19 07:37:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 531 transitions. [2023-11-19 07:37:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2023-11-19 07:37:25,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:25,362 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:25,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:37:25,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:25,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:25,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:25,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1285212421, now seen corresponding path program 1 times [2023-11-19 07:37:25,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:25,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878388009] [2023-11-19 07:37:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:25,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:25,821 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:25,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510931088] [2023-11-19 07:37:25,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:25,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:25,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:25,824 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:25,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:37:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:26,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:37:26,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20604 trivial. 0 not checked. [2023-11-19 07:37:26,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:26,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:26,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878388009] [2023-11-19 07:37:26,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:26,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510931088] [2023-11-19 07:37:26,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510931088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:26,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:26,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:37:26,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729140527] [2023-11-19 07:37:26,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:26,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:37:26,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:26,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:37:26,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:37:26,516 INFO L87 Difference]: Start difference. First operand 311 states and 531 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) [2023-11-19 07:37:27,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:27,102 INFO L93 Difference]: Finished difference Result 928 states and 1589 transitions. [2023-11-19 07:37:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:37:27,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) Word has length 661 [2023-11-19 07:37:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:27,119 INFO L225 Difference]: With dead ends: 928 [2023-11-19 07:37:27,120 INFO L226 Difference]: Without dead ends: 620 [2023-11-19 07:37:27,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:37:27,125 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 513 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:27,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1740 Invalid, 226 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:37:27,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2023-11-19 07:37:27,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 338. [2023-11-19 07:37:27,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 234 states have (on average 1.6196581196581197) internal successors, (379), 234 states have internal predecessors, (379), 102 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-19 07:37:27,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 583 transitions. [2023-11-19 07:37:27,222 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 583 transitions. Word has length 661 [2023-11-19 07:37:27,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:27,226 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 583 transitions. [2023-11-19 07:37:27,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) [2023-11-19 07:37:27,227 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 583 transitions. [2023-11-19 07:37:27,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2023-11-19 07:37:27,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:27,234 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:27,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:27,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:27,449 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:27,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:27,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1080651128, now seen corresponding path program 1 times [2023-11-19 07:37:27,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:27,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151029963] [2023-11-19 07:37:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:27,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:27,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:27,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152225425] [2023-11-19 07:37:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:27,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:27,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:27,623 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:27,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:37:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:28,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:37:28,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20604 trivial. 0 not checked. [2023-11-19 07:37:29,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:29,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:29,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151029963] [2023-11-19 07:37:29,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:29,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152225425] [2023-11-19 07:37:29,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152225425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:29,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:29,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:29,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95124817] [2023-11-19 07:37:29,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:29,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:37:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:29,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:37:29,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:37:29,024 INFO L87 Difference]: Start difference. First operand 338 states and 583 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) [2023-11-19 07:37:29,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:29,487 INFO L93 Difference]: Finished difference Result 1009 states and 1745 transitions. [2023-11-19 07:37:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:37:29,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) Word has length 662 [2023-11-19 07:37:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:29,498 INFO L225 Difference]: With dead ends: 1009 [2023-11-19 07:37:29,498 INFO L226 Difference]: Without dead ends: 674 [2023-11-19 07:37:29,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 659 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:37:29,502 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 204 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:29,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1361 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:37:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-11-19 07:37:29,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2023-11-19 07:37:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 465 states have (on average 1.6236559139784945) internal successors, (755), 465 states have internal predecessors, (755), 204 states have call successors, (204), 2 states have call predecessors, (204), 2 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-11-19 07:37:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1163 transitions. [2023-11-19 07:37:29,654 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1163 transitions. Word has length 662 [2023-11-19 07:37:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:29,660 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 1163 transitions. [2023-11-19 07:37:29,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) [2023-11-19 07:37:29,661 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1163 transitions. [2023-11-19 07:37:29,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2023-11-19 07:37:29,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:29,675 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:29,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:29,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:29,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:29,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash -805891514, now seen corresponding path program 1 times [2023-11-19 07:37:29,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:29,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237439582] [2023-11-19 07:37:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:29,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:30,083 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:30,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223997582] [2023-11-19 07:37:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:30,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:30,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:30,088 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:30,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:37:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:30,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:37:30,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20604 trivial. 0 not checked. [2023-11-19 07:37:30,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:30,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:30,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237439582] [2023-11-19 07:37:30,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:30,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223997582] [2023-11-19 07:37:30,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223997582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:30,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:30,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:30,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855539237] [2023-11-19 07:37:30,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:30,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:30,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:30,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:30,725 INFO L87 Difference]: Start difference. First operand 672 states and 1163 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) [2023-11-19 07:37:30,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:30,865 INFO L93 Difference]: Finished difference Result 1752 states and 3043 transitions. [2023-11-19 07:37:30,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:30,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) Word has length 662 [2023-11-19 07:37:30,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:30,879 INFO L225 Difference]: With dead ends: 1752 [2023-11-19 07:37:30,879 INFO L226 Difference]: Without dead ends: 1083 [2023-11-19 07:37:30,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:30,890 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 323 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:30,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1164 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:37:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2023-11-19 07:37:31,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1079. [2023-11-19 07:37:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 796 states have (on average 1.6331658291457287) internal successors, (1300), 798 states have internal predecessors, (1300), 278 states have call successors, (278), 4 states have call predecessors, (278), 4 states have return successors, (278), 276 states have call predecessors, (278), 278 states have call successors, (278) [2023-11-19 07:37:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1856 transitions. [2023-11-19 07:37:31,095 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1856 transitions. Word has length 662 [2023-11-19 07:37:31,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:31,097 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1856 transitions. [2023-11-19 07:37:31,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) [2023-11-19 07:37:31,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1856 transitions. [2023-11-19 07:37:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2023-11-19 07:37:31,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:31,108 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:31,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:31,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:31,315 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:31,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1091522765, now seen corresponding path program 1 times [2023-11-19 07:37:31,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:31,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999085953] [2023-11-19 07:37:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:31,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:31,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:31,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917903522] [2023-11-19 07:37:31,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:31,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:31,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:31,436 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:31,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:37:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:32,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:37:32,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20604 trivial. 0 not checked. [2023-11-19 07:37:32,202 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:32,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:32,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999085953] [2023-11-19 07:37:32,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:32,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917903522] [2023-11-19 07:37:32,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917903522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:32,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:32,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:32,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857126560] [2023-11-19 07:37:32,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:32,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:32,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:32,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:32,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:32,220 INFO L87 Difference]: Start difference. First operand 1079 states and 1856 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) [2023-11-19 07:37:32,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:32,362 INFO L93 Difference]: Finished difference Result 2185 states and 3748 transitions. [2023-11-19 07:37:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:32,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) Word has length 663 [2023-11-19 07:37:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:32,376 INFO L225 Difference]: With dead ends: 2185 [2023-11-19 07:37:32,376 INFO L226 Difference]: Without dead ends: 1109 [2023-11-19 07:37:32,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 661 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:32,382 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 272 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:32,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 1106 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:37:32,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2023-11-19 07:37:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 907. [2023-11-19 07:37:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 698 states have (on average 1.6446991404011462) internal successors, (1148), 698 states have internal predecessors, (1148), 204 states have call successors, (204), 4 states have call predecessors, (204), 4 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-11-19 07:37:32,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1556 transitions. [2023-11-19 07:37:32,498 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1556 transitions. Word has length 663 [2023-11-19 07:37:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:32,499 INFO L495 AbstractCegarLoop]: Abstraction has 907 states and 1556 transitions. [2023-11-19 07:37:32,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) [2023-11-19 07:37:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1556 transitions. [2023-11-19 07:37:32,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2023-11-19 07:37:32,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:32,509 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:32,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:32,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:32,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:32,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:32,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1600995855, now seen corresponding path program 1 times [2023-11-19 07:37:32,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:32,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250430614] [2023-11-19 07:37:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:32,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:32,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:32,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127494241] [2023-11-19 07:37:32,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:32,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:32,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:32,877 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:32,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:37:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:33,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:37:33,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20604 trivial. 0 not checked. [2023-11-19 07:37:35,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:35,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:35,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250430614] [2023-11-19 07:37:35,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:35,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127494241] [2023-11-19 07:37:35,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127494241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:35,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:35,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:37:35,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033891843] [2023-11-19 07:37:35,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:35,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:37:35,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:35,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:37:35,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:37:35,325 INFO L87 Difference]: Start difference. First operand 907 states and 1556 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) [2023-11-19 07:37:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:38,253 INFO L93 Difference]: Finished difference Result 4520 states and 7618 transitions. [2023-11-19 07:37:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:37:38,255 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) Word has length 663 [2023-11-19 07:37:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:38,286 INFO L225 Difference]: With dead ends: 4520 [2023-11-19 07:37:38,286 INFO L226 Difference]: Without dead ends: 3616 [2023-11-19 07:37:38,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 657 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:37:38,292 INFO L413 NwaCegarLoop]: 737 mSDtfsCounter, 1873 mSDsluCounter, 2035 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 1265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1873 SdHoareTripleChecker+Valid, 2772 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1265 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:38,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1873 Valid, 2772 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1265 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-19 07:37:38,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3616 states. [2023-11-19 07:37:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3616 to 2421. [2023-11-19 07:37:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 1870 states have (on average 1.6470588235294117) internal successors, (3080), 1872 states have internal predecessors, (3080), 538 states have call successors, (538), 12 states have call predecessors, (538), 12 states have return successors, (538), 536 states have call predecessors, (538), 538 states have call successors, (538) [2023-11-19 07:37:38,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 4156 transitions. [2023-11-19 07:37:38,689 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 4156 transitions. Word has length 663 [2023-11-19 07:37:38,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:38,691 INFO L495 AbstractCegarLoop]: Abstraction has 2421 states and 4156 transitions. [2023-11-19 07:37:38,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) [2023-11-19 07:37:38,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 4156 transitions. [2023-11-19 07:37:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2023-11-19 07:37:38,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:38,700 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:38,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:38,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:37:38,928 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:38,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:38,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2013913071, now seen corresponding path program 1 times [2023-11-19 07:37:38,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:38,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146244778] [2023-11-19 07:37:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:38,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:39,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:39,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467589370] [2023-11-19 07:37:39,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:39,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:39,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:39,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:39,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:37:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:39,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:37:39,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 897 proven. 297 refuted. 0 times theorem prover too weak. 19410 trivial. 0 not checked. [2023-11-19 07:37:44,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 6 proven. 297 refuted. 0 times theorem prover too weak. 20301 trivial. 0 not checked. [2023-11-19 07:37:46,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:46,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146244778] [2023-11-19 07:37:46,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:46,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467589370] [2023-11-19 07:37:46,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467589370] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:46,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:37:46,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-19 07:37:46,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951545668] [2023-11-19 07:37:46,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:46,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:37:46,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:46,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:37:46,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:37:46,802 INFO L87 Difference]: Start difference. First operand 2421 states and 4156 transitions. Second operand has 14 states, 14 states have (on average 22.428571428571427) internal successors, (314), 14 states have internal predecessors, (314), 4 states have call successors, (204), 3 states have call predecessors, (204), 5 states have return successors, (204), 4 states have call predecessors, (204), 4 states have call successors, (204) [2023-11-19 07:37:50,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:50,264 INFO L93 Difference]: Finished difference Result 9149 states and 15538 transitions. [2023-11-19 07:37:50,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:37:50,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 22.428571428571427) internal successors, (314), 14 states have internal predecessors, (314), 4 states have call successors, (204), 3 states have call predecessors, (204), 5 states have return successors, (204), 4 states have call predecessors, (204), 4 states have call successors, (204) Word has length 663 [2023-11-19 07:37:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:50,317 INFO L225 Difference]: With dead ends: 9149 [2023-11-19 07:37:50,317 INFO L226 Difference]: Without dead ends: 6731 [2023-11-19 07:37:50,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1340 GetRequests, 1316 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:37:50,327 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 2381 mSDsluCounter, 2307 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 1007 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2480 SdHoareTripleChecker+Valid, 2739 SdHoareTripleChecker+Invalid, 2826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1007 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:50,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2480 Valid, 2739 Invalid, 2826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1007 Valid, 1819 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-19 07:37:50,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6731 states. [2023-11-19 07:37:51,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6731 to 6469. [2023-11-19 07:37:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6469 states, 5006 states have (on average 1.6312425089892129) internal successors, (8166), 5014 states have internal predecessors, (8166), 1414 states have call successors, (1414), 48 states have call predecessors, (1414), 48 states have return successors, (1414), 1406 states have call predecessors, (1414), 1414 states have call successors, (1414) [2023-11-19 07:37:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6469 states to 6469 states and 10994 transitions. [2023-11-19 07:37:51,221 INFO L78 Accepts]: Start accepts. Automaton has 6469 states and 10994 transitions. Word has length 663 [2023-11-19 07:37:51,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:51,222 INFO L495 AbstractCegarLoop]: Abstraction has 6469 states and 10994 transitions. [2023-11-19 07:37:51,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.428571428571427) internal successors, (314), 14 states have internal predecessors, (314), 4 states have call successors, (204), 3 states have call predecessors, (204), 5 states have return successors, (204), 4 states have call predecessors, (204), 4 states have call successors, (204) [2023-11-19 07:37:51,223 INFO L276 IsEmpty]: Start isEmpty. Operand 6469 states and 10994 transitions. [2023-11-19 07:37:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2023-11-19 07:37:51,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:51,232 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:51,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:51,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:51,447 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:51,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:51,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1840434777, now seen corresponding path program 1 times [2023-11-19 07:37:51,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:51,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049762253] [2023-11-19 07:37:51,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:51,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:51,584 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:51,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826324832] [2023-11-19 07:37:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:51,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:51,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:51,586 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:51,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:37:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:52,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:37:52,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 8597 proven. 87 refuted. 0 times theorem prover too weak. 11920 trivial. 0 not checked. [2023-11-19 07:37:52,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 216 proven. 87 refuted. 0 times theorem prover too weak. 20301 trivial. 0 not checked. [2023-11-19 07:37:53,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:53,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049762253] [2023-11-19 07:37:53,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:53,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826324832] [2023-11-19 07:37:53,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826324832] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:53,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:37:53,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:37:53,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774014493] [2023-11-19 07:37:53,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:53,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:37:53,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:53,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:37:53,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:37:53,149 INFO L87 Difference]: Start difference. First operand 6469 states and 10994 transitions. Second operand has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 2 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 2 states have call predecessors, (132), 2 states have call successors, (132) [2023-11-19 07:37:54,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:54,446 INFO L93 Difference]: Finished difference Result 13059 states and 22099 transitions. [2023-11-19 07:37:54,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:37:54,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 2 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 2 states have call predecessors, (132), 2 states have call successors, (132) Word has length 664 [2023-11-19 07:37:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:54,495 INFO L225 Difference]: With dead ends: 13059 [2023-11-19 07:37:54,495 INFO L226 Difference]: Without dead ends: 6593 [2023-11-19 07:37:54,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1330 GetRequests, 1320 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:37:54,516 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 592 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:54,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1059 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:37:54,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2023-11-19 07:37:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 6509. [2023-11-19 07:37:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 5036 states have (on average 1.6115965051628276) internal successors, (8116), 5044 states have internal predecessors, (8116), 1414 states have call successors, (1414), 58 states have call predecessors, (1414), 58 states have return successors, (1414), 1406 states have call predecessors, (1414), 1414 states have call successors, (1414) [2023-11-19 07:37:55,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 10944 transitions. [2023-11-19 07:37:55,374 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 10944 transitions. Word has length 664 [2023-11-19 07:37:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:55,376 INFO L495 AbstractCegarLoop]: Abstraction has 6509 states and 10944 transitions. [2023-11-19 07:37:55,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 2 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 2 states have call predecessors, (132), 2 states have call successors, (132) [2023-11-19 07:37:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 10944 transitions. [2023-11-19 07:37:55,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 666 [2023-11-19 07:37:55,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:55,385 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:55,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:55,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:55,601 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:55,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:55,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1862370492, now seen corresponding path program 1 times [2023-11-19 07:37:55,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:55,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146129854] [2023-11-19 07:37:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:55,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:55,754 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:55,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266356029] [2023-11-19 07:37:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:55,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:55,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:55,759 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:55,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0473c84-4ab2-463d-8071-9c65ff694a8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:37:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:56,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:37:56,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20604 trivial. 0 not checked. [2023-11-19 07:37:57,455 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:57,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:57,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146129854] [2023-11-19 07:37:57,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:57,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266356029] [2023-11-19 07:37:57,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266356029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:57,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:57,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:37:57,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441145693] [2023-11-19 07:37:57,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:57,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:37:57,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:57,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:37:57,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:37:57,463 INFO L87 Difference]: Start difference. First operand 6509 states and 10944 transitions. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) [2023-11-19 07:38:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:00,201 INFO L93 Difference]: Finished difference Result 19754 states and 32942 transitions. [2023-11-19 07:38:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:38:00,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (102), 1 states have call predecessors, (102), 1 states have return successors, (102), 1 states have call predecessors, (102), 1 states have call successors, (102) Word has length 665 [2023-11-19 07:38:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:00,263 INFO L225 Difference]: With dead ends: 19754 [2023-11-19 07:38:00,264 INFO L226 Difference]: Without dead ends: 13248 [2023-11-19 07:38:00,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:38:00,288 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 1168 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 2289 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:00,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1168 Valid, 2289 Invalid, 1256 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [677 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 07:38:00,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13248 states.