./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-37.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-37.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 052da38d274e6772c0686e0d038b1089daccc0c5031079a7bc233069a41972fa --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:10:20,623 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:10:20,742 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:10:20,753 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:10:20,755 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:10:20,793 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:10:20,794 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:10:20,796 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:10:20,797 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:10:20,802 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:10:20,803 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:10:20,804 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:10:20,804 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:10:20,806 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:10:20,806 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:10:20,807 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:10:20,807 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:10:20,808 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:10:20,808 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:10:20,808 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:10:20,809 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:10:20,809 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:10:20,810 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:10:20,810 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:10:20,811 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:10:20,811 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:10:20,812 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:10:20,812 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:10:20,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:10:20,813 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:10:20,814 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:10:20,815 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:10:20,815 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:10:20,815 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:10:20,816 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:10:20,816 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:10:20,816 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:10:20,816 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:10:20,817 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:10:20,817 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_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052da38d274e6772c0686e0d038b1089daccc0c5031079a7bc233069a41972fa [2023-11-12 02:10:21,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:10:21,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:10:21,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:10:21,178 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:10:21,179 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:10:21,180 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-37.i [2023-11-12 02:10:24,290 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:10:24,582 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:10:24,582 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-37.i [2023-11-12 02:10:24,612 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/data/1af4da16c/eeb156ced5314942825d784ad2ea885f/FLAGabfafc160 [2023-11-12 02:10:24,628 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/data/1af4da16c/eeb156ced5314942825d784ad2ea885f [2023-11-12 02:10:24,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:10:24,632 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:10:24,634 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:10:24,634 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:10:24,640 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:10:24,640 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:10:24" (1/1) ... [2023-11-12 02:10:24,642 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a092817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:24, skipping insertion in model container [2023-11-12 02:10:24,642 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:10:24" (1/1) ... [2023-11-12 02:10:24,689 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:10:24,839 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_c73f8ad2-59de-4316-a9af-cee06b4268f6/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-37.i[916,929] [2023-11-12 02:10:25,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:10:25,072 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:10:25,082 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_c73f8ad2-59de-4316-a9af-cee06b4268f6/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-37.i[916,929] [2023-11-12 02:10:25,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:10:25,217 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:10:25,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:25 WrapperNode [2023-11-12 02:10:25,218 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:10:25,221 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:10:25,221 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:10:25,222 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:10:25,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:25" (1/1) ... [2023-11-12 02:10:25,267 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:25" (1/1) ... [2023-11-12 02:10:25,413 INFO L138 Inliner]: procedures = 26, calls = 108, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 613 [2023-11-12 02:10:25,413 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:10:25,414 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:10:25,414 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:10:25,415 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:10:25,431 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:25" (1/1) ... [2023-11-12 02:10:25,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:25" (1/1) ... [2023-11-12 02:10:25,447 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:25" (1/1) ... [2023-11-12 02:10:25,447 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:25" (1/1) ... [2023-11-12 02:10:25,475 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:25" (1/1) ... [2023-11-12 02:10:25,482 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:25" (1/1) ... [2023-11-12 02:10:25,489 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:25" (1/1) ... [2023-11-12 02:10:25,496 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:25" (1/1) ... [2023-11-12 02:10:25,515 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:10:25,516 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:10:25,516 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:10:25,516 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:10:25,517 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:25" (1/1) ... [2023-11-12 02:10:25,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:10:25,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:25,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:10:25,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:10:25,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:10:25,622 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:10:25,622 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:10:25,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:10:25,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:10:25,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:10:25,792 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:10:25,794 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:10:26,865 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:10:26,879 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:10:26,879 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:10:26,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:10:26 BoogieIcfgContainer [2023-11-12 02:10:26,883 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:10:26,888 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:10:26,888 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:10:26,892 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:10:26,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:10:24" (1/3) ... [2023-11-12 02:10:26,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18327df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:10:26, skipping insertion in model container [2023-11-12 02:10:26,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:25" (2/3) ... [2023-11-12 02:10:26,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18327df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:10:26, skipping insertion in model container [2023-11-12 02:10:26,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:10:26" (3/3) ... [2023-11-12 02:10:26,895 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-37.i [2023-11-12 02:10:26,916 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:10:26,916 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:10:26,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:10:27,001 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;@3eba09fe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:10:27,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:10:27,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 147 states have (on average 1.530612244897959) internal successors, (225), 148 states have internal predecessors, (225), 95 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-12 02:10:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2023-11-12 02:10:27,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:27,065 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:27,066 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:27,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:27,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1097152103, now seen corresponding path program 1 times [2023-11-12 02:10:27,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:27,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606735862] [2023-11-12 02:10:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:27,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:27,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:27,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606735862] [2023-11-12 02:10:27,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:10:27,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177314598] [2023-11-12 02:10:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:27,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:27,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:27,681 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:27,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:10:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:28,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:10:28,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 17672 trivial. 0 not checked. [2023-11-12 02:10:28,384 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:10:28,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177314598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:28,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:28,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:10:28,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440279042] [2023-11-12 02:10:28,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:28,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:10:28,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:28,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:10:28,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:10:28,432 INFO L87 Difference]: Start difference. First operand has 245 states, 147 states have (on average 1.530612244897959) internal successors, (225), 148 states have internal predecessors, (225), 95 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 2 states, 2 states have (on average 57.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 2 states have call successors, (95) [2023-11-12 02:10:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:28,523 INFO L93 Difference]: Finished difference Result 483 states and 919 transitions. [2023-11-12 02:10:28,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:10:28,526 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 57.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 2 states have call successors, (95) Word has length 584 [2023-11-12 02:10:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:28,538 INFO L225 Difference]: With dead ends: 483 [2023-11-12 02:10:28,539 INFO L226 Difference]: Without dead ends: 241 [2023-11-12 02:10:28,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 583 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:10:28,551 INFO L413 NwaCegarLoop]: 405 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, 405 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:28,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:10:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-12 02:10:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2023-11-12 02:10:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 144 states have (on average 1.4930555555555556) internal successors, (215), 144 states have internal predecessors, (215), 95 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-12 02:10:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 405 transitions. [2023-11-12 02:10:28,661 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 405 transitions. Word has length 584 [2023-11-12 02:10:28,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:28,662 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 405 transitions. [2023-11-12 02:10:28,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 57.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 2 states have call successors, (95) [2023-11-12 02:10:28,663 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 405 transitions. [2023-11-12 02:10:28,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2023-11-12 02:10:28,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:28,680 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:28,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:28,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:10:28,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:28,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:28,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1638337555, now seen corresponding path program 1 times [2023-11-12 02:10:28,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:28,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025413379] [2023-11-12 02:10:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:28,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:29,096 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:10:29,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104447037] [2023-11-12 02:10:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:29,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:29,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:29,099 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:29,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:10:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:29,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:10:29,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-11-12 02:10:29,779 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:10:29,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:29,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025413379] [2023-11-12 02:10:29,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:10:29,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104447037] [2023-11-12 02:10:29,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104447037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:29,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:29,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:10:29,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811297205] [2023-11-12 02:10:29,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:29,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:10:29,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:29,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:10:29,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:10:29,786 INFO L87 Difference]: Start difference. First operand 241 states and 405 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-12 02:10:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:30,150 INFO L93 Difference]: Finished difference Result 635 states and 1071 transitions. [2023-11-12 02:10:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:10:30,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 584 [2023-11-12 02:10:30,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:30,160 INFO L225 Difference]: With dead ends: 635 [2023-11-12 02:10:30,160 INFO L226 Difference]: Without dead ends: 397 [2023-11-12 02:10:30,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:10:30,165 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 251 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:30,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1154 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:10:30,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-11-12 02:10:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 394. [2023-11-12 02:10:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 242 states have (on average 1.5206611570247934) internal successors, (368), 243 states have internal predecessors, (368), 149 states have call successors, (149), 2 states have call predecessors, (149), 2 states have return successors, (149), 148 states have call predecessors, (149), 149 states have call successors, (149) [2023-11-12 02:10:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 666 transitions. [2023-11-12 02:10:30,269 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 666 transitions. Word has length 584 [2023-11-12 02:10:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:30,271 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 666 transitions. [2023-11-12 02:10:30,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-12 02:10:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 666 transitions. [2023-11-12 02:10:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2023-11-12 02:10:30,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:30,290 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:30,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:30,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:30,499 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:30,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:30,500 INFO L85 PathProgramCache]: Analyzing trace with hash 607241899, now seen corresponding path program 1 times [2023-11-12 02:10:30,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:30,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340888381] [2023-11-12 02:10:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:30,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:30,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:10:30,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855293208] [2023-11-12 02:10:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:30,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:30,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:30,644 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:30,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:10:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:31,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:10:31,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-11-12 02:10:31,187 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:10:31,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:31,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340888381] [2023-11-12 02:10:31,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:10:31,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855293208] [2023-11-12 02:10:31,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855293208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:31,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:31,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:10:31,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283921175] [2023-11-12 02:10:31,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:31,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:10:31,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:10:31,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:10:31,196 INFO L87 Difference]: Start difference. First operand 394 states and 666 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-12 02:10:31,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:31,286 INFO L93 Difference]: Finished difference Result 1038 states and 1755 transitions. [2023-11-12 02:10:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:10:31,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 584 [2023-11-12 02:10:31,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:31,300 INFO L225 Difference]: With dead ends: 1038 [2023-11-12 02:10:31,300 INFO L226 Difference]: Without dead ends: 647 [2023-11-12 02:10:31,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:10:31,306 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 207 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:31,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 956 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:10:31,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2023-11-12 02:10:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 643. [2023-11-12 02:10:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 409 states have (on average 1.533007334963325) internal successors, (627), 412 states have internal predecessors, (627), 229 states have call successors, (229), 4 states have call predecessors, (229), 4 states have return successors, (229), 226 states have call predecessors, (229), 229 states have call successors, (229) [2023-11-12 02:10:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1085 transitions. [2023-11-12 02:10:31,427 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1085 transitions. Word has length 584 [2023-11-12 02:10:31,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:31,430 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 1085 transitions. [2023-11-12 02:10:31,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-12 02:10:31,431 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1085 transitions. [2023-11-12 02:10:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2023-11-12 02:10:31,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:31,440 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:31,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:31,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:31,649 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:31,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:31,649 INFO L85 PathProgramCache]: Analyzing trace with hash -764565399, now seen corresponding path program 1 times [2023-11-12 02:10:31,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:31,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656488945] [2023-11-12 02:10:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:31,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:31,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:10:31,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622096241] [2023-11-12 02:10:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:31,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:31,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:31,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:31,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:10:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:32,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 1343 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:10:32,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-11-12 02:10:32,287 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:10:32,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:32,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656488945] [2023-11-12 02:10:32,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:10:32,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622096241] [2023-11-12 02:10:32,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622096241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:32,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:32,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:10:32,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877833661] [2023-11-12 02:10:32,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:32,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:10:32,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:32,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:10:32,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:10:32,293 INFO L87 Difference]: Start difference. First operand 643 states and 1085 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-12 02:10:32,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:32,374 INFO L93 Difference]: Finished difference Result 1295 states and 2176 transitions. [2023-11-12 02:10:32,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:10:32,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 584 [2023-11-12 02:10:32,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:32,382 INFO L225 Difference]: With dead ends: 1295 [2023-11-12 02:10:32,382 INFO L226 Difference]: Without dead ends: 655 [2023-11-12 02:10:32,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:10:32,392 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 189 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:32,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 806 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:10:32,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2023-11-12 02:10:32,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 475. [2023-11-12 02:10:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 321 states have (on average 1.5794392523364487) internal successors, (507), 322 states have internal predecessors, (507), 149 states have call successors, (149), 4 states have call predecessors, (149), 4 states have return successors, (149), 148 states have call predecessors, (149), 149 states have call successors, (149) [2023-11-12 02:10:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 805 transitions. [2023-11-12 02:10:32,455 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 805 transitions. Word has length 584 [2023-11-12 02:10:32,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:32,459 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 805 transitions. [2023-11-12 02:10:32,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-12 02:10:32,459 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 805 transitions. [2023-11-12 02:10:32,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2023-11-12 02:10:32,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:32,466 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:32,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:32,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:32,674 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:32,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1785633753, now seen corresponding path program 1 times [2023-11-12 02:10:32,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:32,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031987013] [2023-11-12 02:10:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:32,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:32,813 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:10:32,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717212285] [2023-11-12 02:10:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:32,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:32,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:32,815 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:32,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:10:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:33,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:10:33,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-11-12 02:10:34,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:10:34,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:34,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031987013] [2023-11-12 02:10:34,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:10:34,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717212285] [2023-11-12 02:10:34,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717212285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:34,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:34,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:10:34,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012669010] [2023-11-12 02:10:34,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:34,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:10:34,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:10:34,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:10:34,260 INFO L87 Difference]: Start difference. First operand 475 states and 805 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-12 02:10:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:34,675 INFO L93 Difference]: Finished difference Result 1421 states and 2413 transitions. [2023-11-12 02:10:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:10:34,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 584 [2023-11-12 02:10:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:34,686 INFO L225 Difference]: With dead ends: 1421 [2023-11-12 02:10:34,686 INFO L226 Difference]: Without dead ends: 949 [2023-11-12 02:10:34,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:10:34,689 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 117 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:34,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1008 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:10:34,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2023-11-12 02:10:34,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 947. [2023-11-12 02:10:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 640 states have (on average 1.58125) internal successors, (1012), 642 states have internal predecessors, (1012), 298 states have call successors, (298), 8 states have call predecessors, (298), 8 states have return successors, (298), 296 states have call predecessors, (298), 298 states have call successors, (298) [2023-11-12 02:10:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1608 transitions. [2023-11-12 02:10:34,810 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1608 transitions. Word has length 584 [2023-11-12 02:10:34,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:34,812 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1608 transitions. [2023-11-12 02:10:34,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-12 02:10:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1608 transitions. [2023-11-12 02:10:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2023-11-12 02:10:34,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:34,818 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:34,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 02:10:35,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:35,027 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:35,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:35,027 INFO L85 PathProgramCache]: Analyzing trace with hash 189177951, now seen corresponding path program 1 times [2023-11-12 02:10:35,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:35,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610340288] [2023-11-12 02:10:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:35,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:35,129 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:10:35,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561068593] [2023-11-12 02:10:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:35,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:35,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:35,131 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:35,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:10:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:35,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:10:35,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 9034 proven. 96 refuted. 0 times theorem prover too weak. 8730 trivial. 0 not checked. [2023-11-12 02:10:36,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 186 proven. 96 refuted. 0 times theorem prover too weak. 17578 trivial. 0 not checked. [2023-11-12 02:10:36,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:36,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610340288] [2023-11-12 02:10:36,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:10:36,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561068593] [2023-11-12 02:10:36,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561068593] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:36,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:10:36,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-12 02:10:36,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721791524] [2023-11-12 02:10:36,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:37,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:10:37,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:37,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:10:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:10:37,002 INFO L87 Difference]: Start difference. First operand 947 states and 1608 transitions. Second operand has 10 states, 10 states have (on average 16.1) internal successors, (161), 10 states have internal predecessors, (161), 5 states have call successors, (127), 3 states have call predecessors, (127), 5 states have return successors, (128), 5 states have call predecessors, (128), 5 states have call successors, (128) [2023-11-12 02:10:37,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:37,887 INFO L93 Difference]: Finished difference Result 1927 states and 3245 transitions. [2023-11-12 02:10:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:10:37,888 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.1) internal successors, (161), 10 states have internal predecessors, (161), 5 states have call successors, (127), 3 states have call predecessors, (127), 5 states have return successors, (128), 5 states have call predecessors, (128), 5 states have call successors, (128) Word has length 585 [2023-11-12 02:10:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:37,898 INFO L225 Difference]: With dead ends: 1927 [2023-11-12 02:10:37,899 INFO L226 Difference]: Without dead ends: 983 [2023-11-12 02:10:37,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1175 GetRequests, 1160 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:10:37,905 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 414 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:37,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 734 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:10:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2023-11-12 02:10:38,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 963. [2023-11-12 02:10:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 652 states have (on average 1.5460122699386503) internal successors, (1008), 654 states have internal predecessors, (1008), 298 states have call successors, (298), 12 states have call predecessors, (298), 12 states have return successors, (298), 296 states have call predecessors, (298), 298 states have call successors, (298) [2023-11-12 02:10:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1604 transitions. [2023-11-12 02:10:38,081 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1604 transitions. Word has length 585 [2023-11-12 02:10:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:38,082 INFO L495 AbstractCegarLoop]: Abstraction has 963 states and 1604 transitions. [2023-11-12 02:10:38,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.1) internal successors, (161), 10 states have internal predecessors, (161), 5 states have call successors, (127), 3 states have call predecessors, (127), 5 states have return successors, (128), 5 states have call predecessors, (128), 5 states have call successors, (128) [2023-11-12 02:10:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1604 transitions. [2023-11-12 02:10:38,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2023-11-12 02:10:38,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:38,089 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:38,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:38,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:10:38,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:38,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:38,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1752842165, now seen corresponding path program 1 times [2023-11-12 02:10:38,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:38,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621921944] [2023-11-12 02:10:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:38,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:38,414 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:10:38,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292796520] [2023-11-12 02:10:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:38,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:38,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:38,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:38,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:10:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:38,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 1348 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:10:38,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 9070 proven. 270 refuted. 0 times theorem prover too weak. 8520 trivial. 0 not checked. [2023-11-12 02:10:40,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 288 proven. 273 refuted. 0 times theorem prover too weak. 17299 trivial. 0 not checked. [2023-11-12 02:10:42,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:42,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621921944] [2023-11-12 02:10:42,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:10:42,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292796520] [2023-11-12 02:10:42,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292796520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:42,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:10:42,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-11-12 02:10:42,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483704135] [2023-11-12 02:10:42,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:42,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:10:42,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:42,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:10:42,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:10:42,510 INFO L87 Difference]: Start difference. First operand 963 states and 1604 transitions. Second operand has 20 states, 19 states have (on average 10.473684210526315) internal successors, (199), 18 states have internal predecessors, (199), 6 states have call successors, (190), 4 states have call predecessors, (190), 7 states have return successors, (190), 6 states have call predecessors, (190), 6 states have call successors, (190) [2023-11-12 02:10:49,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:49,843 INFO L93 Difference]: Finished difference Result 9929 states and 16677 transitions. [2023-11-12 02:10:49,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-12 02:10:49,848 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 10.473684210526315) internal successors, (199), 18 states have internal predecessors, (199), 6 states have call successors, (190), 4 states have call predecessors, (190), 7 states have return successors, (190), 6 states have call predecessors, (190), 6 states have call successors, (190) Word has length 586 [2023-11-12 02:10:49,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:49,920 INFO L225 Difference]: With dead ends: 9929 [2023-11-12 02:10:49,921 INFO L226 Difference]: Without dead ends: 8969 [2023-11-12 02:10:49,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1208 GetRequests, 1158 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=859, Invalid=1793, Unknown=0, NotChecked=0, Total=2652 [2023-11-12 02:10:49,930 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 3532 mSDsluCounter, 3457 mSDsCounter, 0 mSdLazyCounter, 3740 mSolverCounterSat, 1578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3717 SdHoareTripleChecker+Valid, 3811 SdHoareTripleChecker+Invalid, 5318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1578 IncrementalHoareTripleChecker+Valid, 3740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:49,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3717 Valid, 3811 Invalid, 5318 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1578 Valid, 3740 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-12 02:10:49,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8969 states. [2023-11-12 02:10:50,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8969 to 5257. [2023-11-12 02:10:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 3892 states have (on average 1.6038026721479959) internal successors, (6242), 3916 states have internal predecessors, (6242), 1300 states have call successors, (1300), 64 states have call predecessors, (1300), 64 states have return successors, (1300), 1276 states have call predecessors, (1300), 1300 states have call successors, (1300) [2023-11-12 02:10:50,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 8842 transitions. [2023-11-12 02:10:50,884 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 8842 transitions. Word has length 586 [2023-11-12 02:10:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:50,885 INFO L495 AbstractCegarLoop]: Abstraction has 5257 states and 8842 transitions. [2023-11-12 02:10:50,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 10.473684210526315) internal successors, (199), 18 states have internal predecessors, (199), 6 states have call successors, (190), 4 states have call predecessors, (190), 7 states have return successors, (190), 6 states have call predecessors, (190), 6 states have call successors, (190) [2023-11-12 02:10:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 8842 transitions. [2023-11-12 02:10:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2023-11-12 02:10:50,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:50,897 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:50,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:51,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:10:51,107 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:51,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1648638793, now seen corresponding path program 1 times [2023-11-12 02:10:51,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:51,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143255731] [2023-11-12 02:10:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:51,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:51,197 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:10:51,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824380614] [2023-11-12 02:10:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:51,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:51,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:51,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:51,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:10:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:51,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 1350 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:10:51,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 7834 proven. 192 refuted. 0 times theorem prover too weak. 9834 trivial. 0 not checked. [2023-11-12 02:10:55,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:57,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:57,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143255731] [2023-11-12 02:10:57,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:10:57,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824380614] [2023-11-12 02:10:57,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824380614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:57,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:10:57,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-11-12 02:10:57,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449921235] [2023-11-12 02:10:57,057 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:57,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:10:57,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:57,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:10:57,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:10:57,059 INFO L87 Difference]: Start difference. First operand 5257 states and 8842 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (95), 2 states have call predecessors, (95), 3 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2023-11-12 02:10:59,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:59,145 INFO L93 Difference]: Finished difference Result 15897 states and 26615 transitions. [2023-11-12 02:10:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:10:59,146 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (95), 2 states have call predecessors, (95), 3 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) Word has length 586 [2023-11-12 02:10:59,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:59,223 INFO L225 Difference]: With dead ends: 15897 [2023-11-12 02:10:59,223 INFO L226 Difference]: Without dead ends: 10643 [2023-11-12 02:10:59,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 987 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:10:59,242 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 596 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:59,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 1441 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:10:59,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10643 states. [2023-11-12 02:11:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10643 to 10527. [2023-11-12 02:11:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10527 states, 7920 states have (on average 1.6022727272727273) internal successors, (12690), 7974 states have internal predecessors, (12690), 2470 states have call successors, (2470), 136 states have call predecessors, (2470), 136 states have return successors, (2470), 2416 states have call predecessors, (2470), 2470 states have call successors, (2470) [2023-11-12 02:11:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10527 states to 10527 states and 17630 transitions. [2023-11-12 02:11:00,620 INFO L78 Accepts]: Start accepts. Automaton has 10527 states and 17630 transitions. Word has length 586 [2023-11-12 02:11:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:00,621 INFO L495 AbstractCegarLoop]: Abstraction has 10527 states and 17630 transitions. [2023-11-12 02:11:00,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (95), 2 states have call predecessors, (95), 3 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2023-11-12 02:11:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand 10527 states and 17630 transitions. [2023-11-12 02:11:00,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2023-11-12 02:11:00,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:00,636 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:00,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:00,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:00,845 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:00,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:00,845 INFO L85 PathProgramCache]: Analyzing trace with hash 382129140, now seen corresponding path program 1 times [2023-11-12 02:11:00,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:00,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780114905] [2023-11-12 02:11:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:00,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:00,921 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:11:00,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196426613] [2023-11-12 02:11:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:00,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:00,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:00,923 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:00,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:11:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:01,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 1352 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:11:01,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-11-12 02:11:01,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:01,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:01,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780114905] [2023-11-12 02:11:01,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:11:01,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196426613] [2023-11-12 02:11:01,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196426613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:01,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:01,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:11:01,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113504418] [2023-11-12 02:11:01,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:01,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:01,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:01,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:01,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:01,541 INFO L87 Difference]: Start difference. First operand 10527 states and 17630 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-12 02:11:02,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:02,876 INFO L93 Difference]: Finished difference Result 23201 states and 38708 transitions. [2023-11-12 02:11:02,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:02,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 586 [2023-11-12 02:11:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:02,949 INFO L225 Difference]: With dead ends: 23201 [2023-11-12 02:11:02,949 INFO L226 Difference]: Without dead ends: 17953 [2023-11-12 02:11:02,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:02,971 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 191 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:02,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 909 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:02,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17953 states. [2023-11-12 02:11:04,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17953 to 17927. [2023-11-12 02:11:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17927 states, 13434 states have (on average 1.5840404942682744) internal successors, (21280), 13540 states have internal predecessors, (21280), 4258 states have call successors, (4258), 234 states have call predecessors, (4258), 234 states have return successors, (4258), 4152 states have call predecessors, (4258), 4258 states have call successors, (4258) [2023-11-12 02:11:04,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 29796 transitions. [2023-11-12 02:11:04,753 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 29796 transitions. Word has length 586 [2023-11-12 02:11:04,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:04,755 INFO L495 AbstractCegarLoop]: Abstraction has 17927 states and 29796 transitions. [2023-11-12 02:11:04,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 1 states have call successors, (95), 1 states have call predecessors, (95), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2023-11-12 02:11:04,755 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 29796 transitions. [2023-11-12 02:11:04,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2023-11-12 02:11:04,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:04,775 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:04,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:04,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:04,983 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:04,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:04,984 INFO L85 PathProgramCache]: Analyzing trace with hash 989107271, now seen corresponding path program 1 times [2023-11-12 02:11:04,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:04,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334422103] [2023-11-12 02:11:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:04,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:05,062 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:11:05,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104758880] [2023-11-12 02:11:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:05,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:05,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:05,064 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:05,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73f8ad2-59de-4316-a9af-cee06b4268f6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:11:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:05,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 1352 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:11:05,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 8154 proven. 96 refuted. 0 times theorem prover too weak. 9610 trivial. 0 not checked. [2023-11-12 02:11:07,072 INFO L327 TraceCheckSpWp]: Computing backward predicates...