./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd --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 964037bccd5af2bec8208ce0f4b08447d41303350ff91bfe4b13e42b362dc54b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 12:43:58,653 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 12:43:58,737 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 12:43:58,743 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 12:43:58,743 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 12:43:58,789 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 12:43:58,790 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 12:43:58,790 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 12:43:58,791 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 12:43:58,791 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 12:43:58,791 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 12:43:58,791 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 12:43:58,792 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 12:43:58,793 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 12:43:58,794 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 12:43:58,794 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 12:43:58,795 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 12:43:58,795 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 12:43:58,795 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 12:43:58,796 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 12:43:58,796 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 12:43:58,796 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 12:43:58,797 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 12:43:58,797 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 12:43:58,797 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 12:43:58,797 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 12:43:58,797 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 12:43:58,797 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 12:43:58,797 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 12:43:58,797 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 12:43:58,798 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 12:43:58,798 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 12:43:58,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:43:58,798 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 12:43:58,798 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 12:43:58,798 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 12:43:58,798 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 12:43:58,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 12:43:58,798 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 12:43:58,798 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 12:43:58,798 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 12:43:58,799 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 12:43:58,799 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd 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 -> 964037bccd5af2bec8208ce0f4b08447d41303350ff91bfe4b13e42b362dc54b [2024-11-13 12:43:59,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 12:43:59,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 12:43:59,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 12:43:59,199 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 12:43:59,199 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 12:43:59,201 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c Unable to find full path for "g++" [2024-11-13 12:44:01,212 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 12:44:01,504 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 12:44:01,505 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c [2024-11-13 12:44:01,516 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/data/d857767a0/4c13399b7d7c442fb386aff1c20238f8/FLAG530fbe717 [2024-11-13 12:44:01,534 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/data/d857767a0/4c13399b7d7c442fb386aff1c20238f8 [2024-11-13 12:44:01,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 12:44:01,538 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 12:44:01,540 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 12:44:01,540 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 12:44:01,546 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 12:44:01,547 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:44:01" (1/1) ... [2024-11-13 12:44:01,548 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@642abd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:01, skipping insertion in model container [2024-11-13 12:44:01,549 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:44:01" (1/1) ... [2024-11-13 12:44:01,580 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:44:01,801 WARN L250 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_ef6e7949-2d00-42b7-b3f7-f2500302bb58/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[1999,2012] [2024-11-13 12:44:01,811 WARN L250 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_ef6e7949-2d00-42b7-b3f7-f2500302bb58/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[2393,2406] [2024-11-13 12:44:01,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:44:01,893 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 12:44:01,909 WARN L250 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_ef6e7949-2d00-42b7-b3f7-f2500302bb58/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[1999,2012] [2024-11-13 12:44:01,911 WARN L250 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_ef6e7949-2d00-42b7-b3f7-f2500302bb58/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[2393,2406] [2024-11-13 12:44:01,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:44:02,004 INFO L204 MainTranslator]: Completed translation [2024-11-13 12:44:02,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:02 WrapperNode [2024-11-13 12:44:02,006 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 12:44:02,008 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 12:44:02,008 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 12:44:02,008 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 12:44:02,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:02" (1/1) ... [2024-11-13 12:44:02,033 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:02" (1/1) ... [2024-11-13 12:44:02,086 INFO L138 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 211 [2024-11-13 12:44:02,087 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 12:44:02,087 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 12:44:02,088 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 12:44:02,088 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 12:44:02,099 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:02" (1/1) ... [2024-11-13 12:44:02,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:02" (1/1) ... [2024-11-13 12:44:02,106 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:02" (1/1) ... [2024-11-13 12:44:02,135 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-13 12:44:02,136 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:02" (1/1) ... [2024-11-13 12:44:02,139 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:02" (1/1) ... [2024-11-13 12:44:02,150 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:02" (1/1) ... [2024-11-13 12:44:02,160 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:02" (1/1) ... [2024-11-13 12:44:02,165 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:02" (1/1) ... [2024-11-13 12:44:02,166 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:02" (1/1) ... [2024-11-13 12:44:02,171 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 12:44:02,173 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 12:44:02,174 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 12:44:02,175 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 12:44:02,176 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:02" (1/1) ... [2024-11-13 12:44:02,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:44:02,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:02,219 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 12:44:02,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 12:44:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 12:44:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-13 12:44:02,258 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-13 12:44:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 12:44:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 12:44:02,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 12:44:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 12:44:02,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 12:44:02,367 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 12:44:02,369 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 12:44:02,928 INFO L? ?]: Removed 81 outVars from TransFormulas that were not future-live. [2024-11-13 12:44:02,929 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 12:44:02,950 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 12:44:02,951 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 12:44:02,952 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:44:02 BoogieIcfgContainer [2024-11-13 12:44:02,952 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 12:44:02,956 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 12:44:02,957 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 12:44:02,965 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 12:44:02,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 12:44:01" (1/3) ... [2024-11-13 12:44:02,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3450f0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:44:02, skipping insertion in model container [2024-11-13 12:44:02,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:02" (2/3) ... [2024-11-13 12:44:02,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3450f0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:44:02, skipping insertion in model container [2024-11-13 12:44:02,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:44:02" (3/3) ... [2024-11-13 12:44:02,968 INFO L112 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_1-2a.c.cil.c [2024-11-13 12:44:02,984 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 12:44:02,988 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG square_4+soft_float_1-2a.c.cil.c that has 3 procedures, 105 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-13 12:44:03,062 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 12:44:03,077 INFO L333 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, 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;@899d2eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 12:44:03,077 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-13 12:44:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 92 states have (on average 1.576086956521739) internal successors, (145), 96 states have internal predecessors, (145), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 12:44:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 12:44:03,090 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:03,091 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:03,092 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:44:03,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:03,097 INFO L85 PathProgramCache]: Analyzing trace with hash -929888677, now seen corresponding path program 1 times [2024-11-13 12:44:03,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:03,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390330233] [2024-11-13 12:44:03,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:03,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 12:44:03,213 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 12:44:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 12:44:03,278 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-13 12:44:03,280 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 12:44:03,285 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-11-13 12:44:03,288 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-13 12:44:03,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 12:44:03,294 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-13 12:44:03,317 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-13 12:44:03,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 12:44:03 BoogieIcfgContainer [2024-11-13 12:44:03,326 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-13 12:44:03,327 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 12:44:03,327 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 12:44:03,327 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 12:44:03,329 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:44:02" (3/4) ... [2024-11-13 12:44:03,333 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-13 12:44:03,334 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 12:44:03,338 INFO L158 Benchmark]: Toolchain (without parser) took 1796.77ms. Allocated memory is still 117.4MB. Free memory was 92.0MB in the beginning and 89.3MB in the end (delta: 2.7MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. [2024-11-13 12:44:03,339 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory is still 73.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:44:03,339 INFO L158 Benchmark]: CACSL2BoogieTranslator took 467.11ms. Allocated memory is still 117.4MB. Free memory was 91.7MB in the beginning and 76.9MB in the end (delta: 14.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 12:44:03,339 INFO L158 Benchmark]: Boogie Procedure Inliner took 79.08ms. Allocated memory is still 117.4MB. Free memory was 76.9MB in the beginning and 74.9MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:44:03,340 INFO L158 Benchmark]: Boogie Preprocessor took 85.41ms. Allocated memory is still 117.4MB. Free memory was 74.9MB in the beginning and 72.8MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:44:03,340 INFO L158 Benchmark]: RCFGBuilder took 778.58ms. Allocated memory is still 117.4MB. Free memory was 72.8MB in the beginning and 49.4MB in the end (delta: 23.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-13 12:44:03,341 INFO L158 Benchmark]: TraceAbstraction took 370.04ms. Allocated memory is still 117.4MB. Free memory was 48.8MB in the beginning and 89.3MB in the end (delta: -40.5MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. [2024-11-13 12:44:03,341 INFO L158 Benchmark]: Witness Printer took 6.92ms. Allocated memory is still 117.4MB. Free memory was 89.3MB in the beginning and 89.3MB in the end (delta: 21.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:44:03,348 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory is still 73.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 467.11ms. Allocated memory is still 117.4MB. Free memory was 91.7MB in the beginning and 76.9MB in the end (delta: 14.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 79.08ms. Allocated memory is still 117.4MB. Free memory was 76.9MB in the beginning and 74.9MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 85.41ms. Allocated memory is still 117.4MB. Free memory was 74.9MB in the beginning and 72.8MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 778.58ms. Allocated memory is still 117.4MB. Free memory was 72.8MB in the beginning and 49.4MB in the end (delta: 23.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 370.04ms. Allocated memory is still 117.4MB. Free memory was 48.8MB in the beginning and 89.3MB in the end (delta: -40.5MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. * Witness Printer took 6.92ms. Allocated memory is still 117.4MB. Free memory was 89.3MB in the beginning and 89.3MB in the end (delta: 21.1kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryFLOATComparisonOperation at line 40, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L403] COND TRUE __VERIFIER_nondet_int() [L404] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L47] COND TRUE !(result >= 0.0f && result < 1.39844f) [L48] reach_error() - UnprovableResult [Line: 61]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 105 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-13 12:44:03,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd --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 964037bccd5af2bec8208ce0f4b08447d41303350ff91bfe4b13e42b362dc54b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 12:44:06,401 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 12:44:06,549 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-13 12:44:06,559 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 12:44:06,559 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 12:44:06,622 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 12:44:06,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 12:44:06,627 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 12:44:06,627 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 12:44:06,628 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 12:44:06,629 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 12:44:06,629 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 12:44:06,629 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 12:44:06,631 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 12:44:06,631 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 12:44:06,631 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 12:44:06,631 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 12:44:06,632 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 12:44:06,632 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 12:44:06,632 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 12:44:06,632 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 12:44:06,632 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 12:44:06,632 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 12:44:06,632 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 12:44:06,632 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 12:44:06,633 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 12:44:06,633 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 12:44:06,633 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 12:44:06,633 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 12:44:06,633 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 12:44:06,633 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 12:44:06,634 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 12:44:06,634 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 12:44:06,634 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 12:44:06,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:44:06,634 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 12:44:06,634 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 12:44:06,634 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 12:44:06,635 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-13 12:44:06,635 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 12:44:06,635 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 12:44:06,635 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 12:44:06,635 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 12:44:06,635 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 12:44:06,635 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd 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 -> 964037bccd5af2bec8208ce0f4b08447d41303350ff91bfe4b13e42b362dc54b [2024-11-13 12:44:06,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 12:44:06,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 12:44:06,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 12:44:06,975 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 12:44:06,975 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 12:44:06,976 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c Unable to find full path for "g++" [2024-11-13 12:44:09,352 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 12:44:09,714 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 12:44:09,715 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c [2024-11-13 12:44:09,733 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/data/c6d403a23/0cd960a60c70464b8ca8fa36d719dd68/FLAGe3b9b411c [2024-11-13 12:44:09,753 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/data/c6d403a23/0cd960a60c70464b8ca8fa36d719dd68 [2024-11-13 12:44:09,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 12:44:09,760 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 12:44:09,762 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 12:44:09,763 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 12:44:09,768 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 12:44:09,769 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:44:09" (1/1) ... [2024-11-13 12:44:09,771 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@516335f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:09, skipping insertion in model container [2024-11-13 12:44:09,771 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:44:09" (1/1) ... [2024-11-13 12:44:09,807 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:44:10,027 WARN L250 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_ef6e7949-2d00-42b7-b3f7-f2500302bb58/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[1999,2012] [2024-11-13 12:44:10,034 WARN L250 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_ef6e7949-2d00-42b7-b3f7-f2500302bb58/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[2393,2406] [2024-11-13 12:44:10,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:44:10,147 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 12:44:10,163 WARN L250 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_ef6e7949-2d00-42b7-b3f7-f2500302bb58/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[1999,2012] [2024-11-13 12:44:10,169 WARN L250 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_ef6e7949-2d00-42b7-b3f7-f2500302bb58/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[2393,2406] [2024-11-13 12:44:10,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:44:10,251 INFO L204 MainTranslator]: Completed translation [2024-11-13 12:44:10,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:10 WrapperNode [2024-11-13 12:44:10,251 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 12:44:10,252 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 12:44:10,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 12:44:10,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 12:44:10,262 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:10" (1/1) ... [2024-11-13 12:44:10,282 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:10" (1/1) ... [2024-11-13 12:44:10,317 INFO L138 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 168 [2024-11-13 12:44:10,318 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 12:44:10,318 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 12:44:10,318 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 12:44:10,319 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 12:44:10,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:10" (1/1) ... [2024-11-13 12:44:10,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:10" (1/1) ... [2024-11-13 12:44:10,338 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:10" (1/1) ... [2024-11-13 12:44:10,361 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-13 12:44:10,361 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:10" (1/1) ... [2024-11-13 12:44:10,361 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:10" (1/1) ... [2024-11-13 12:44:10,378 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:10" (1/1) ... [2024-11-13 12:44:10,387 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:10" (1/1) ... [2024-11-13 12:44:10,389 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:10" (1/1) ... [2024-11-13 12:44:10,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:10" (1/1) ... [2024-11-13 12:44:10,401 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 12:44:10,402 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 12:44:10,402 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 12:44:10,402 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 12:44:10,403 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:10" (1/1) ... [2024-11-13 12:44:10,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:44:10,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:10,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 12:44:10,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 12:44:10,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 12:44:10,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-13 12:44:10,487 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-13 12:44:10,487 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-13 12:44:10,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 12:44:10,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 12:44:10,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 12:44:10,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 12:44:10,644 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 12:44:10,647 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 12:44:15,551 INFO L? ?]: Removed 65 outVars from TransFormulas that were not future-live. [2024-11-13 12:44:15,551 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 12:44:15,571 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 12:44:15,572 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 12:44:15,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:44:15 BoogieIcfgContainer [2024-11-13 12:44:15,572 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 12:44:15,576 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 12:44:15,576 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 12:44:15,580 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 12:44:15,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 12:44:09" (1/3) ... [2024-11-13 12:44:15,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc91bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:44:15, skipping insertion in model container [2024-11-13 12:44:15,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:10" (2/3) ... [2024-11-13 12:44:15,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc91bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:44:15, skipping insertion in model container [2024-11-13 12:44:15,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:44:15" (3/3) ... [2024-11-13 12:44:15,584 INFO L112 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_1-2a.c.cil.c [2024-11-13 12:44:15,601 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 12:44:15,603 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG square_4+soft_float_1-2a.c.cil.c that has 3 procedures, 81 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-13 12:44:15,663 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 12:44:15,678 INFO L333 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, 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;@c4d1fc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 12:44:15,678 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-13 12:44:15,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 12:44:15,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 12:44:15,691 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:15,691 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:15,692 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:44:15,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:15,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1912677092, now seen corresponding path program 1 times [2024-11-13 12:44:15,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:44:15,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315109060] [2024-11-13 12:44:15,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:15,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-13 12:44:15,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/mathsat [2024-11-13 12:44:15,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-13 12:44:15,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-13 12:44:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:16,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-13 12:44:16,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:16,272 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:44:16,273 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:44:16,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315109060] [2024-11-13 12:44:16,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315109060] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:16,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:16,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:44:16,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986917881] [2024-11-13 12:44:16,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:16,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 12:44:16,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:44:16,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 12:44:16,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 12:44:16,300 INFO L87 Difference]: Start difference. First operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:16,325 INFO L93 Difference]: Finished difference Result 157 states and 248 transitions. [2024-11-13 12:44:16,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 12:44:16,327 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-13 12:44:16,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:16,334 INFO L225 Difference]: With dead ends: 157 [2024-11-13 12:44:16,334 INFO L226 Difference]: Without dead ends: 74 [2024-11-13 12:44:16,337 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 12:44:16,340 INFO L432 NwaCegarLoop]: 116 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, 116 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 [2024-11-13 12:44:16,341 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:44:16,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-13 12:44:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-13 12:44:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 65 states have internal predecessors, (92), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-13 12:44:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 107 transitions. [2024-11-13 12:44:16,384 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 107 transitions. Word has length 7 [2024-11-13 12:44:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:16,385 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 107 transitions. [2024-11-13 12:44:16,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 107 transitions. [2024-11-13 12:44:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 12:44:16,386 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:16,386 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:16,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-13 12:44:16,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-13 12:44:16,587 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:44:16,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:16,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1912736674, now seen corresponding path program 1 times [2024-11-13 12:44:16,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:44:16,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579873325] [2024-11-13 12:44:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:16,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-13 12:44:16,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/mathsat [2024-11-13 12:44:16,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-13 12:44:16,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-13 12:55:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:35,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 12:55:35,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:55:44,171 WARN L286 SmtUtils]: Spent 8.24s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 12:55:52,319 WARN L286 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 12:56:00,577 WARN L286 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 12:56:04,670 WARN L851 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) |c_ULTIMATE.start_main1_~result~0#1|)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2024-11-13 12:56:21,093 WARN L286 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 12:56:29,303 WARN L286 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 12:56:37,429 WARN L286 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 12:56:49,750 WARN L286 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 12:56:58,012 WARN L286 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 12:57:06,159 WARN L286 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 12:57:10,260 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 34961.0 25000.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from false [2024-11-13 12:57:14,305 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 34961.0 25000.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from true [2024-11-13 12:57:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:14,306 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:57:14,306 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:57:14,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579873325] [2024-11-13 12:57:14,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579873325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:14,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:14,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:57:14,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995850350] [2024-11-13 12:57:14,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:14,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:57:14,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:57:14,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:57:14,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-13 12:57:14,308 INFO L87 Difference]: Start difference. First operand 74 states and 107 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:18,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 12:57:22,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 12:57:26,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 12:57:27,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:27,059 INFO L93 Difference]: Finished difference Result 74 states and 107 transitions. [2024-11-13 12:57:27,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:57:27,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-13 12:57:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:27,062 INFO L225 Difference]: With dead ends: 74 [2024-11-13 12:57:27,062 INFO L226 Difference]: Without dead ends: 69 [2024-11-13 12:57:27,062 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-13 12:57:27,063 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 101 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:27,064 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 274 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 3 Unknown, 214 Unchecked, 12.7s Time] [2024-11-13 12:57:27,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-13 12:57:27,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-13 12:57:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.5) internal successors, (87), 60 states have internal predecessors, (87), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-13 12:57:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2024-11-13 12:57:27,075 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 7 [2024-11-13 12:57:27,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:27,075 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2024-11-13 12:57:27,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:27,076 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2024-11-13 12:57:27,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 12:57:27,077 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:27,077 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:27,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-13 12:57:27,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-13 12:57:27,278 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:57:27,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:27,278 INFO L85 PathProgramCache]: Analyzing trace with hash -549432071, now seen corresponding path program 1 times [2024-11-13 12:57:27,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:57:27,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117319978] [2024-11-13 12:57:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:27,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:27,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:27,283 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:27,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 12:57:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:27,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:57:27,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:57:28,314 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:57:28,863 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:57:28,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117319978] [2024-11-13 12:57:28,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117319978] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:28,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:57:28,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-13 12:57:28,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116313170] [2024-11-13 12:57:28,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:28,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 12:57:28,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:57:28,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 12:57:28,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:57:28,866 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:57:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:30,781 INFO L93 Difference]: Finished difference Result 146 states and 224 transitions. [2024-11-13 12:57:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 12:57:30,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-11-13 12:57:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:30,785 INFO L225 Difference]: With dead ends: 146 [2024-11-13 12:57:30,785 INFO L226 Difference]: Without dead ends: 101 [2024-11-13 12:57:30,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:57:30,787 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 31 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:30,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 597 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 12:57:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-13 12:57:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2024-11-13 12:57:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 87 states have internal predecessors, (123), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-13 12:57:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 148 transitions. [2024-11-13 12:57:30,815 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 148 transitions. Word has length 33 [2024-11-13 12:57:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:30,816 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 148 transitions. [2024-11-13 12:57:30,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:57:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 148 transitions. [2024-11-13 12:57:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-13 12:57:30,820 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:30,820 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:30,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 12:57:31,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:31,021 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:57:31,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1528596169, now seen corresponding path program 1 times [2024-11-13 12:57:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:57:31,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505445361] [2024-11-13 12:57:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:31,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:31,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:31,025 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:31,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 12:57:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:31,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:57:31,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 12:57:32,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:57:33,563 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:57:33,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505445361] [2024-11-13 12:57:33,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505445361] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:33,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:57:33,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2024-11-13 12:57:33,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573694828] [2024-11-13 12:57:33,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:33,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:57:33,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:57:33,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:57:33,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:57:33,565 INFO L87 Difference]: Start difference. First operand 99 states and 148 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 12:57:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:36,731 INFO L93 Difference]: Finished difference Result 231 states and 366 transitions. [2024-11-13 12:57:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:57:36,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2024-11-13 12:57:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:36,734 INFO L225 Difference]: With dead ends: 231 [2024-11-13 12:57:36,734 INFO L226 Difference]: Without dead ends: 165 [2024-11-13 12:57:36,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:57:36,736 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 60 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:36,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1050 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-13 12:57:36,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-13 12:57:36,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 127. [2024-11-13 12:57:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 106 states have (on average 1.3773584905660377) internal successors, (146), 106 states have internal predecessors, (146), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (33), 20 states have call predecessors, (33), 15 states have call successors, (33) [2024-11-13 12:57:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 195 transitions. [2024-11-13 12:57:36,754 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 195 transitions. Word has length 37 [2024-11-13 12:57:36,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:36,754 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 195 transitions. [2024-11-13 12:57:36,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 12:57:36,755 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 195 transitions. [2024-11-13 12:57:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 12:57:36,757 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:36,757 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:36,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 12:57:36,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:36,958 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:57:36,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:36,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1466896535, now seen corresponding path program 1 times [2024-11-13 12:57:36,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:57:36,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3876624] [2024-11-13 12:57:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:36,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:36,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:36,961 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:36,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 12:57:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:37,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 12:57:37,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 12:57:39,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:57:40,587 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:57:40,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3876624] [2024-11-13 12:57:40,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3876624] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:40,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:57:40,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2024-11-13 12:57:40,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676657710] [2024-11-13 12:57:40,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:40,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:57:40,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:57:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:57:40,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:57:40,590 INFO L87 Difference]: Start difference. First operand 127 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:57:42,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:42,905 INFO L93 Difference]: Finished difference Result 257 states and 388 transitions. [2024-11-13 12:57:42,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:57:42,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2024-11-13 12:57:42,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:42,909 INFO L225 Difference]: With dead ends: 257 [2024-11-13 12:57:42,909 INFO L226 Difference]: Without dead ends: 202 [2024-11-13 12:57:42,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:57:42,911 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 39 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:42,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 437 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-13 12:57:42,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-13 12:57:42,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2024-11-13 12:57:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 139 states have (on average 1.3453237410071943) internal successors, (187), 133 states have internal predecessors, (187), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (33), 26 states have call predecessors, (33), 15 states have call successors, (33) [2024-11-13 12:57:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 236 transitions. [2024-11-13 12:57:42,935 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 236 transitions. Word has length 41 [2024-11-13 12:57:42,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:42,936 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 236 transitions. [2024-11-13 12:57:42,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:57:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 236 transitions. [2024-11-13 12:57:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 12:57:42,939 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:42,940 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:42,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 12:57:43,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:43,140 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:57:43,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1409638233, now seen corresponding path program 1 times [2024-11-13 12:57:43,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:57:43,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606863578] [2024-11-13 12:57:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:43,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:43,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:43,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:43,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 12:57:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:43,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 12:57:43,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:57:44,078 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:57:44,078 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:57:44,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606863578] [2024-11-13 12:57:44,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606863578] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:44,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:44,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 12:57:44,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595546510] [2024-11-13 12:57:44,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:44,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:57:44,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:57:44,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:57:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:57:44,081 INFO L87 Difference]: Start difference. First operand 160 states and 236 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:57:45,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:45,442 INFO L93 Difference]: Finished difference Result 259 states and 386 transitions. [2024-11-13 12:57:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:57:45,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2024-11-13 12:57:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:45,445 INFO L225 Difference]: With dead ends: 259 [2024-11-13 12:57:45,445 INFO L226 Difference]: Without dead ends: 198 [2024-11-13 12:57:45,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:57:45,447 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 33 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:45,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 517 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 12:57:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-13 12:57:45,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2024-11-13 12:57:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 171 states have (on average 1.3508771929824561) internal successors, (231), 167 states have internal predecessors, (231), 20 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (37), 30 states have call predecessors, (37), 19 states have call successors, (37) [2024-11-13 12:57:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 288 transitions. [2024-11-13 12:57:45,473 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 288 transitions. Word has length 41 [2024-11-13 12:57:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:45,477 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 288 transitions. [2024-11-13 12:57:45,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:57:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 288 transitions. [2024-11-13 12:57:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 12:57:45,480 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:45,480 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:45,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 12:57:45,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:45,681 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:57:45,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash 728518674, now seen corresponding path program 1 times [2024-11-13 12:57:45,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:57:45,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112747614] [2024-11-13 12:57:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:45,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:45,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:45,685 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:45,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 12:57:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:45,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:57:45,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:57:46,210 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:57:46,211 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:57:46,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112747614] [2024-11-13 12:57:46,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112747614] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:46,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:46,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:57:46,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722239935] [2024-11-13 12:57:46,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:46,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:57:46,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:57:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:57:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:57:46,213 INFO L87 Difference]: Start difference. First operand 196 states and 288 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:57:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:46,409 INFO L93 Difference]: Finished difference Result 317 states and 467 transitions. [2024-11-13 12:57:46,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:57:46,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-13 12:57:46,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:46,413 INFO L225 Difference]: With dead ends: 317 [2024-11-13 12:57:46,413 INFO L226 Difference]: Without dead ends: 251 [2024-11-13 12:57:46,414 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:57:46,415 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 15 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:46,415 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 344 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:57:46,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-13 12:57:46,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2024-11-13 12:57:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 224 states have (on average 1.3214285714285714) internal successors, (296), 220 states have internal predecessors, (296), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (39), 32 states have call predecessors, (39), 21 states have call successors, (39) [2024-11-13 12:57:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 357 transitions. [2024-11-13 12:57:46,449 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 357 transitions. Word has length 44 [2024-11-13 12:57:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:46,453 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 357 transitions. [2024-11-13 12:57:46,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:57:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 357 transitions. [2024-11-13 12:57:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 12:57:46,456 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:46,456 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:46,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 12:57:46,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:46,657 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:57:46,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:46,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1141622334, now seen corresponding path program 1 times [2024-11-13 12:57:46,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:57:46,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463640328] [2024-11-13 12:57:46,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:46,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:46,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:46,661 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:46,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 12:57:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:46,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:57:46,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:57:47,054 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:57:47,054 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:57:47,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463640328] [2024-11-13 12:57:47,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463640328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:47,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:47,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:57:47,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019374002] [2024-11-13 12:57:47,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:47,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:57:47,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:57:47,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:57:47,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:57:47,056 INFO L87 Difference]: Start difference. First operand 251 states and 357 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:57:47,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:47,502 INFO L93 Difference]: Finished difference Result 437 states and 618 transitions. [2024-11-13 12:57:47,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:57:47,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-11-13 12:57:47,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:47,505 INFO L225 Difference]: With dead ends: 437 [2024-11-13 12:57:47,505 INFO L226 Difference]: Without dead ends: 190 [2024-11-13 12:57:47,506 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:57:47,507 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 26 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:47,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 261 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:57:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-13 12:57:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 178. [2024-11-13 12:57:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 158 states have (on average 1.2848101265822784) internal successors, (203), 159 states have internal predecessors, (203), 14 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (25), 18 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-13 12:57:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 242 transitions. [2024-11-13 12:57:47,526 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 242 transitions. Word has length 44 [2024-11-13 12:57:47,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:47,526 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 242 transitions. [2024-11-13 12:57:47,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:57:47,526 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 242 transitions. [2024-11-13 12:57:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 12:57:47,528 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:47,528 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:47,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 12:57:47,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:47,729 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:57:47,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:47,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1015579738, now seen corresponding path program 1 times [2024-11-13 12:57:47,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:57:47,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961781541] [2024-11-13 12:57:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:47,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:47,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:47,732 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:47,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 12:57:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:47,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:57:47,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:57:47,994 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:57:47,994 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:57:47,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961781541] [2024-11-13 12:57:47,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961781541] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:47,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:47,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:57:47,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943853917] [2024-11-13 12:57:47,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:47,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:57:47,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:57:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:57:47,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:57:47,996 INFO L87 Difference]: Start difference. First operand 178 states and 242 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:57:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:48,161 INFO L93 Difference]: Finished difference Result 189 states and 254 transitions. [2024-11-13 12:57:48,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:57:48,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-13 12:57:48,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:48,164 INFO L225 Difference]: With dead ends: 189 [2024-11-13 12:57:48,164 INFO L226 Difference]: Without dead ends: 182 [2024-11-13 12:57:48,164 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:57:48,165 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:48,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 288 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:57:48,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-13 12:57:48,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2024-11-13 12:57:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 162 states have (on average 1.2777777777777777) internal successors, (207), 163 states have internal predecessors, (207), 14 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (25), 18 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-13 12:57:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 246 transitions. [2024-11-13 12:57:48,181 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 246 transitions. Word has length 45 [2024-11-13 12:57:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:48,182 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 246 transitions. [2024-11-13 12:57:48,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:57:48,182 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 246 transitions. [2024-11-13 12:57:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 12:57:48,184 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:48,184 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:48,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 12:57:48,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:48,387 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:57:48,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:48,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1504380196, now seen corresponding path program 1 times [2024-11-13 12:57:48,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:57:48,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134152487] [2024-11-13 12:57:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:48,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:48,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:48,390 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:48,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 12:57:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:48,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 12:57:48,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:57:48,782 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:57:48,782 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:57:48,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134152487] [2024-11-13 12:57:48,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134152487] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:48,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:48,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:57:48,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515840716] [2024-11-13 12:57:48,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:48,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:57:48,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:57:48,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:57:48,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:57:48,784 INFO L87 Difference]: Start difference. First operand 182 states and 246 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:57:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:49,131 INFO L93 Difference]: Finished difference Result 189 states and 252 transitions. [2024-11-13 12:57:49,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:57:49,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-13 12:57:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:49,133 INFO L225 Difference]: With dead ends: 189 [2024-11-13 12:57:49,134 INFO L226 Difference]: Without dead ends: 182 [2024-11-13 12:57:49,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:57:49,135 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 3 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:49,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 383 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:57:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-13 12:57:49,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2024-11-13 12:57:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 158 states have (on average 1.2658227848101267) internal successors, (200), 159 states have internal predecessors, (200), 14 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (25), 18 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-13 12:57:49,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 239 transitions. [2024-11-13 12:57:49,151 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 239 transitions. Word has length 45 [2024-11-13 12:57:49,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:49,151 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 239 transitions. [2024-11-13 12:57:49,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:57:49,152 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 239 transitions. [2024-11-13 12:57:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 12:57:49,153 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:49,153 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:49,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 12:57:49,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:49,357 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:57:49,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:49,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2051114471, now seen corresponding path program 2 times [2024-11-13 12:57:49,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:57:49,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757154403] [2024-11-13 12:57:49,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:57:49,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:49,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:49,360 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:49,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 12:57:49,439 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 12:57:49,440 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:49,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 12:57:49,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:57:51,159 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:57:51,159 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:57:51,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757154403] [2024-11-13 12:57:51,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757154403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:51,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:51,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 12:57:51,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699944122] [2024-11-13 12:57:51,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:51,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 12:57:51,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:57:51,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 12:57:51,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:57:51,161 INFO L87 Difference]: Start difference. First operand 178 states and 239 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:57:54,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:54,792 INFO L93 Difference]: Finished difference Result 304 states and 411 transitions. [2024-11-13 12:57:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:57:54,793 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-13 12:57:54,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:54,796 INFO L225 Difference]: With dead ends: 304 [2024-11-13 12:57:54,796 INFO L226 Difference]: Without dead ends: 265 [2024-11-13 12:57:54,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:57:54,797 INFO L432 NwaCegarLoop]: 126 mSDtfsCounter, 57 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:54,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1184 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-13 12:57:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-11-13 12:57:54,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 261. [2024-11-13 12:57:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 234 states have (on average 1.2777777777777777) internal successors, (299), 233 states have internal predecessors, (299), 20 states have call successors, (20), 3 states have call predecessors, (20), 6 states have return successors, (31), 27 states have call predecessors, (31), 19 states have call successors, (31) [2024-11-13 12:57:54,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 350 transitions. [2024-11-13 12:57:54,819 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 350 transitions. Word has length 45 [2024-11-13 12:57:54,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:54,819 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 350 transitions. [2024-11-13 12:57:54,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:57:54,820 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 350 transitions. [2024-11-13 12:57:54,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 12:57:54,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:54,821 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:54,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 12:57:55,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:55,022 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:57:55,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:55,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1132557739, now seen corresponding path program 1 times [2024-11-13 12:57:55,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:57:55,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44672727] [2024-11-13 12:57:55,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:55,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:55,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:55,025 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:55,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 12:57:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:55,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 12:57:55,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:57:55,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:57:56,555 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:57:56,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44672727] [2024-11-13 12:57:56,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44672727] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:56,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:57:56,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2024-11-13 12:57:56,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860818650] [2024-11-13 12:57:56,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:56,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:57:56,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:57:56,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:57:56,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:57:56,557 INFO L87 Difference]: Start difference. First operand 261 states and 350 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:57:57,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:57,976 INFO L93 Difference]: Finished difference Result 438 states and 613 transitions. [2024-11-13 12:57:57,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:57:57,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-11-13 12:57:57,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:57,979 INFO L225 Difference]: With dead ends: 438 [2024-11-13 12:57:57,980 INFO L226 Difference]: Without dead ends: 352 [2024-11-13 12:57:57,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:57:57,981 INFO L432 NwaCegarLoop]: 130 mSDtfsCounter, 46 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:57,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 721 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 12:57:57,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-11-13 12:57:58,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2024-11-13 12:57:58,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 311 states have (on average 1.2990353697749195) internal successors, (404), 313 states have internal predecessors, (404), 30 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-13 12:57:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 475 transitions. [2024-11-13 12:57:58,014 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 475 transitions. Word has length 45 [2024-11-13 12:57:58,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:58,014 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 475 transitions. [2024-11-13 12:57:58,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:57:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 475 transitions. [2024-11-13 12:57:58,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 12:57:58,016 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:58,016 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:58,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-13 12:57:58,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:58,217 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:57:58,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:58,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1075299437, now seen corresponding path program 1 times [2024-11-13 12:57:58,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:57:58,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608897677] [2024-11-13 12:57:58,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:58,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:58,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:58,221 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:58,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 12:57:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:58,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 12:57:58,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:58:00,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:02,518 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:02,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608897677] [2024-11-13 12:58:02,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608897677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:02,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [528255868] [2024-11-13 12:58:02,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:02,518 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 12:58:02,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 12:58:02,530 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 12:58:02,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-13 12:58:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:02,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 12:58:02,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:58:03,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:03,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [528255868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:03,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:58:03,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-13 12:58:03,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892129282] [2024-11-13 12:58:03,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:03,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 12:58:03,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:03,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 12:58:03,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:58:03,890 INFO L87 Difference]: Start difference. First operand 348 states and 475 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:58:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:06,412 INFO L93 Difference]: Finished difference Result 362 states and 487 transitions. [2024-11-13 12:58:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 12:58:06,413 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-11-13 12:58:06,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:06,415 INFO L225 Difference]: With dead ends: 362 [2024-11-13 12:58:06,415 INFO L226 Difference]: Without dead ends: 360 [2024-11-13 12:58:06,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:58:06,417 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 48 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:06,417 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 920 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-13 12:58:06,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2024-11-13 12:58:06,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 356. [2024-11-13 12:58:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 317 states have (on average 1.2933753943217665) internal successors, (410), 319 states have internal predecessors, (410), 30 states have call successors, (30), 5 states have call predecessors, (30), 8 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-13 12:58:06,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 481 transitions. [2024-11-13 12:58:06,438 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 481 transitions. Word has length 45 [2024-11-13 12:58:06,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:06,439 INFO L471 AbstractCegarLoop]: Abstraction has 356 states and 481 transitions. [2024-11-13 12:58:06,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:58:06,439 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 481 transitions. [2024-11-13 12:58:06,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 12:58:06,440 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:06,441 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:06,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-13 12:58:06,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2024-11-13 12:58:06,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt [2024-11-13 12:58:06,843 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:06,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:06,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1246282599, now seen corresponding path program 1 times [2024-11-13 12:58:06,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:06,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604720742] [2024-11-13 12:58:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:06,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:06,846 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:06,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 12:58:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:06,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:58:06,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:58:07,700 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:07,700 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:07,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604720742] [2024-11-13 12:58:07,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604720742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:07,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:07,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:58:07,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372325780] [2024-11-13 12:58:07,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:07,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:58:07,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:07,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:58:07,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:58:07,702 INFO L87 Difference]: Start difference. First operand 356 states and 481 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:08,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:08,559 INFO L93 Difference]: Finished difference Result 377 states and 506 transitions. [2024-11-13 12:58:08,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:58:08,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-13 12:58:08,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:08,562 INFO L225 Difference]: With dead ends: 377 [2024-11-13 12:58:08,562 INFO L226 Difference]: Without dead ends: 375 [2024-11-13 12:58:08,562 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:58:08,563 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 3 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:08,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 475 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 12:58:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-13 12:58:08,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2024-11-13 12:58:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 322 states have (on average 1.295031055900621) internal successors, (417), 326 states have internal predecessors, (417), 32 states have call successors, (32), 6 states have call predecessors, (32), 9 states have return successors, (43), 37 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-13 12:58:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 492 transitions. [2024-11-13 12:58:08,585 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 492 transitions. Word has length 45 [2024-11-13 12:58:08,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:08,585 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 492 transitions. [2024-11-13 12:58:08,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 492 transitions. [2024-11-13 12:58:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 12:58:08,587 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:08,587 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:08,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-13 12:58:08,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:08,787 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:08,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:08,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1189024297, now seen corresponding path program 1 times [2024-11-13 12:58:08,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:08,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101485804] [2024-11-13 12:58:08,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:08,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:08,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:08,790 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:08,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 12:58:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:08,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 12:58:08,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:58:09,443 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:09,443 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:09,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101485804] [2024-11-13 12:58:09,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101485804] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:09,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:09,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:58:09,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308239536] [2024-11-13 12:58:09,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:09,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:58:09,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:09,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:58:09,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:58:09,445 INFO L87 Difference]: Start difference. First operand 364 states and 492 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:10,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:10,366 INFO L93 Difference]: Finished difference Result 370 states and 497 transitions. [2024-11-13 12:58:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:58:10,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-13 12:58:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:10,368 INFO L225 Difference]: With dead ends: 370 [2024-11-13 12:58:10,369 INFO L226 Difference]: Without dead ends: 368 [2024-11-13 12:58:10,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:58:10,369 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:10,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 455 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 12:58:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-11-13 12:58:10,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 360. [2024-11-13 12:58:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 320 states have (on average 1.290625) internal successors, (413), 322 states have internal predecessors, (413), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-13 12:58:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 484 transitions. [2024-11-13 12:58:10,404 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 484 transitions. Word has length 45 [2024-11-13 12:58:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:10,405 INFO L471 AbstractCegarLoop]: Abstraction has 360 states and 484 transitions. [2024-11-13 12:58:10,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:10,405 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 484 transitions. [2024-11-13 12:58:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 12:58:10,406 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:10,407 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:10,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 12:58:10,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:10,607 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:10,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:10,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1891124004, now seen corresponding path program 1 times [2024-11-13 12:58:10,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:10,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079294738] [2024-11-13 12:58:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:10,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:10,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:10,611 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:10,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 12:58:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:10,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:58:10,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:58:10,929 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:10,929 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:10,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079294738] [2024-11-13 12:58:10,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079294738] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:10,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:10,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:58:10,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078097977] [2024-11-13 12:58:10,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:10,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:58:10,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:10,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:58:10,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:58:10,930 INFO L87 Difference]: Start difference. First operand 360 states and 484 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:11,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:11,100 INFO L93 Difference]: Finished difference Result 592 states and 817 transitions. [2024-11-13 12:58:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:58:11,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2024-11-13 12:58:11,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:11,103 INFO L225 Difference]: With dead ends: 592 [2024-11-13 12:58:11,103 INFO L226 Difference]: Without dead ends: 500 [2024-11-13 12:58:11,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:58:11,104 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 28 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:11,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 289 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:58:11,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2024-11-13 12:58:11,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 413. [2024-11-13 12:58:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 369 states have (on average 1.2899728997289972) internal successors, (476), 369 states have internal predecessors, (476), 34 states have call successors, (34), 6 states have call predecessors, (34), 9 states have return successors, (45), 41 states have call predecessors, (45), 33 states have call successors, (45) [2024-11-13 12:58:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 555 transitions. [2024-11-13 12:58:11,134 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 555 transitions. Word has length 46 [2024-11-13 12:58:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:11,134 INFO L471 AbstractCegarLoop]: Abstraction has 413 states and 555 transitions. [2024-11-13 12:58:11,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 555 transitions. [2024-11-13 12:58:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 12:58:11,136 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:11,136 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:11,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 12:58:11,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:11,341 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:11,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:11,341 INFO L85 PathProgramCache]: Analyzing trace with hash 807338949, now seen corresponding path program 1 times [2024-11-13 12:58:11,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:11,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953950840] [2024-11-13 12:58:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:11,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:11,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:11,345 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:11,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 12:58:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:11,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 12:58:11,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:58:12,928 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:58:13,946 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:13,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953950840] [2024-11-13 12:58:13,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953950840] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:13,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:58:13,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-13 12:58:13,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109948122] [2024-11-13 12:58:13,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:13,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:58:13,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:13,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:58:13,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:58:13,947 INFO L87 Difference]: Start difference. First operand 413 states and 555 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:15,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:15,551 INFO L93 Difference]: Finished difference Result 604 states and 829 transitions. [2024-11-13 12:58:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:58:15,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-13 12:58:15,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:15,555 INFO L225 Difference]: With dead ends: 604 [2024-11-13 12:58:15,555 INFO L226 Difference]: Without dead ends: 564 [2024-11-13 12:58:15,556 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:58:15,556 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 23 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:15,557 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 374 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-13 12:58:15,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2024-11-13 12:58:15,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 445. [2024-11-13 12:58:15,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 395 states have (on average 1.2835443037974683) internal successors, (507), 395 states have internal predecessors, (507), 40 states have call successors, (40), 6 states have call predecessors, (40), 9 states have return successors, (51), 47 states have call predecessors, (51), 39 states have call successors, (51) [2024-11-13 12:58:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 598 transitions. [2024-11-13 12:58:15,589 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 598 transitions. Word has length 49 [2024-11-13 12:58:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:15,589 INFO L471 AbstractCegarLoop]: Abstraction has 445 states and 598 transitions. [2024-11-13 12:58:15,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 598 transitions. [2024-11-13 12:58:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 12:58:15,591 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:15,591 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:15,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-13 12:58:15,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:15,795 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:15,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:15,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1508403527, now seen corresponding path program 1 times [2024-11-13 12:58:15,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:15,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312269330] [2024-11-13 12:58:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:15,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:15,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:15,799 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:15,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 12:58:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:15,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:58:15,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:58:16,036 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:16,036 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:16,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312269330] [2024-11-13 12:58:16,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312269330] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:16,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:16,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:58:16,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206795414] [2024-11-13 12:58:16,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:16,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:58:16,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:16,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:58:16,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:58:16,037 INFO L87 Difference]: Start difference. First operand 445 states and 598 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:16,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:16,159 INFO L93 Difference]: Finished difference Result 464 states and 619 transitions. [2024-11-13 12:58:16,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:58:16,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-13 12:58:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:16,161 INFO L225 Difference]: With dead ends: 464 [2024-11-13 12:58:16,161 INFO L226 Difference]: Without dead ends: 420 [2024-11-13 12:58:16,162 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:58:16,162 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:16,162 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:58:16,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2024-11-13 12:58:16,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2024-11-13 12:58:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 370 states have (on average 1.2864864864864864) internal successors, (476), 371 states have internal predecessors, (476), 40 states have call successors, (40), 6 states have call predecessors, (40), 9 states have return successors, (49), 46 states have call predecessors, (49), 39 states have call successors, (49) [2024-11-13 12:58:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 565 transitions. [2024-11-13 12:58:16,203 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 565 transitions. Word has length 49 [2024-11-13 12:58:16,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:16,203 INFO L471 AbstractCegarLoop]: Abstraction has 420 states and 565 transitions. [2024-11-13 12:58:16,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 565 transitions. [2024-11-13 12:58:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 12:58:16,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:16,205 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:16,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 12:58:16,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:16,409 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:16,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:16,410 INFO L85 PathProgramCache]: Analyzing trace with hash -2134474190, now seen corresponding path program 1 times [2024-11-13 12:58:16,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:16,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942822475] [2024-11-13 12:58:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:16,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:16,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:16,412 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:16,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 12:58:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:16,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 12:58:16,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 12:58:16,696 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:16,696 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:16,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942822475] [2024-11-13 12:58:16,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942822475] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:16,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:16,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:58:16,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056580432] [2024-11-13 12:58:16,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:16,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:58:16,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:16,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:58:16,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:58:16,698 INFO L87 Difference]: Start difference. First operand 420 states and 565 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:17,149 INFO L93 Difference]: Finished difference Result 545 states and 727 transitions. [2024-11-13 12:58:17,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:58:17,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-13 12:58:17,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:17,153 INFO L225 Difference]: With dead ends: 545 [2024-11-13 12:58:17,153 INFO L226 Difference]: Without dead ends: 514 [2024-11-13 12:58:17,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:58:17,154 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 41 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:17,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 253 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:58:17,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2024-11-13 12:58:17,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 424. [2024-11-13 12:58:17,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 374 states have (on average 1.2807486631016043) internal successors, (479), 375 states have internal predecessors, (479), 40 states have call successors, (40), 6 states have call predecessors, (40), 9 states have return successors, (49), 46 states have call predecessors, (49), 39 states have call successors, (49) [2024-11-13 12:58:17,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 568 transitions. [2024-11-13 12:58:17,186 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 568 transitions. Word has length 50 [2024-11-13 12:58:17,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:17,186 INFO L471 AbstractCegarLoop]: Abstraction has 424 states and 568 transitions. [2024-11-13 12:58:17,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:17,186 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 568 transitions. [2024-11-13 12:58:17,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 12:58:17,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:17,188 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:17,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 12:58:17,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:17,392 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:17,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:17,393 INFO L85 PathProgramCache]: Analyzing trace with hash -566198360, now seen corresponding path program 1 times [2024-11-13 12:58:17,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:17,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466984395] [2024-11-13 12:58:17,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:17,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:17,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:17,395 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:17,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 12:58:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:17,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 12:58:17,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:58:19,167 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:19,167 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:19,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466984395] [2024-11-13 12:58:19,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466984395] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:19,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:19,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 12:58:19,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637146831] [2024-11-13 12:58:19,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:19,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 12:58:19,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:19,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 12:58:19,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:58:19,169 INFO L87 Difference]: Start difference. First operand 424 states and 568 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:23,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:23,178 INFO L93 Difference]: Finished difference Result 475 states and 636 transitions. [2024-11-13 12:58:23,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:58:23,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-13 12:58:23,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:23,180 INFO L225 Difference]: With dead ends: 475 [2024-11-13 12:58:23,180 INFO L226 Difference]: Without dead ends: 448 [2024-11-13 12:58:23,181 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:58:23,182 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 72 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:23,182 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 823 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-13 12:58:23,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2024-11-13 12:58:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 442. [2024-11-13 12:58:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 390 states have (on average 1.2794871794871794) internal successors, (499), 392 states have internal predecessors, (499), 42 states have call successors, (42), 6 states have call predecessors, (42), 9 states have return successors, (51), 48 states have call predecessors, (51), 41 states have call successors, (51) [2024-11-13 12:58:23,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 592 transitions. [2024-11-13 12:58:23,229 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 592 transitions. Word has length 50 [2024-11-13 12:58:23,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:23,229 INFO L471 AbstractCegarLoop]: Abstraction has 442 states and 592 transitions. [2024-11-13 12:58:23,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 592 transitions. [2024-11-13 12:58:23,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 12:58:23,231 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:23,232 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:23,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 12:58:23,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:23,433 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:23,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:23,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1821559572, now seen corresponding path program 1 times [2024-11-13 12:58:23,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:23,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442328318] [2024-11-13 12:58:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:23,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:23,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:23,438 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:23,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 12:58:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:23,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 12:58:23,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:58:23,858 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:23,858 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:23,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442328318] [2024-11-13 12:58:23,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442328318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:23,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:23,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:58:23,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722753864] [2024-11-13 12:58:23,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:23,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:58:23,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:58:23,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:58:23,860 INFO L87 Difference]: Start difference. First operand 442 states and 592 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:24,663 INFO L93 Difference]: Finished difference Result 525 states and 701 transitions. [2024-11-13 12:58:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:58:24,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-13 12:58:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:24,667 INFO L225 Difference]: With dead ends: 525 [2024-11-13 12:58:24,667 INFO L226 Difference]: Without dead ends: 459 [2024-11-13 12:58:24,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:58:24,668 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 61 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:24,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 368 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 12:58:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2024-11-13 12:58:24,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 424. [2024-11-13 12:58:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 374 states have (on average 1.2700534759358288) internal successors, (475), 375 states have internal predecessors, (475), 40 states have call successors, (40), 6 states have call predecessors, (40), 9 states have return successors, (49), 46 states have call predecessors, (49), 39 states have call successors, (49) [2024-11-13 12:58:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 564 transitions. [2024-11-13 12:58:24,715 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 564 transitions. Word has length 50 [2024-11-13 12:58:24,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:24,715 INFO L471 AbstractCegarLoop]: Abstraction has 424 states and 564 transitions. [2024-11-13 12:58:24,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:24,716 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 564 transitions. [2024-11-13 12:58:24,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 12:58:24,717 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:24,717 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:24,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 12:58:24,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:24,918 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:24,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:24,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1251141765, now seen corresponding path program 1 times [2024-11-13 12:58:24,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:24,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771021436] [2024-11-13 12:58:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:24,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:24,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:24,922 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:24,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 12:58:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:24,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 12:58:24,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:58:26,790 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:26,790 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:26,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771021436] [2024-11-13 12:58:26,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771021436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:26,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:26,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 12:58:26,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989242895] [2024-11-13 12:58:26,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:26,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 12:58:26,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:26,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 12:58:26,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:58:26,792 INFO L87 Difference]: Start difference. First operand 424 states and 564 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:30,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:30,598 INFO L93 Difference]: Finished difference Result 502 states and 668 transitions. [2024-11-13 12:58:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 12:58:30,599 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2024-11-13 12:58:30,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:30,602 INFO L225 Difference]: With dead ends: 502 [2024-11-13 12:58:30,602 INFO L226 Difference]: Without dead ends: 463 [2024-11-13 12:58:30,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:58:30,604 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 48 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:30,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 786 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-13 12:58:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2024-11-13 12:58:30,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 450. [2024-11-13 12:58:30,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 396 states have (on average 1.2575757575757576) internal successors, (498), 399 states have internal predecessors, (498), 44 states have call successors, (44), 6 states have call predecessors, (44), 9 states have return successors, (52), 49 states have call predecessors, (52), 42 states have call successors, (52) [2024-11-13 12:58:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 594 transitions. [2024-11-13 12:58:30,646 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 594 transitions. Word has length 51 [2024-11-13 12:58:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:30,646 INFO L471 AbstractCegarLoop]: Abstraction has 450 states and 594 transitions. [2024-11-13 12:58:30,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:30,647 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 594 transitions. [2024-11-13 12:58:30,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 12:58:30,648 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:30,649 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:30,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 12:58:30,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:30,853 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:30,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:30,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1393357641, now seen corresponding path program 1 times [2024-11-13 12:58:30,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:30,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638682340] [2024-11-13 12:58:30,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:30,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:30,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:30,857 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:30,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 12:58:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:30,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 12:58:30,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:58:31,711 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:31,712 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:31,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638682340] [2024-11-13 12:58:31,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638682340] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:31,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:31,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 12:58:31,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663939990] [2024-11-13 12:58:31,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:31,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:58:31,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:31,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:58:31,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:58:31,713 INFO L87 Difference]: Start difference. First operand 450 states and 594 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:33,942 INFO L93 Difference]: Finished difference Result 587 states and 781 transitions. [2024-11-13 12:58:33,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:58:33,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2024-11-13 12:58:33,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:33,945 INFO L225 Difference]: With dead ends: 587 [2024-11-13 12:58:33,945 INFO L226 Difference]: Without dead ends: 563 [2024-11-13 12:58:33,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:58:33,946 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 27 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:33,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 535 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-13 12:58:33,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2024-11-13 12:58:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 467. [2024-11-13 12:58:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 409 states have (on average 1.2665036674816625) internal successors, (518), 414 states have internal predecessors, (518), 48 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (56), 52 states have call predecessors, (56), 46 states have call successors, (56) [2024-11-13 12:58:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 622 transitions. [2024-11-13 12:58:33,989 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 622 transitions. Word has length 51 [2024-11-13 12:58:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:33,989 INFO L471 AbstractCegarLoop]: Abstraction has 467 states and 622 transitions. [2024-11-13 12:58:33,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:33,990 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 622 transitions. [2024-11-13 12:58:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 12:58:33,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:33,992 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:34,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-13 12:58:34,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:34,192 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:34,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:34,193 INFO L85 PathProgramCache]: Analyzing trace with hash -609523299, now seen corresponding path program 1 times [2024-11-13 12:58:34,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:34,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508669563] [2024-11-13 12:58:34,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:34,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:34,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:34,196 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:34,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 12:58:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:34,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:58:34,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:58:34,631 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:34,631 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:34,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508669563] [2024-11-13 12:58:34,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508669563] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:34,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:34,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:58:34,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50554676] [2024-11-13 12:58:34,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:34,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:58:34,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:34,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:58:34,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:58:34,633 INFO L87 Difference]: Start difference. First operand 467 states and 622 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:34,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:34,815 INFO L93 Difference]: Finished difference Result 514 states and 681 transitions. [2024-11-13 12:58:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:58:34,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2024-11-13 12:58:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:34,818 INFO L225 Difference]: With dead ends: 514 [2024-11-13 12:58:34,818 INFO L226 Difference]: Without dead ends: 467 [2024-11-13 12:58:34,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:58:34,819 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:34,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 281 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:58:34,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2024-11-13 12:58:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2024-11-13 12:58:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 409 states have (on average 1.215158924205379) internal successors, (497), 414 states have internal predecessors, (497), 48 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (56), 52 states have call predecessors, (56), 46 states have call successors, (56) [2024-11-13 12:58:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 601 transitions. [2024-11-13 12:58:34,872 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 601 transitions. Word has length 51 [2024-11-13 12:58:34,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:34,872 INFO L471 AbstractCegarLoop]: Abstraction has 467 states and 601 transitions. [2024-11-13 12:58:34,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 601 transitions. [2024-11-13 12:58:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 12:58:34,874 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:34,874 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:34,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 12:58:35,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:35,075 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:35,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:35,076 INFO L85 PathProgramCache]: Analyzing trace with hash 977915423, now seen corresponding path program 1 times [2024-11-13 12:58:35,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:35,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091934652] [2024-11-13 12:58:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:35,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:35,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:35,078 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:35,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 12:58:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:35,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 12:58:35,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:58:36,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:58:36,990 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:36,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091934652] [2024-11-13 12:58:36,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091934652] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:36,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:58:36,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2024-11-13 12:58:36,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816626423] [2024-11-13 12:58:36,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:36,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:58:36,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:36,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:58:36,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:58:36,993 INFO L87 Difference]: Start difference. First operand 467 states and 601 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:58:37,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:37,936 INFO L93 Difference]: Finished difference Result 495 states and 634 transitions. [2024-11-13 12:58:37,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:58:37,937 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-11-13 12:58:37,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:37,939 INFO L225 Difference]: With dead ends: 495 [2024-11-13 12:58:37,939 INFO L226 Difference]: Without dead ends: 459 [2024-11-13 12:58:37,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:58:37,941 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 20 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:37,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 581 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 12:58:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2024-11-13 12:58:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 443. [2024-11-13 12:58:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 385 states have (on average 1.2181818181818183) internal successors, (469), 391 states have internal predecessors, (469), 48 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (56), 51 states have call predecessors, (56), 46 states have call successors, (56) [2024-11-13 12:58:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 573 transitions. [2024-11-13 12:58:38,000 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 573 transitions. Word has length 51 [2024-11-13 12:58:38,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:38,002 INFO L471 AbstractCegarLoop]: Abstraction has 443 states and 573 transitions. [2024-11-13 12:58:38,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:58:38,002 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 573 transitions. [2024-11-13 12:58:38,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 12:58:38,007 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:38,008 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:38,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-13 12:58:38,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:38,208 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:38,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:38,209 INFO L85 PathProgramCache]: Analyzing trace with hash -317311561, now seen corresponding path program 1 times [2024-11-13 12:58:38,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:38,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024693473] [2024-11-13 12:58:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:38,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:38,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:38,213 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:38,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 12:58:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:38,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:58:38,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:58:38,450 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:38,450 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:38,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024693473] [2024-11-13 12:58:38,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024693473] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:38,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:38,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:58:38,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525259671] [2024-11-13 12:58:38,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:38,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:58:38,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:38,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:58:38,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:58:38,454 INFO L87 Difference]: Start difference. First operand 443 states and 573 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:38,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:38,608 INFO L93 Difference]: Finished difference Result 452 states and 581 transitions. [2024-11-13 12:58:38,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:58:38,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2024-11-13 12:58:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:38,614 INFO L225 Difference]: With dead ends: 452 [2024-11-13 12:58:38,614 INFO L226 Difference]: Without dead ends: 405 [2024-11-13 12:58:38,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:58:38,615 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 0 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:38,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 282 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:58:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-11-13 12:58:38,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 368. [2024-11-13 12:58:38,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 320 states have (on average 1.215625) internal successors, (389), 325 states have internal predecessors, (389), 38 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (43), 40 states have call predecessors, (43), 36 states have call successors, (43) [2024-11-13 12:58:38,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 470 transitions. [2024-11-13 12:58:38,653 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 470 transitions. Word has length 53 [2024-11-13 12:58:38,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:38,653 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 470 transitions. [2024-11-13 12:58:38,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:38,654 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 470 transitions. [2024-11-13 12:58:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 12:58:38,655 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:38,655 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:38,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-13 12:58:38,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:38,856 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:38,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:38,856 INFO L85 PathProgramCache]: Analyzing trace with hash 685169853, now seen corresponding path program 1 times [2024-11-13 12:58:38,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:38,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366411421] [2024-11-13 12:58:38,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:38,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:38,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:38,859 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:38,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 12:58:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:38,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 12:58:38,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:58:40,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:58:41,961 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:41,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366411421] [2024-11-13 12:58:41,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366411421] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:41,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:58:41,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-13 12:58:41,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347657199] [2024-11-13 12:58:41,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:41,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:58:41,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:41,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:58:41,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:58:41,962 INFO L87 Difference]: Start difference. First operand 368 states and 470 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:43,764 INFO L93 Difference]: Finished difference Result 449 states and 569 transitions. [2024-11-13 12:58:43,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:58:43,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2024-11-13 12:58:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:43,767 INFO L225 Difference]: With dead ends: 449 [2024-11-13 12:58:43,767 INFO L226 Difference]: Without dead ends: 388 [2024-11-13 12:58:43,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:58:43,768 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 24 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:43,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 373 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 12:58:43,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2024-11-13 12:58:43,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 358. [2024-11-13 12:58:43,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 310 states have (on average 1.2129032258064516) internal successors, (376), 314 states have internal predecessors, (376), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-13 12:58:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 455 transitions. [2024-11-13 12:58:43,808 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 455 transitions. Word has length 53 [2024-11-13 12:58:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:43,809 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 455 transitions. [2024-11-13 12:58:43,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:58:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 455 transitions. [2024-11-13 12:58:43,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 12:58:43,811 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:43,811 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:43,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 12:58:44,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:44,012 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:44,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:44,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1804015042, now seen corresponding path program 1 times [2024-11-13 12:58:44,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:44,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175691873] [2024-11-13 12:58:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:44,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:44,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:44,015 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:44,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 12:58:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:44,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 12:58:44,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:58:46,825 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:46,825 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:46,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175691873] [2024-11-13 12:58:46,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175691873] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:46,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:46,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-13 12:58:46,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450538539] [2024-11-13 12:58:46,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:46,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 12:58:46,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:46,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 12:58:46,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:58:46,827 INFO L87 Difference]: Start difference. First operand 358 states and 455 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 12:58:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:52,190 INFO L93 Difference]: Finished difference Result 444 states and 563 transitions. [2024-11-13 12:58:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 12:58:52,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 55 [2024-11-13 12:58:52,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:52,193 INFO L225 Difference]: With dead ends: 444 [2024-11-13 12:58:52,193 INFO L226 Difference]: Without dead ends: 399 [2024-11-13 12:58:52,194 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:58:52,195 INFO L432 NwaCegarLoop]: 127 mSDtfsCounter, 91 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:52,197 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1282 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-13 12:58:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-11-13 12:58:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 358. [2024-11-13 12:58:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 310 states have (on average 1.2032258064516128) internal successors, (373), 314 states have internal predecessors, (373), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-13 12:58:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 452 transitions. [2024-11-13 12:58:52,246 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 452 transitions. Word has length 55 [2024-11-13 12:58:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:52,246 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 452 transitions. [2024-11-13 12:58:52,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 12:58:52,247 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 452 transitions. [2024-11-13 12:58:52,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 12:58:52,248 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:52,248 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:52,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-13 12:58:52,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:52,449 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:58:52,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:52,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1661799166, now seen corresponding path program 1 times [2024-11-13 12:58:52,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:52,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398847841] [2024-11-13 12:58:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:52,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:52,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:52,452 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:52,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 12:58:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:52,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 12:58:52,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:58:54,299 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:55,519 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:55,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398847841] [2024-11-13 12:58:55,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398847841] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:55,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [22699382] [2024-11-13 12:58:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:55,520 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 12:58:55,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 12:58:55,522 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 12:58:55,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2024-11-13 12:58:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:55,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 12:58:55,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:58:56,630 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:56,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [22699382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:56,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:58:56,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-13 12:58:56,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332886301] [2024-11-13 12:58:56,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:56,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 12:58:56,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:56,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 12:58:56,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:58:56,965 INFO L87 Difference]: Start difference. First operand 358 states and 452 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 12:58:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:59,645 INFO L93 Difference]: Finished difference Result 439 states and 557 transitions. [2024-11-13 12:58:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 12:58:59,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 55 [2024-11-13 12:58:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:59,648 INFO L225 Difference]: With dead ends: 439 [2024-11-13 12:58:59,648 INFO L226 Difference]: Without dead ends: 399 [2024-11-13 12:58:59,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:58:59,649 INFO L432 NwaCegarLoop]: 126 mSDtfsCounter, 45 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:59,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 921 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 12:58:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-11-13 12:58:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 358. [2024-11-13 12:58:59,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 310 states have (on average 1.196774193548387) internal successors, (371), 314 states have internal predecessors, (371), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-13 12:58:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 450 transitions. [2024-11-13 12:58:59,691 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 450 transitions. Word has length 55 [2024-11-13 12:58:59,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:59,692 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 450 transitions. [2024-11-13 12:58:59,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 12:58:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 450 transitions. [2024-11-13 12:58:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 12:58:59,694 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:59,694 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:59,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2024-11-13 12:58:59,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-13 12:59:00,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:00,095 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:59:00,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:00,095 INFO L85 PathProgramCache]: Analyzing trace with hash 212141896, now seen corresponding path program 1 times [2024-11-13 12:59:00,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:59:00,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888233867] [2024-11-13 12:59:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:00,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:00,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:00,099 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:00,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-13 12:59:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:00,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 12:59:00,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:59:02,041 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:59:02,041 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:59:02,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888233867] [2024-11-13 12:59:02,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888233867] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:59:02,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:59:02,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 12:59:02,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575857964] [2024-11-13 12:59:02,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:59:02,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 12:59:02,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:59:02,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 12:59:02,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:59:02,043 INFO L87 Difference]: Start difference. First operand 358 states and 450 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:59:05,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:59:05,279 INFO L93 Difference]: Finished difference Result 430 states and 538 transitions. [2024-11-13 12:59:05,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:59:05,279 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-11-13 12:59:05,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:59:05,281 INFO L225 Difference]: With dead ends: 430 [2024-11-13 12:59:05,281 INFO L226 Difference]: Without dead ends: 376 [2024-11-13 12:59:05,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:59:05,282 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 55 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:59:05,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 844 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-13 12:59:05,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2024-11-13 12:59:05,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 358. [2024-11-13 12:59:05,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 310 states have (on average 1.1870967741935483) internal successors, (368), 314 states have internal predecessors, (368), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-13 12:59:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 447 transitions. [2024-11-13 12:59:05,311 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 447 transitions. Word has length 55 [2024-11-13 12:59:05,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:59:05,312 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 447 transitions. [2024-11-13 12:59:05,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:59:05,312 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 447 transitions. [2024-11-13 12:59:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 12:59:05,313 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:59:05,313 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:05,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-13 12:59:05,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:05,514 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:59:05,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:05,515 INFO L85 PathProgramCache]: Analyzing trace with hash 69926020, now seen corresponding path program 1 times [2024-11-13 12:59:05,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:59:05,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085529767] [2024-11-13 12:59:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:05,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:05,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:05,518 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:05,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-13 12:59:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:05,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 12:59:05,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:59:07,845 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:09,644 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:59:09,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085529767] [2024-11-13 12:59:09,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085529767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:09,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [777989689] [2024-11-13 12:59:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:09,645 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 12:59:09,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 12:59:09,647 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 12:59:09,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2024-11-13 12:59:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:09,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 12:59:09,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:59:10,266 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:59:10,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [777989689] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:59:10,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:59:10,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-11-13 12:59:10,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402732663] [2024-11-13 12:59:10,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:59:10,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 12:59:10,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:59:10,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 12:59:10,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:59:10,267 INFO L87 Difference]: Start difference. First operand 358 states and 447 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:59:11,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:59:11,766 INFO L93 Difference]: Finished difference Result 378 states and 469 transitions. [2024-11-13 12:59:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:59:11,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-11-13 12:59:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:59:11,769 INFO L225 Difference]: With dead ends: 378 [2024-11-13 12:59:11,769 INFO L226 Difference]: Without dead ends: 376 [2024-11-13 12:59:11,769 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:59:11,770 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:59:11,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 509 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 12:59:11,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2024-11-13 12:59:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 365. [2024-11-13 12:59:11,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 313 states have (on average 1.1853035143769968) internal successors, (371), 320 states have internal predecessors, (371), 42 states have call successors, (42), 7 states have call predecessors, (42), 9 states have return successors, (43), 40 states have call predecessors, (43), 40 states have call successors, (43) [2024-11-13 12:59:11,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 456 transitions. [2024-11-13 12:59:11,808 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 456 transitions. Word has length 55 [2024-11-13 12:59:11,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:59:11,809 INFO L471 AbstractCegarLoop]: Abstraction has 365 states and 456 transitions. [2024-11-13 12:59:11,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:59:11,809 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 456 transitions. [2024-11-13 12:59:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-13 12:59:11,810 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:59:11,810 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:11,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2024-11-13 12:59:12,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-13 12:59:12,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:12,211 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:59:12,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:12,212 INFO L85 PathProgramCache]: Analyzing trace with hash -225389381, now seen corresponding path program 1 times [2024-11-13 12:59:12,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:59:12,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232140858] [2024-11-13 12:59:12,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:12,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:12,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:12,214 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:12,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-13 12:59:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:12,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 12:59:12,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:59:14,386 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:59:14,386 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:59:14,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232140858] [2024-11-13 12:59:14,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232140858] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:59:14,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:59:14,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-13 12:59:14,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498006780] [2024-11-13 12:59:14,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:59:14,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 12:59:14,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:59:14,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 12:59:14,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:59:14,387 INFO L87 Difference]: Start difference. First operand 365 states and 456 transitions. Second operand has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 12:59:18,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:59:18,331 INFO L93 Difference]: Finished difference Result 419 states and 522 transitions. [2024-11-13 12:59:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 12:59:18,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2024-11-13 12:59:18,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:59:18,334 INFO L225 Difference]: With dead ends: 419 [2024-11-13 12:59:18,334 INFO L226 Difference]: Without dead ends: 372 [2024-11-13 12:59:18,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:59:18,337 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 77 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:59:18,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 990 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-13 12:59:18,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2024-11-13 12:59:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 340. [2024-11-13 12:59:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 291 states have (on average 1.1855670103092784) internal successors, (345), 297 states have internal predecessors, (345), 39 states have call successors, (39), 7 states have call predecessors, (39), 9 states have return successors, (40), 37 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-13 12:59:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 424 transitions. [2024-11-13 12:59:18,377 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 424 transitions. Word has length 56 [2024-11-13 12:59:18,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:59:18,378 INFO L471 AbstractCegarLoop]: Abstraction has 340 states and 424 transitions. [2024-11-13 12:59:18,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 12:59:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 424 transitions. [2024-11-13 12:59:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-13 12:59:18,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:59:18,379 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:18,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef6e7949-2d00-42b7-b3f7-f2500302bb58/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0