./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.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_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/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_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/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_440b0a05-ed07-42a4-9907-531ad1948aa1/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 a3c408aeb75b378569a9828f29f37caa03495bee0afeec4c4af831c79f34806f --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 14:25:04,809 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:25:04,888 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 14:25:04,902 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:25:04,906 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:25:04,952 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:25:04,954 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:25:04,955 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:25:04,955 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:25:04,956 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:25:04,957 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:25:04,957 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:25:04,957 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:25:04,958 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:25:04,958 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:25:04,959 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:25:04,959 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 14:25:04,959 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:25:04,959 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:25:04,959 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:25:04,960 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:25:04,960 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 14:25:04,960 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:25:04,960 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 14:25:04,960 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:25:04,960 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:25:04,960 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 14:25:04,961 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:25:04,961 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:25:04,961 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:25:04,961 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:25:04,962 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:25:04,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:25:04,962 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:25:04,962 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:25:04,962 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 14:25:04,963 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:25:04,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:25:04,964 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:25:04,964 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:25:04,964 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:25:04,964 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:25:04,964 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_440b0a05-ed07-42a4-9907-531ad1948aa1/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 -> a3c408aeb75b378569a9828f29f37caa03495bee0afeec4c4af831c79f34806f [2024-11-13 14:25:05,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:25:05,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:25:05,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:25:05,339 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:25:05,339 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:25:05,341 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c Unable to find full path for "g++" [2024-11-13 14:25:07,333 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:25:07,694 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:25:07,695 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c [2024-11-13 14:25:07,709 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/data/4305d8bb9/b3446c183aff4df19218e7512045cd6a/FLAGe0250bc57 [2024-11-13 14:25:07,927 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/data/4305d8bb9/b3446c183aff4df19218e7512045cd6a [2024-11-13 14:25:07,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:25:07,931 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:25:07,932 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:25:07,932 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:25:07,936 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:25:07,937 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:25:07" (1/1) ... [2024-11-13 14:25:07,938 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fdd8010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:07, skipping insertion in model container [2024-11-13 14:25:07,938 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:25:07" (1/1) ... [2024-11-13 14:25:07,956 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:25:08,162 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_440b0a05-ed07-42a4-9907-531ad1948aa1/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c[538,551] [2024-11-13 14:25:08,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:25:08,206 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:25:08,218 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_440b0a05-ed07-42a4-9907-531ad1948aa1/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c[538,551] [2024-11-13 14:25:08,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:25:08,258 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:25:08,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:08 WrapperNode [2024-11-13 14:25:08,259 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:25:08,262 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:25:08,262 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:25:08,262 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:25:08,269 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:08" (1/1) ... [2024-11-13 14:25:08,276 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:08" (1/1) ... [2024-11-13 14:25:08,304 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-11-13 14:25:08,304 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:25:08,305 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:25:08,308 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:25:08,308 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:25:08,318 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:08" (1/1) ... [2024-11-13 14:25:08,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:08" (1/1) ... [2024-11-13 14:25:08,320 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:08" (1/1) ... [2024-11-13 14:25:08,333 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 14:25:08,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:08" (1/1) ... [2024-11-13 14:25:08,333 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:08" (1/1) ... [2024-11-13 14:25:08,337 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:08" (1/1) ... [2024-11-13 14:25:08,341 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:08" (1/1) ... [2024-11-13 14:25:08,342 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:08" (1/1) ... [2024-11-13 14:25:08,343 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:08" (1/1) ... [2024-11-13 14:25:08,345 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:25:08,346 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:25:08,346 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:25:08,346 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:25:08,347 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:08" (1/1) ... [2024-11-13 14:25:08,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:25:08,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:08,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:25:08,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:25:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 14:25:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-13 14:25:08,423 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-13 14:25:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 14:25:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:25:08,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:25:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 14:25:08,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 14:25:08,505 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:25:08,508 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:25:08,757 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-13 14:25:08,758 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:25:08,769 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:25:08,769 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 14:25:08,769 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:25:08 BoogieIcfgContainer [2024-11-13 14:25:08,770 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:25:08,773 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:25:08,773 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:25:08,779 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:25:08,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:25:07" (1/3) ... [2024-11-13 14:25:08,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105347c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:25:08, skipping insertion in model container [2024-11-13 14:25:08,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:08" (2/3) ... [2024-11-13 14:25:08,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105347c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:25:08, skipping insertion in model container [2024-11-13 14:25:08,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:25:08" (3/3) ... [2024-11-13 14:25:08,782 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound50.c [2024-11-13 14:25:08,801 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:25:08,803 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG hard-ll_valuebound50.c that has 3 procedures, 33 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-13 14:25:08,874 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:25:08,891 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;@43d906f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:25:08,892 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 14:25:08,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-13 14:25:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 14:25:08,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:08,906 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:08,906 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:08,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:08,912 INFO L85 PathProgramCache]: Analyzing trace with hash 762610409, now seen corresponding path program 1 times [2024-11-13 14:25:08,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:08,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173061649] [2024-11-13 14:25:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:08,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:09,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:25:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:09,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:25:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:09,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:25:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:25:09,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:09,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173061649] [2024-11-13 14:25:09,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173061649] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:09,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:09,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:25:09,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20511028] [2024-11-13 14:25:09,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:09,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 14:25:09,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:09,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 14:25:09,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 14:25:09,206 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 14:25:09,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:09,236 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2024-11-13 14:25:09,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 14:25:09,238 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-11-13 14:25:09,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:09,246 INFO L225 Difference]: With dead ends: 63 [2024-11-13 14:25:09,246 INFO L226 Difference]: Without dead ends: 29 [2024-11-13 14:25:09,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 14:25:09,255 INFO L432 NwaCegarLoop]: 43 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, 43 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 14:25:09,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:25:09,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-13 14:25:09,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-13 14:25:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-13 14:25:09,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2024-11-13 14:25:09,311 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2024-11-13 14:25:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:09,311 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2024-11-13 14:25:09,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 14:25:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2024-11-13 14:25:09,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 14:25:09,315 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:09,315 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:09,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 14:25:09,315 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:09,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:09,316 INFO L85 PathProgramCache]: Analyzing trace with hash -386096921, now seen corresponding path program 1 times [2024-11-13 14:25:09,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:09,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332136724] [2024-11-13 14:25:09,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:09,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:09,697 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:25:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:09,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:25:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:09,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:25:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:25:09,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:09,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332136724] [2024-11-13 14:25:09,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332136724] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:09,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:09,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:25:09,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203431683] [2024-11-13 14:25:09,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:09,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:25:09,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:09,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:25:09,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:25:09,720 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 14:25:09,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:09,846 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2024-11-13 14:25:09,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:25:09,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 24 [2024-11-13 14:25:09,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:09,852 INFO L225 Difference]: With dead ends: 42 [2024-11-13 14:25:09,853 INFO L226 Difference]: Without dead ends: 40 [2024-11-13 14:25:09,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:25:09,855 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:25:09,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 126 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:25:09,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-13 14:25:09,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2024-11-13 14:25:09,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-13 14:25:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2024-11-13 14:25:09,876 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2024-11-13 14:25:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:09,879 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2024-11-13 14:25:09,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 14:25:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2024-11-13 14:25:09,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 14:25:09,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:09,880 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] [2024-11-13 14:25:09,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 14:25:09,881 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:09,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:09,881 INFO L85 PathProgramCache]: Analyzing trace with hash -70748774, now seen corresponding path program 1 times [2024-11-13 14:25:09,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:09,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164079823] [2024-11-13 14:25:09,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:09,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:10,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:25:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:10,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:25:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:10,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:25:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:10,168 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:25:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:25:10,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:10,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164079823] [2024-11-13 14:25:10,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164079823] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:10,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:10,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:25:10,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529051654] [2024-11-13 14:25:10,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:10,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:25:10,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:10,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:25:10,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:25:10,221 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 14:25:10,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:10,319 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2024-11-13 14:25:10,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:25:10,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 29 [2024-11-13 14:25:10,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:10,321 INFO L225 Difference]: With dead ends: 46 [2024-11-13 14:25:10,321 INFO L226 Difference]: Without dead ends: 44 [2024-11-13 14:25:10,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:25:10,322 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:25:10,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 123 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:25:10,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-13 14:25:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-11-13 14:25:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-13 14:25:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-11-13 14:25:10,332 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2024-11-13 14:25:10,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:10,332 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-11-13 14:25:10,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 14:25:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-11-13 14:25:10,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 14:25:10,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:10,333 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:10,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 14:25:10,333 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:10,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:10,334 INFO L85 PathProgramCache]: Analyzing trace with hash -456019833, now seen corresponding path program 1 times [2024-11-13 14:25:10,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:10,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817884951] [2024-11-13 14:25:10,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:10,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:25:10,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753404542] [2024-11-13 14:25:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:10,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:10,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:10,360 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:10,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:25:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:10,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 14:25:10,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 14:25:10,631 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:25:10,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:10,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817884951] [2024-11-13 14:25:10,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:25:10,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753404542] [2024-11-13 14:25:10,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753404542] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:10,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:10,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:25:10,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404676891] [2024-11-13 14:25:10,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:10,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:25:10,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:10,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:25:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:25:10,638 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 14:25:10,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:10,747 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2024-11-13 14:25:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:25:10,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2024-11-13 14:25:10,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:10,749 INFO L225 Difference]: With dead ends: 63 [2024-11-13 14:25:10,750 INFO L226 Difference]: Without dead ends: 50 [2024-11-13 14:25:10,750 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:25:10,751 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:25:10,751 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 124 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:25:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-13 14:25:10,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-13 14:25:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-13 14:25:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2024-11-13 14:25:10,779 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 34 [2024-11-13 14:25:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:10,779 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2024-11-13 14:25:10,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 14:25:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2024-11-13 14:25:10,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 14:25:10,781 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:10,781 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 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] [2024-11-13 14:25:10,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 14:25:10,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:10,985 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:10,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:10,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1400226202, now seen corresponding path program 1 times [2024-11-13 14:25:10,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:10,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359355778] [2024-11-13 14:25:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:10,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:25:11,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937118872] [2024-11-13 14:25:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:11,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:11,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:11,033 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:11,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:25:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:11,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 14:25:11,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 14:25:11,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 14:25:11,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:11,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359355778] [2024-11-13 14:25:11,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:25:11,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937118872] [2024-11-13 14:25:11,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937118872] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:11,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:25:11,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-13 14:25:11,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776439859] [2024-11-13 14:25:11,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:11,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:25:11,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:11,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:25:11,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:25:11,641 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 14:25:11,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:11,850 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2024-11-13 14:25:11,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:25:11,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 41 [2024-11-13 14:25:11,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:11,853 INFO L225 Difference]: With dead ends: 65 [2024-11-13 14:25:11,853 INFO L226 Difference]: Without dead ends: 63 [2024-11-13 14:25:11,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:25:11,854 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:25:11,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 161 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:25:11,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-13 14:25:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2024-11-13 14:25:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-13 14:25:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2024-11-13 14:25:11,874 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 41 [2024-11-13 14:25:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:11,875 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2024-11-13 14:25:11,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 14:25:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2024-11-13 14:25:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 14:25:11,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:11,881 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:11,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 14:25:12,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:12,081 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:12,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:12,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1581824840, now seen corresponding path program 1 times [2024-11-13 14:25:12,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:12,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328751334] [2024-11-13 14:25:12,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:12,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:25:12,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656569493] [2024-11-13 14:25:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:12,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:12,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:12,152 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:12,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:25:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:12,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 14:25:12,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-13 14:25:12,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-13 14:25:12,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:12,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328751334] [2024-11-13 14:25:12,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:25:12,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656569493] [2024-11-13 14:25:12,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656569493] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:12,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:25:12,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-13 14:25:12,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2534205] [2024-11-13 14:25:12,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:12,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:25:12,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:25:12,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:25:12,561 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 14:25:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:12,715 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2024-11-13 14:25:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:25:12,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2024-11-13 14:25:12,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:12,718 INFO L225 Difference]: With dead ends: 70 [2024-11-13 14:25:12,720 INFO L226 Difference]: Without dead ends: 68 [2024-11-13 14:25:12,721 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:25:12,722 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:25:12,722 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:25:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-13 14:25:12,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-11-13 14:25:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-13 14:25:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2024-11-13 14:25:12,752 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 51 [2024-11-13 14:25:12,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:12,753 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2024-11-13 14:25:12,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 14:25:12,753 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2024-11-13 14:25:12,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-13 14:25:12,755 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:12,755 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2024-11-13 14:25:12,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 14:25:12,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 14:25:12,959 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:12,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:12,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1130953491, now seen corresponding path program 1 times [2024-11-13 14:25:12,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:12,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768267359] [2024-11-13 14:25:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:12,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:13,174 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:25:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:13,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:25:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:13,187 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:25:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:13,192 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:25:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:13,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-13 14:25:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:13,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-13 14:25:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:13,226 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 14:25:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:13,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 14:25:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:13,254 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-11-13 14:25:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-13 14:25:13,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:13,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768267359] [2024-11-13 14:25:13,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768267359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:13,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:13,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:25:13,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872332013] [2024-11-13 14:25:13,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:13,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:25:13,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:13,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:25:13,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:25:13,268 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-13 14:25:13,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:13,375 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2024-11-13 14:25:13,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:25:13,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 57 [2024-11-13 14:25:13,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:13,377 INFO L225 Difference]: With dead ends: 75 [2024-11-13 14:25:13,377 INFO L226 Difference]: Without dead ends: 63 [2024-11-13 14:25:13,378 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:25:13,379 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:25:13,383 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 134 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:25:13,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-13 14:25:13,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-13 14:25:13,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-13 14:25:13,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2024-11-13 14:25:13,411 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 57 [2024-11-13 14:25:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:13,413 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2024-11-13 14:25:13,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-13 14:25:13,414 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2024-11-13 14:25:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-13 14:25:13,415 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:13,415 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 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] [2024-11-13 14:25:13,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 14:25:13,416 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:13,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:13,416 INFO L85 PathProgramCache]: Analyzing trace with hash 453490139, now seen corresponding path program 1 times [2024-11-13 14:25:13,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:13,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487693819] [2024-11-13 14:25:13,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:13,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:25:13,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835719363] [2024-11-13 14:25:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:13,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:13,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:13,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:13,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:25:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:13,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 14:25:13,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-11-13 14:25:14,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-13 14:25:17,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:17,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487693819] [2024-11-13 14:25:17,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:25:17,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835719363] [2024-11-13 14:25:17,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835719363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:17,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:25:17,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-11-13 14:25:17,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548103507] [2024-11-13 14:25:17,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:17,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 14:25:17,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:17,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 14:25:17,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-11-13 14:25:17,374 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-13 14:25:21,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:25:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:21,914 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2024-11-13 14:25:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 14:25:21,915 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 71 [2024-11-13 14:25:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:21,921 INFO L225 Difference]: With dead ends: 150 [2024-11-13 14:25:21,921 INFO L226 Difference]: Without dead ends: 127 [2024-11-13 14:25:21,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-11-13 14:25:21,923 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:25:21,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 328 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-13 14:25:21,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-13 14:25:21,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 102. [2024-11-13 14:25:21,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 61 states have (on average 1.180327868852459) internal successors, (72), 65 states have internal predecessors, (72), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-13 14:25:21,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 129 transitions. [2024-11-13 14:25:21,968 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 129 transitions. Word has length 71 [2024-11-13 14:25:21,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:21,969 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 129 transitions. [2024-11-13 14:25:21,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-13 14:25:21,969 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 129 transitions. [2024-11-13 14:25:21,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-13 14:25:21,973 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:21,974 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:21,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 14:25:22,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:22,178 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:22,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:22,179 INFO L85 PathProgramCache]: Analyzing trace with hash -746700807, now seen corresponding path program 1 times [2024-11-13 14:25:22,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:22,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941709898] [2024-11-13 14:25:22,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:22,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:25:22,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47100777] [2024-11-13 14:25:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:22,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:22,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:22,214 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:22,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:25:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:22,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 14:25:22,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-11-13 14:25:22,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-13 14:25:23,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:23,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941709898] [2024-11-13 14:25:23,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:25:23,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47100777] [2024-11-13 14:25:23,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47100777] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:23,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:25:23,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-11-13 14:25:23,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141380081] [2024-11-13 14:25:23,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:23,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 14:25:23,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:23,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 14:25:23,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-13 14:25:23,888 INFO L87 Difference]: Start difference. First operand 102 states and 129 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2024-11-13 14:25:24,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:24,694 INFO L93 Difference]: Finished difference Result 142 states and 177 transitions. [2024-11-13 14:25:24,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 14:25:24,695 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 82 [2024-11-13 14:25:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:24,696 INFO L225 Difference]: With dead ends: 142 [2024-11-13 14:25:24,696 INFO L226 Difference]: Without dead ends: 108 [2024-11-13 14:25:24,697 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-11-13 14:25:24,697 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:25:24,698 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 439 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 14:25:24,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-13 14:25:24,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2024-11-13 14:25:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 59 states have internal predecessors, (66), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-13 14:25:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2024-11-13 14:25:24,734 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 82 [2024-11-13 14:25:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:24,734 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2024-11-13 14:25:24,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2024-11-13 14:25:24,735 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2024-11-13 14:25:24,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-13 14:25:24,738 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:24,738 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:24,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 14:25:24,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:24,939 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:24,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:24,940 INFO L85 PathProgramCache]: Analyzing trace with hash 52835029, now seen corresponding path program 2 times [2024-11-13 14:25:24,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:24,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039759268] [2024-11-13 14:25:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:24,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:25,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:25:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:25,256 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:25:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:25,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:25:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:25,261 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:25:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:25,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-13 14:25:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:25,271 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-13 14:25:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:25,276 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 14:25:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:25,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 14:25:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:25,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 14:25:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:25,293 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-13 14:25:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:25,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 14:25:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:25,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-13 14:25:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:25,319 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-11-13 14:25:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-13 14:25:25,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:25,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039759268] [2024-11-13 14:25:25,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039759268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:25,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105034316] [2024-11-13 14:25:25,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:25:25,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:25,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:25,330 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:25,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:25:25,421 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:25:25,421 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:25:25,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 14:25:25,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-13 14:25:25,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-13 14:25:25,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105034316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:25,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:25:25,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-13 14:25:25,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272656155] [2024-11-13 14:25:25,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:25,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:25:25,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:25,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:25:25,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:25:25,606 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-13 14:25:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:25,681 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2024-11-13 14:25:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:25:25,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 84 [2024-11-13 14:25:25,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:25,683 INFO L225 Difference]: With dead ends: 121 [2024-11-13 14:25:25,683 INFO L226 Difference]: Without dead ends: 99 [2024-11-13 14:25:25,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:25:25,685 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:25:25,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:25:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-13 14:25:25,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-13 14:25:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-13 14:25:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 122 transitions. [2024-11-13 14:25:25,719 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 122 transitions. Word has length 84 [2024-11-13 14:25:25,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:25,720 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 122 transitions. [2024-11-13 14:25:25,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-13 14:25:25,720 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 122 transitions. [2024-11-13 14:25:25,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-13 14:25:25,721 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:25,721 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2024-11-13 14:25:25,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 14:25:25,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 14:25:25,922 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:25,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:25,922 INFO L85 PathProgramCache]: Analyzing trace with hash -340072312, now seen corresponding path program 1 times [2024-11-13 14:25:25,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:25,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21657969] [2024-11-13 14:25:25,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:25,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,331 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:25:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,334 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:25:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,338 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:25:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,345 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:25:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-13 14:25:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-13 14:25:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 14:25:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 14:25:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 14:25:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,407 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-13 14:25:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,418 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 14:25:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,424 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-13 14:25:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-11-13 14:25:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,436 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-13 14:25:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-13 14:25:26,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:26,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21657969] [2024-11-13 14:25:26,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21657969] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:26,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393178796] [2024-11-13 14:25:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:26,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:26,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:26,446 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:26,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:25:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:26,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 14:25:26,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-11-13 14:25:27,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-13 14:25:27,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393178796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:27,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:25:27,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-11-13 14:25:27,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452966142] [2024-11-13 14:25:27,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:27,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 14:25:27,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:27,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 14:25:27,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-13 14:25:27,606 INFO L87 Difference]: Start difference. First operand 99 states and 122 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-11-13 14:25:28,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:28,014 INFO L93 Difference]: Finished difference Result 114 states and 142 transitions. [2024-11-13 14:25:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 14:25:28,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 87 [2024-11-13 14:25:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:28,016 INFO L225 Difference]: With dead ends: 114 [2024-11-13 14:25:28,016 INFO L226 Difference]: Without dead ends: 97 [2024-11-13 14:25:28,017 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:25:28,017 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 22 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:25:28,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 375 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:25:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-13 14:25:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2024-11-13 14:25:28,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-13 14:25:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2024-11-13 14:25:28,044 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 87 [2024-11-13 14:25:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:28,045 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2024-11-13 14:25:28,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-11-13 14:25:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2024-11-13 14:25:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-13 14:25:28,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:28,046 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-13 14:25:28,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 14:25:28,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:28,250 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:28,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:28,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1355608333, now seen corresponding path program 1 times [2024-11-13 14:25:28,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:28,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666512465] [2024-11-13 14:25:28,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:28,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:25:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:25:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,364 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:25:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,366 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:25:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-13 14:25:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,373 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-13 14:25:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,377 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 14:25:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,380 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 14:25:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,384 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 14:25:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,388 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-13 14:25:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,392 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 14:25:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-11-13 14:25:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-13 14:25:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,404 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-11-13 14:25:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,408 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-11-13 14:25:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-13 14:25:28,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:28,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666512465] [2024-11-13 14:25:28,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666512465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:28,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669187971] [2024-11-13 14:25:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:28,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:28,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:28,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:28,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 14:25:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:28,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 14:25:28,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2024-11-13 14:25:28,523 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:25:28,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669187971] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:28,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:25:28,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-11-13 14:25:28,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839618878] [2024-11-13 14:25:28,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:28,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:25:28,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:28,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:25:28,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:25:28,526 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-13 14:25:28,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:28,617 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2024-11-13 14:25:28,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:25:28,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2024-11-13 14:25:28,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:28,619 INFO L225 Difference]: With dead ends: 97 [2024-11-13 14:25:28,620 INFO L226 Difference]: Without dead ends: 85 [2024-11-13 14:25:28,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:25:28,621 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 7 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:25:28,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 116 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:25:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-13 14:25:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-11-13 14:25:28,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-13 14:25:28,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2024-11-13 14:25:28,651 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 91 [2024-11-13 14:25:28,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:28,652 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2024-11-13 14:25:28,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-13 14:25:28,652 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2024-11-13 14:25:28,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-13 14:25:28,653 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:28,654 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:28,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 14:25:28,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:28,854 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:28,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:28,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1214285626, now seen corresponding path program 3 times [2024-11-13 14:25:28,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:28,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601743527] [2024-11-13 14:25:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:28,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:25:28,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142033385] [2024-11-13 14:25:28,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:25:28,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:28,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:28,902 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:28,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 14:25:28,997 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 14:25:28,997 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:25:28,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 14:25:29,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-11-13 14:25:30,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-13 14:25:46,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:46,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601743527] [2024-11-13 14:25:46,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:25:46,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142033385] [2024-11-13 14:25:46,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142033385] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:46,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:25:46,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2024-11-13 14:25:46,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63058845] [2024-11-13 14:25:46,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:46,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 14:25:46,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:46,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 14:25:46,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:25:46,597 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-11-13 14:25:53,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:25:55,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:55,685 INFO L93 Difference]: Finished difference Result 165 states and 218 transitions. [2024-11-13 14:25:55,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 14:25:55,687 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 101 [2024-11-13 14:25:55,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:55,689 INFO L225 Difference]: With dead ends: 165 [2024-11-13 14:25:55,689 INFO L226 Difference]: Without dead ends: 143 [2024-11-13 14:25:55,690 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2024-11-13 14:25:55,690 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 91 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:25:55,691 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 475 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-13 14:25:55,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-13 14:25:55,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 128. [2024-11-13 14:25:55,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 80 states have internal predecessors, (88), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-13 14:25:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 161 transitions. [2024-11-13 14:25:55,766 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 161 transitions. Word has length 101 [2024-11-13 14:25:55,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:55,767 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 161 transitions. [2024-11-13 14:25:55,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-11-13 14:25:55,767 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 161 transitions. [2024-11-13 14:25:55,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-13 14:25:55,769 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:55,769 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:55,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 14:25:55,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 14:25:55,970 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:55,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:55,970 INFO L85 PathProgramCache]: Analyzing trace with hash -236188626, now seen corresponding path program 2 times [2024-11-13 14:25:55,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:55,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313567647] [2024-11-13 14:25:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:55,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:25:56,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988816738] [2024-11-13 14:25:56,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:25:56,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:56,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:56,014 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:56,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 14:25:56,109 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:25:56,109 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:25:56,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 14:25:56,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 124 proven. 22 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2024-11-13 14:25:56,318 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-13 14:25:56,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:56,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313567647] [2024-11-13 14:25:56,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:25:56,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988816738] [2024-11-13 14:25:56,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988816738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:56,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:25:56,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2024-11-13 14:25:56,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720279556] [2024-11-13 14:25:56,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:56,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 14:25:56,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:56,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 14:25:56,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:25:56,570 INFO L87 Difference]: Start difference. First operand 128 states and 161 transitions. Second operand has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-13 14:25:57,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:57,290 INFO L93 Difference]: Finished difference Result 144 states and 175 transitions. [2024-11-13 14:25:57,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 14:25:57,291 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 112 [2024-11-13 14:25:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:57,293 INFO L225 Difference]: With dead ends: 144 [2024-11-13 14:25:57,293 INFO L226 Difference]: Without dead ends: 142 [2024-11-13 14:25:57,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-11-13 14:25:57,294 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 27 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:25:57,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 167 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:25:57,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-13 14:25:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2024-11-13 14:25:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 91 states have internal predecessors, (98), 38 states have call successors, (38), 16 states have call predecessors, (38), 16 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-13 14:25:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 173 transitions. [2024-11-13 14:25:57,354 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 173 transitions. Word has length 112 [2024-11-13 14:25:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:57,354 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 173 transitions. [2024-11-13 14:25:57,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-13 14:25:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 173 transitions. [2024-11-13 14:25:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-13 14:25:57,356 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:57,356 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:57,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-13 14:25:57,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 14:25:57,560 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:57,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:57,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1028769226, now seen corresponding path program 4 times [2024-11-13 14:25:57,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:57,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651863929] [2024-11-13 14:25:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:57,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:25:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:25:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,913 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:25:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,915 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:25:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,918 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-13 14:25:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,922 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-13 14:25:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 14:25:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,929 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 14:25:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 14:25:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,937 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-13 14:25:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,941 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 14:25:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,945 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-11-13 14:25:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,949 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-13 14:25:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-11-13 14:25:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-11-13 14:25:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-11-13 14:25:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,966 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-11-13 14:25:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-11-13 14:25:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-11-13 14:25:57,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:57,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651863929] [2024-11-13 14:25:57,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651863929] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:57,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595338382] [2024-11-13 14:25:57,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:25:57,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:57,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:57,978 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:57,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 14:25:58,075 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:25:58,076 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:25:58,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 14:25:58,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-11-13 14:25:58,147 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 43 proven. 23 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-11-13 14:25:58,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595338382] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:58,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:25:58,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-11-13 14:25:58,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120774023] [2024-11-13 14:25:58,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:58,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 14:25:58,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:58,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 14:25:58,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:25:58,446 INFO L87 Difference]: Start difference. First operand 142 states and 173 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2024-11-13 14:25:58,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:25:58,624 INFO L93 Difference]: Finished difference Result 174 states and 215 transitions. [2024-11-13 14:25:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:25:58,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) Word has length 114 [2024-11-13 14:25:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:25:58,627 INFO L225 Difference]: With dead ends: 174 [2024-11-13 14:25:58,627 INFO L226 Difference]: Without dead ends: 146 [2024-11-13 14:25:58,628 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:25:58,630 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:25:58,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 145 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:25:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-13 14:25:58,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2024-11-13 14:25:58,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 88 states have (on average 1.125) internal successors, (99), 93 states have internal predecessors, (99), 39 states have call successors, (39), 16 states have call predecessors, (39), 16 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-13 14:25:58,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 176 transitions. [2024-11-13 14:25:58,700 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 176 transitions. Word has length 114 [2024-11-13 14:25:58,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:25:58,701 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 176 transitions. [2024-11-13 14:25:58,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2024-11-13 14:25:58,701 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 176 transitions. [2024-11-13 14:25:58,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-13 14:25:58,703 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:25:58,703 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:58,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-13 14:25:58,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 14:25:58,907 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:25:58,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:58,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1081963891, now seen corresponding path program 2 times [2024-11-13 14:25:58,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:58,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126016253] [2024-11-13 14:25:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:58,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,412 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:25:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:25:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,418 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:25:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,421 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:25:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-13 14:25:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-13 14:25:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,435 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 14:25:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,441 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 14:25:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,450 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 14:25:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-13 14:25:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 14:25:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,470 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-11-13 14:25:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,477 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-13 14:25:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,485 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-11-13 14:25:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,505 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-11-13 14:25:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,510 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-11-13 14:25:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,520 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-11-13 14:25:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,528 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-11-13 14:25:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,536 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2024-11-13 14:25:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-11-13 14:25:59,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:59,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126016253] [2024-11-13 14:25:59,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126016253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:59,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936638196] [2024-11-13 14:25:59,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:25:59,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:59,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:59,545 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:59,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 14:25:59,632 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:25:59,632 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:25:59,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-13 14:25:59,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:26:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-11-13 14:26:00,427 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:26:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-11-13 14:26:01,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936638196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:26:01,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:26:01,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 30 [2024-11-13 14:26:01,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720741281] [2024-11-13 14:26:01,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:26:01,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-13 14:26:01,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:26:01,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-13 14:26:01,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-11-13 14:26:01,679 INFO L87 Difference]: Start difference. First operand 144 states and 176 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) [2024-11-13 14:26:02,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:26:02,831 INFO L93 Difference]: Finished difference Result 161 states and 199 transitions. [2024-11-13 14:26:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 14:26:02,832 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) Word has length 117 [2024-11-13 14:26:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:26:02,834 INFO L225 Difference]: With dead ends: 161 [2024-11-13 14:26:02,834 INFO L226 Difference]: Without dead ends: 133 [2024-11-13 14:26:02,835 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 14:26:02,835 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 27 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:26:02,836 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 506 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 14:26:02,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-13 14:26:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2024-11-13 14:26:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 83 states have internal predecessors, (88), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-13 14:26:02,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2024-11-13 14:26:02,907 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 117 [2024-11-13 14:26:02,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:26:02,908 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2024-11-13 14:26:02,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) [2024-11-13 14:26:02,908 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2024-11-13 14:26:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-13 14:26:02,910 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:26:02,910 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:26:02,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 14:26:03,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 14:26:03,110 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:26:03,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:26:03,111 INFO L85 PathProgramCache]: Analyzing trace with hash 86560763, now seen corresponding path program 5 times [2024-11-13 14:26:03,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:26:03,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153916432] [2024-11-13 14:26:03,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:26:03,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:26:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:26:03,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805716230] [2024-11-13 14:26:03,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:26:03,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:26:03,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:26:03,230 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:26:03,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 14:26:03,573 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-13 14:26:03,573 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:26:03,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-13 14:26:03,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:26:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 44 proven. 94 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2024-11-13 14:26:04,609 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:26:36,106 WARN L286 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 378 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:27:43,054 WARN L286 SmtUtils]: Spent 12.51s on a formula simplification that was a NOOP. DAG size: 381 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:29:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 44 proven. 94 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2024-11-13 14:29:31,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:29:31,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153916432] [2024-11-13 14:29:31,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:29:31,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805716230] [2024-11-13 14:29:31,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805716230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:29:31,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:29:31,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2024-11-13 14:29:31,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150417700] [2024-11-13 14:29:31,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:29:31,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 14:29:31,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:29:31,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 14:29:31,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2024-11-13 14:29:31,050 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 29 states have internal predecessors, (57), 18 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 15 states have call predecessors, (39), 16 states have call successors, (39) [2024-11-13 14:29:42,021 WARN L286 SmtUtils]: Spent 8.66s on a formula simplification. DAG size of input: 595 DAG size of output: 43 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:29:43,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:29:48,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:29:50,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:30:03,461 WARN L286 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 598 DAG size of output: 47 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:30:23,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:30:29,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:30:32,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:30:36,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:30:39,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:30:41,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:30:44,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:30:48,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:30:52,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:31:24,950 WARN L286 SmtUtils]: Spent 22.94s on a formula simplification. DAG size of input: 530 DAG size of output: 49 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:31:27,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:31:29,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:31:32,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:31:37,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:32:25,250 WARN L286 SmtUtils]: Spent 35.58s on a formula simplification. DAG size of input: 494 DAG size of output: 54 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:32:29,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:32:30,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:32:33,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:32:44,259 WARN L286 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 175 DAG size of output: 44 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:32:47,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.91s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:32:52,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:32:52,992 INFO L93 Difference]: Finished difference Result 283 states and 391 transitions. [2024-11-13 14:32:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 14:32:52,993 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 29 states have internal predecessors, (57), 18 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 15 states have call predecessors, (39), 16 states have call successors, (39) Word has length 131 [2024-11-13 14:32:52,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:32:52,996 INFO L225 Difference]: With dead ends: 283 [2024-11-13 14:32:52,996 INFO L226 Difference]: Without dead ends: 255 [2024-11-13 14:32:52,998 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 153.6s TimeCoverageRelationStatistics Valid=494, Invalid=1575, Unknown=1, NotChecked=0, Total=2070 [2024-11-13 14:32:52,999 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 136 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 237 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:32:52,999 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 822 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 851 Invalid, 4 Unknown, 0 Unchecked, 76.6s Time] [2024-11-13 14:32:53,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-13 14:32:53,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 208. [2024-11-13 14:32:53,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 134 states have internal predecessors, (149), 61 states have call successors, (61), 20 states have call predecessors, (61), 20 states have return successors, (60), 53 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-13 14:32:53,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 270 transitions. [2024-11-13 14:32:53,141 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 270 transitions. Word has length 131 [2024-11-13 14:32:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:32:53,142 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 270 transitions. [2024-11-13 14:32:53,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 29 states have internal predecessors, (57), 18 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 15 states have call predecessors, (39), 16 states have call successors, (39) [2024-11-13 14:32:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 270 transitions. [2024-11-13 14:32:53,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-13 14:32:53,144 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:32:53,145 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:32:53,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 14:32:53,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 14:32:53,346 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:32:53,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:32:53,346 INFO L85 PathProgramCache]: Analyzing trace with hash -912014680, now seen corresponding path program 3 times [2024-11-13 14:32:53,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:32:53,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527919874] [2024-11-13 14:32:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:32:53,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:32:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,330 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:32:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,334 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:32:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,337 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:32:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,340 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:32:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,352 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-13 14:32:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-13 14:32:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,380 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 14:32:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,392 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 14:32:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 14:32:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,410 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-13 14:32:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 14:32:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-11-13 14:32:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,441 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-13 14:32:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-11-13 14:32:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,463 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-11-13 14:32:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,472 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-11-13 14:32:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-11-13 14:32:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-11-13 14:32:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,492 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-11-13 14:32:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,498 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2024-11-13 14:32:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,508 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-11-13 14:32:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,514 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-11-13 14:32:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,520 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2024-11-13 14:32:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,526 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2024-11-13 14:32:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:32:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 42 proven. 57 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2024-11-13 14:32:54,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:32:54,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527919874] [2024-11-13 14:32:54,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527919874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:32:54,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938708562] [2024-11-13 14:32:54,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:32:54,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:32:54,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:32:54,536 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:32:54,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 14:32:54,625 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 14:32:54,625 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:32:54,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 14:32:54,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:32:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 101 proven. 10 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-11-13 14:32:54,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:32:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 101 proven. 4 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2024-11-13 14:32:55,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938708562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:32:55,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:32:55,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 7] total 22 [2024-11-13 14:32:55,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912027081] [2024-11-13 14:32:55,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:32:55,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 14:32:55,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:32:55,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 14:32:55,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:32:55,220 INFO L87 Difference]: Start difference. First operand 208 states and 270 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 13 states have call predecessors, (35), 11 states have call successors, (35) [2024-11-13 14:32:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:32:56,364 INFO L93 Difference]: Finished difference Result 270 states and 341 transitions. [2024-11-13 14:32:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 14:32:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 13 states have call predecessors, (35), 11 states have call successors, (35) Word has length 147 [2024-11-13 14:32:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:32:56,367 INFO L225 Difference]: With dead ends: 270 [2024-11-13 14:32:56,367 INFO L226 Difference]: Without dead ends: 156 [2024-11-13 14:32:56,368 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 14:32:56,368 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 55 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:32:56,369 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 489 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 14:32:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-13 14:32:56,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2024-11-13 14:32:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 101 states have internal predecessors, (105), 39 states have call successors, (39), 19 states have call predecessors, (39), 19 states have return successors, (39), 35 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-13 14:32:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 183 transitions. [2024-11-13 14:32:56,443 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 183 transitions. Word has length 147 [2024-11-13 14:32:56,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:32:56,444 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 183 transitions. [2024-11-13 14:32:56,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 13 states have call predecessors, (35), 11 states have call successors, (35) [2024-11-13 14:32:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 183 transitions. [2024-11-13 14:32:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-13 14:32:56,446 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:32:56,446 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:32:56,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 14:32:56,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 14:32:56,647 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:32:56,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:32:56,647 INFO L85 PathProgramCache]: Analyzing trace with hash -422548698, now seen corresponding path program 6 times [2024-11-13 14:32:56,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:32:56,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015480259] [2024-11-13 14:32:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:32:56,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:32:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:32:56,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943148521] [2024-11-13 14:32:56,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:32:56,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:32:56,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:32:56,741 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:32:56,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 14:32:57,348 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-13 14:32:57,348 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:32:57,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-13 14:32:57,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:32:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 170 proven. 90 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2024-11-13 14:32:59,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:33:51,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:33:51,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015480259] [2024-11-13 14:33:51,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:33:51,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943148521] [2024-11-13 14:33:51,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943148521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:33:51,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:33:51,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-13 14:33:51,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158272289] [2024-11-13 14:33:51,160 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-13 14:33:51,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 14:33:51,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:33:51,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 14:33:51,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=752, Unknown=6, NotChecked=0, Total=870 [2024-11-13 14:33:51,162 INFO L87 Difference]: Start difference. First operand 156 states and 183 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2024-11-13 14:33:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:33:55,311 INFO L93 Difference]: Finished difference Result 245 states and 293 transitions. [2024-11-13 14:33:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 14:33:55,312 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) Word has length 161 [2024-11-13 14:33:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:33:55,314 INFO L225 Difference]: With dead ends: 245 [2024-11-13 14:33:55,314 INFO L226 Difference]: Without dead ends: 224 [2024-11-13 14:33:55,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=120, Invalid=804, Unknown=6, NotChecked=0, Total=930 [2024-11-13 14:33:55,315 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 12 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:33:55,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 983 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-13 14:33:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-13 14:33:55,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 207. [2024-11-13 14:33:55,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 128 states have (on average 1.0859375) internal successors, (139), 134 states have internal predecessors, (139), 54 states have call successors, (54), 24 states have call predecessors, (54), 24 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2024-11-13 14:33:55,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 247 transitions. [2024-11-13 14:33:55,425 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 247 transitions. Word has length 161 [2024-11-13 14:33:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:33:55,425 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 247 transitions. [2024-11-13 14:33:55,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2024-11-13 14:33:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 247 transitions. [2024-11-13 14:33:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-13 14:33:55,428 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:33:55,428 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:33:55,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-13 14:33:55,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:33:55,629 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:33:55,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:33:55,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2111492440, now seen corresponding path program 1 times [2024-11-13 14:33:55,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:33:55,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135845336] [2024-11-13 14:33:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:33:55,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:33:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:33:55,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986712321] [2024-11-13 14:33:55,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:33:55,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:33:55,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:33:55,694 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:33:55,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 14:33:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:33:55,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-13 14:33:55,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:34:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 45 proven. 155 refuted. 0 times theorem prover too weak. 958 trivial. 0 not checked. [2024-11-13 14:34:00,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:35:16,656 WARN L286 SmtUtils]: Spent 9.27s on a formula simplification that was a NOOP. DAG size: 199 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:36:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 45 proven. 155 refuted. 0 times theorem prover too weak. 958 trivial. 0 not checked. [2024-11-13 14:36:42,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:36:42,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135845336] [2024-11-13 14:36:42,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:36:42,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986712321] [2024-11-13 14:36:42,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986712321] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:36:42,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:36:42,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 35 [2024-11-13 14:36:42,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335981907] [2024-11-13 14:36:42,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:36:42,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-13 14:36:42,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:36:42,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-13 14:36:42,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 14:36:42,025 INFO L87 Difference]: Start difference. First operand 207 states and 247 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 33 states have internal predecessors, (67), 21 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (49), 18 states have call predecessors, (49), 19 states have call successors, (49) [2024-11-13 14:36:57,994 WARN L286 SmtUtils]: Spent 12.56s on a formula simplification. DAG size of input: 466 DAG size of output: 89 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:36:59,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:37:11,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:37:20,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:37:21,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:37:36,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:37:58,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:38:00,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:38:21,078 WARN L286 SmtUtils]: Spent 13.75s on a formula simplification. DAG size of input: 219 DAG size of output: 96 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:38:26,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:38:40,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 14:38:54,945 WARN L286 SmtUtils]: Spent 10.24s on a formula simplification. DAG size of input: 147 DAG size of output: 81 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:38:55,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:38:55,537 INFO L93 Difference]: Finished difference Result 311 states and 389 transitions. [2024-11-13 14:38:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-13 14:38:55,537 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 33 states have internal predecessors, (67), 21 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (49), 18 states have call predecessors, (49), 19 states have call successors, (49) Word has length 161 [2024-11-13 14:38:55,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:38:55,539 INFO L225 Difference]: With dead ends: 311 [2024-11-13 14:38:55,539 INFO L226 Difference]: Without dead ends: 281 [2024-11-13 14:38:55,541 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 130.4s TimeCoverageRelationStatistics Valid=628, Invalid=2678, Unknown=0, NotChecked=0, Total=3306 [2024-11-13 14:38:55,541 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 101 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.9s IncrementalHoareTripleChecker+Time [2024-11-13 14:38:55,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 884 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 27.9s Time] [2024-11-13 14:38:55,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2024-11-13 14:38:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 274. [2024-11-13 14:38:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 168 states have (on average 1.1071428571428572) internal successors, (186), 178 states have internal predecessors, (186), 77 states have call successors, (77), 28 states have call predecessors, (77), 28 states have return successors, (77), 67 states have call predecessors, (77), 77 states have call successors, (77) [2024-11-13 14:38:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 340 transitions. [2024-11-13 14:38:55,736 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 340 transitions. Word has length 161 [2024-11-13 14:38:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:38:55,737 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 340 transitions. [2024-11-13 14:38:55,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 33 states have internal predecessors, (67), 21 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (49), 18 states have call predecessors, (49), 19 states have call successors, (49) [2024-11-13 14:38:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 340 transitions. [2024-11-13 14:38:55,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-11-13 14:38:55,739 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:38:55,739 INFO L215 NwaCegarLoop]: trace histogram [26, 25, 25, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:38:55,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 14:38:55,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:38:55,943 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:38:55,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:38:55,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1746555030, now seen corresponding path program 7 times [2024-11-13 14:38:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:38:55,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484843425] [2024-11-13 14:38:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:38:55,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:38:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,734 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:38:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,737 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:38:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:38:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:38:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-13 14:38:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-13 14:38:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,750 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 14:38:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 14:38:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 14:38:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,759 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-13 14:38:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 14:38:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,765 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-11-13 14:38:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,768 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-13 14:38:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-11-13 14:38:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,774 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-11-13 14:38:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-11-13 14:38:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,780 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-11-13 14:38:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-11-13 14:38:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,787 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-11-13 14:38:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-11-13 14:38:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,795 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-11-13 14:38:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,799 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-11-13 14:38:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,802 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-11-13 14:38:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-11-13 14:38:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2024-11-13 14:38:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2024-11-13 14:38:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,817 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2024-11-13 14:38:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2024-11-13 14:38:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 64 proven. 96 refuted. 0 times theorem prover too weak. 1212 trivial. 0 not checked. [2024-11-13 14:38:56,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:38:56,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484843425] [2024-11-13 14:38:56,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484843425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:38:56,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890243599] [2024-11-13 14:38:56,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 14:38:56,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:38:56,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:38:56,828 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:38:56,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 14:38:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:38:56,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 14:38:56,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:38:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 64 proven. 96 refuted. 0 times theorem prover too weak. 1212 trivial. 0 not checked. [2024-11-13 14:38:57,306 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:38:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 64 proven. 96 refuted. 0 times theorem prover too weak. 1212 trivial. 0 not checked. [2024-11-13 14:38:58,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890243599] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:38:58,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:38:58,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-13 14:38:58,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294024405] [2024-11-13 14:38:58,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:38:58,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 14:38:58,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:38:58,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 14:38:58,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:38:58,944 INFO L87 Difference]: Start difference. First operand 274 states and 340 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 11 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (48), 10 states have call predecessors, (48), 10 states have call successors, (48) [2024-11-13 14:39:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:39:00,094 INFO L93 Difference]: Finished difference Result 317 states and 392 transitions. [2024-11-13 14:39:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 14:39:00,095 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 11 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (48), 10 states have call predecessors, (48), 10 states have call successors, (48) Word has length 174 [2024-11-13 14:39:00,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:39:00,098 INFO L225 Difference]: With dead ends: 317 [2024-11-13 14:39:00,098 INFO L226 Difference]: Without dead ends: 192 [2024-11-13 14:39:00,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 403 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:39:00,100 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 3 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:39:00,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 556 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 14:39:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-13 14:39:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2024-11-13 14:39:00,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 119 states have (on average 1.0756302521008403) internal successors, (128), 125 states have internal predecessors, (128), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-13 14:39:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 224 transitions. [2024-11-13 14:39:00,220 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 224 transitions. Word has length 174 [2024-11-13 14:39:00,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:39:00,220 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 224 transitions. [2024-11-13 14:39:00,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 11 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (48), 10 states have call predecessors, (48), 10 states have call successors, (48) [2024-11-13 14:39:00,221 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 224 transitions. [2024-11-13 14:39:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-11-13 14:39:00,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:39:00,222 INFO L215 NwaCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:39:00,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 14:39:00,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 14:39:00,426 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:39:00,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:39:00,427 INFO L85 PathProgramCache]: Analyzing trace with hash 741678293, now seen corresponding path program 8 times [2024-11-13 14:39:00,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:39:00,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172344749] [2024-11-13 14:39:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:39:00,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:39:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:39:00,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931123075] [2024-11-13 14:39:00,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:39:00,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:39:00,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:39:00,536 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:39:00,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_440b0a05-ed07-42a4-9907-531ad1948aa1/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 14:39:00,699 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:39:00,699 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:39:00,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-13 14:39:00,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:39:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 54 proven. 192 refuted. 0 times theorem prover too weak. 1231 trivial. 0 not checked. [2024-11-13 14:39:06,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:39:50,899 WARN L286 SmtUtils]: Spent 8.81s on a formula simplification that was a NOOP. DAG size: 376 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)