./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/divbin.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/divbin.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC --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 c49641164907d0e2939c5443b0376a8e4377b34a58fd804ad01c6cf7d42c55dc --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 00:12:39,682 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 00:12:39,789 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-24 00:12:39,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 00:12:39,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 00:12:39,849 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 00:12:39,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 00:12:39,852 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 00:12:39,853 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 00:12:39,853 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 00:12:39,855 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 00:12:39,855 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 00:12:39,855 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 00:12:39,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 00:12:39,856 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 00:12:39,857 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 00:12:39,857 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 00:12:39,858 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 00:12:39,858 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 00:12:39,858 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 00:12:39,858 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 00:12:39,858 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 00:12:39,859 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 00:12:39,859 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 00:12:39,859 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 00:12:39,859 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 00:12:39,859 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 00:12:39,859 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 00:12:39,859 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 00:12:39,860 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:12:39,860 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:12:39,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:12:39,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:12:39,860 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 00:12:39,860 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:12:39,860 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:12:39,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:12:39,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:12:39,861 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 00:12:39,861 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 00:12:39,861 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 00:12:39,861 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 00:12:39,862 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 00:12:39,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 00:12:39,863 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 00:12:39,863 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 00:12:39,863 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 00:12:39,863 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 00:12:39,863 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_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC 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 -> c49641164907d0e2939c5443b0376a8e4377b34a58fd804ad01c6cf7d42c55dc [2024-11-24 00:12:40,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 00:12:40,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 00:12:40,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 00:12:40,289 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 00:12:40,290 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 00:12:40,292 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/nla-digbench/divbin.i [2024-11-24 00:12:44,157 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/data/22bc545c0/3a982e1c49504a6aaf83462b5c4e99d4/FLAGae43d75d0 [2024-11-24 00:12:44,493 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 00:12:44,495 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/sv-benchmarks/c/nla-digbench/divbin.i [2024-11-24 00:12:44,504 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/data/22bc545c0/3a982e1c49504a6aaf83462b5c4e99d4/FLAGae43d75d0 [2024-11-24 00:12:44,524 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/data/22bc545c0/3a982e1c49504a6aaf83462b5c4e99d4 [2024-11-24 00:12:44,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 00:12:44,529 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 00:12:44,531 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 00:12:44,531 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 00:12:44,537 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 00:12:44,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,539 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41eb8e36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44, skipping insertion in model container [2024-11-24 00:12:44,540 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,559 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 00:12:44,767 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_517ea05c-5b76-4161-a33b-f991a3649655/sv-benchmarks/c/nla-digbench/divbin.i[950,963] [2024-11-24 00:12:44,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:12:44,805 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 00:12:44,824 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_517ea05c-5b76-4161-a33b-f991a3649655/sv-benchmarks/c/nla-digbench/divbin.i[950,963] [2024-11-24 00:12:44,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:12:44,860 INFO L204 MainTranslator]: Completed translation [2024-11-24 00:12:44,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44 WrapperNode [2024-11-24 00:12:44,861 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 00:12:44,862 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 00:12:44,862 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 00:12:44,862 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 00:12:44,872 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,880 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,900 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2024-11-24 00:12:44,900 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 00:12:44,901 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 00:12:44,901 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 00:12:44,901 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 00:12:44,912 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,913 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,933 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]. [2024-11-24 00:12:44,937 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,938 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,941 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,946 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,958 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,959 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,960 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,962 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 00:12:44,966 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 00:12:44,966 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 00:12:44,966 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 00:12:44,967 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44" (1/1) ... [2024-11-24 00:12:44,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:12:44,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:12:45,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 00:12:45,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 00:12:45,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 00:12:45,058 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-24 00:12:45,058 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-24 00:12:45,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 00:12:45,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 00:12:45,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 00:12:45,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-24 00:12:45,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-24 00:12:45,148 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 00:12:45,150 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 00:12:45,333 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-24 00:12:45,333 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 00:12:45,347 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 00:12:45,349 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-24 00:12:45,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:12:45 BoogieIcfgContainer [2024-11-24 00:12:45,350 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 00:12:45,356 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 00:12:45,356 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 00:12:45,363 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 00:12:45,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:12:44" (1/3) ... [2024-11-24 00:12:45,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4493a501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:12:45, skipping insertion in model container [2024-11-24 00:12:45,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:12:44" (2/3) ... [2024-11-24 00:12:45,364 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4493a501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:12:45, skipping insertion in model container [2024-11-24 00:12:45,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:12:45" (3/3) ... [2024-11-24 00:12:45,366 INFO L128 eAbstractionObserver]: Analyzing ICFG divbin.i [2024-11-24 00:12:45,387 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 00:12:45,389 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG divbin.i that has 3 procedures, 24 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-24 00:12:45,471 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 00:12:45,493 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;@27075276, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 00:12:45,493 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-24 00:12:45,498 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-24 00:12:45,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-24 00:12:45,511 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:12:45,512 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:12:45,513 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:12:45,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:12:45,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1300630107, now seen corresponding path program 1 times [2024-11-24 00:12:45,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:12:45,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131905318] [2024-11-24 00:12:45,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:12:45,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:12:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:12:45,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:12:45,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131905318] [2024-11-24 00:12:45,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131905318] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:12:45,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114997094] [2024-11-24 00:12:45,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:12:45,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:45,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:12:45,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:12:45,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 00:12:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:45,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-24 00:12:45,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:12:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:12:45,877 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:12:45,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114997094] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:12:45,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 00:12:45,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-24 00:12:45,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166384858] [2024-11-24 00:12:45,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:12:45,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-24 00:12:45,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:12:45,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-24 00:12:45,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-24 00:12:45,921 INFO L87 Difference]: Start difference. First operand has 24 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:12:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:12:45,952 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2024-11-24 00:12:45,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-24 00:12:45,957 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-11-24 00:12:45,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:12:45,967 INFO L225 Difference]: With dead ends: 45 [2024-11-24 00:12:45,967 INFO L226 Difference]: Without dead ends: 20 [2024-11-24 00:12:45,975 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-24 00:12:45,978 INFO L435 NwaCegarLoop]: 28 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, 28 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 [2024-11-24 00:12:45,980 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:12:45,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-24 00:12:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-24 00:12:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-24 00:12:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-11-24 00:12:46,025 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 18 [2024-11-24 00:12:46,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:12:46,025 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-11-24 00:12:46,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:12:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-11-24 00:12:46,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-24 00:12:46,029 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:12:46,029 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:12:46,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-24 00:12:46,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-24 00:12:46,234 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:12:46,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:12:46,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1631688987, now seen corresponding path program 1 times [2024-11-24 00:12:46,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:12:46,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049682813] [2024-11-24 00:12:46,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:12:46,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:12:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 00:12:46,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760137965] [2024-11-24 00:12:46,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:12:46,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:46,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:12:46,332 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:12:46,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 00:12:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:46,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-24 00:12:46,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:12:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:12:46,568 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:12:46,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:12:46,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049682813] [2024-11-24 00:12:46,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 00:12:46,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760137965] [2024-11-24 00:12:46,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760137965] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:12:46,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:12:46,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:12:46,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656710550] [2024-11-24 00:12:46,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:12:46,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:12:46,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:12:46,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:12:46,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:12:46,572 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:12:46,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:12:46,682 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2024-11-24 00:12:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:12:46,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-11-24 00:12:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:12:46,685 INFO L225 Difference]: With dead ends: 30 [2024-11-24 00:12:46,685 INFO L226 Difference]: Without dead ends: 27 [2024-11-24 00:12:46,685 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:12:46,688 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:12:46,688 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 61 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:12:46,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-24 00:12:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-24 00:12:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-24 00:12:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-11-24 00:12:46,705 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 18 [2024-11-24 00:12:46,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:12:46,706 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-11-24 00:12:46,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:12:46,706 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-11-24 00:12:46,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-24 00:12:46,707 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:12:46,707 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:12:46,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-24 00:12:46,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:46,915 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:12:46,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:12:46,915 INFO L85 PathProgramCache]: Analyzing trace with hash -765284006, now seen corresponding path program 1 times [2024-11-24 00:12:46,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:12:46,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185706474] [2024-11-24 00:12:46,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:12:46,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:12:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:12:47,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:12:47,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185706474] [2024-11-24 00:12:47,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185706474] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:12:47,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:12:47,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:12:47,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051512154] [2024-11-24 00:12:47,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:12:47,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:12:47,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:12:47,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:12:47,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:12:47,526 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-24 00:12:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:12:47,574 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2024-11-24 00:12:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:12:47,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-11-24 00:12:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:12:47,576 INFO L225 Difference]: With dead ends: 47 [2024-11-24 00:12:47,577 INFO L226 Difference]: Without dead ends: 28 [2024-11-24 00:12:47,578 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:12:47,579 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:12:47,581 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:12:47,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-24 00:12:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-24 00:12:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-24 00:12:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-24 00:12:47,595 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 25 [2024-11-24 00:12:47,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:12:47,596 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-24 00:12:47,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-24 00:12:47,596 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-24 00:12:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-24 00:12:47,598 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:12:47,599 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:12:47,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-24 00:12:47,599 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:12:47,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:12:47,600 INFO L85 PathProgramCache]: Analyzing trace with hash 796290032, now seen corresponding path program 1 times [2024-11-24 00:12:47,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:12:47,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474806788] [2024-11-24 00:12:47,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:12:47,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:12:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 00:12:47,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974487548] [2024-11-24 00:12:47,697 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:12:47,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:47,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:12:47,700 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:12:47,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 00:12:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:47,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-24 00:12:47,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:12:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:12:48,087 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:13:05,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:13:05,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474806788] [2024-11-24 00:13:05,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 00:13:05,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974487548] [2024-11-24 00:13:05,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974487548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:13:05,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-24 00:13:05,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-24 00:13:05,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892644860] [2024-11-24 00:13:05,717 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-24 00:13:05,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 00:13:05,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:13:05,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 00:13:05,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=122, Unknown=3, NotChecked=0, Total=156 [2024-11-24 00:13:05,719 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-24 00:13:05,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:13:05,995 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-11-24 00:13:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:13:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-11-24 00:13:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:13:05,998 INFO L225 Difference]: With dead ends: 37 [2024-11-24 00:13:05,999 INFO L226 Difference]: Without dead ends: 34 [2024-11-24 00:13:06,000 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=37, Invalid=142, Unknown=3, NotChecked=0, Total=182 [2024-11-24 00:13:06,003 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:13:06,004 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 92 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:13:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-24 00:13:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-24 00:13:06,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-24 00:13:06,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-11-24 00:13:06,021 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 26 [2024-11-24 00:13:06,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:13:06,022 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-11-24 00:13:06,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-24 00:13:06,022 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-11-24 00:13:06,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-24 00:13:06,025 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:13:06,025 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:13:06,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 00:13:06,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:13:06,230 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:13:06,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:13:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1597503983, now seen corresponding path program 2 times [2024-11-24 00:13:06,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:13:06,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215487538] [2024-11-24 00:13:06,232 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:13:06,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:13:06,365 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:13:06,365 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:13:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:13:07,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:13:07,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215487538] [2024-11-24 00:13:07,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215487538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:13:07,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110775280] [2024-11-24 00:13:07,750 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:13:07,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:13:07,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:13:07,754 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:13:07,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 00:13:07,898 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:13:07,898 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:13:07,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-24 00:13:07,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:13:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:13:08,946 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:13:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:13:09,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110775280] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:13:09,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:13:09,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 7] total 20 [2024-11-24 00:13:09,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051778392] [2024-11-24 00:13:09,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:13:09,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-24 00:13:09,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:13:09,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-24 00:13:09,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2024-11-24 00:13:09,763 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 18 states have internal predecessors, (32), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-24 00:13:10,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:13:10,379 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-11-24 00:13:10,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 00:13:10,380 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 18 states have internal predecessors, (32), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 33 [2024-11-24 00:13:10,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:13:10,381 INFO L225 Difference]: With dead ends: 65 [2024-11-24 00:13:10,381 INFO L226 Difference]: Without dead ends: 37 [2024-11-24 00:13:10,382 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2024-11-24 00:13:10,383 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-24 00:13:10,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 135 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-24 00:13:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-24 00:13:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-11-24 00:13:10,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-24 00:13:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-11-24 00:13:10,393 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 33 [2024-11-24 00:13:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:13:10,393 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-11-24 00:13:10,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 18 states have internal predecessors, (32), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-24 00:13:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-11-24 00:13:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-24 00:13:10,395 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:13:10,395 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:13:10,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 00:13:10,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:13:10,600 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:13:10,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:13:10,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1844789627, now seen corresponding path program 3 times [2024-11-24 00:13:10,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:13:10,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323386089] [2024-11-24 00:13:10,601 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:13:10,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:13:10,740 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-24 00:13:10,740 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-24 00:13:10,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737265679] [2024-11-24 00:13:10,743 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:13:10,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:13:10,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:13:10,746 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:13:10,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_517ea05c-5b76-4161-a33b-f991a3649655/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 00:13:11,230 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-24 00:13:11,231 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:13:11,232 WARN L254 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-24 00:13:11,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:14:01,716 WARN L286 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:14:26,754 WARN L286 SmtUtils]: Spent 6.47s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:14:52,993 WARN L286 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:15:11,257 WARN L286 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:15:18,058 WARN L286 SmtUtils]: Spent 6.77s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:15:26,187 WARN L286 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:15:46,836 WARN L286 SmtUtils]: Spent 8.19s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:15:58,192 WARN L286 SmtUtils]: Spent 6.85s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:16:05,664 WARN L286 SmtUtils]: Spent 7.47s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:16:25,401 WARN L286 SmtUtils]: Spent 7.93s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:16:56,515 WARN L286 SmtUtils]: Spent 12.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:17:05,119 WARN L286 SmtUtils]: Spent 8.17s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:17:18,021 WARN L286 SmtUtils]: Spent 8.81s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:17:28,916 WARN L286 SmtUtils]: Spent 5.28s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:17:37,360 WARN L286 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:17:42,612 WARN L286 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 22 DAG size of output: 1 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:17:53,648 WARN L286 SmtUtils]: Spent 10.37s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:17:59,661 WARN L286 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:18:05,154 WARN L286 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:18:18,487 WARN L286 SmtUtils]: Spent 8.53s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:18:36,346 WARN L286 SmtUtils]: Spent 12.04s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:18:47,531 WARN L286 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:18:53,876 WARN L286 SmtUtils]: Spent 6.34s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:19:33,178 WARN L286 SmtUtils]: Spent 12.57s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:19:39,223 WARN L286 SmtUtils]: Spent 5.51s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:19:45,166 WARN L286 SmtUtils]: Spent 5.94s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:20:01,209 WARN L286 SmtUtils]: Spent 16.04s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:20:12,627 WARN L286 SmtUtils]: Spent 7.05s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:20:36,248 WARN L286 SmtUtils]: Spent 16.07s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:20:48,934 WARN L286 SmtUtils]: Spent 8.56s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:21:02,186 WARN L286 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:21:28,157 WARN L286 SmtUtils]: Spent 12.64s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:21:44,281 WARN L286 SmtUtils]: Spent 12.07s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:21:53,748 WARN L286 SmtUtils]: Spent 9.47s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:22:36,435 WARN L286 SmtUtils]: Spent 5.27s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:22:49,309 WARN L286 SmtUtils]: Spent 11.87s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:23:00,403 WARN L286 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:23:08,998 WARN L286 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:23:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:23:09,353 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:24:10,703 WARN L286 SmtUtils]: Spent 16.05s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:24:30,806 WARN L286 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:24:50,858 WARN L286 SmtUtils]: Spent 20.05s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:25:10,919 WARN L286 SmtUtils]: Spent 16.04s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 00:25:14,936 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824)) (.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (= .cse0 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* .cse1 4 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) (< (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* .cse1 4294967294)) 4294967296) .cse1) (= (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296) (* 2 .cse1)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~b~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse0)) (< (* .cse1 4) (+ .cse2 1)) (< .cse2 (* 2 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648))))) is different from true [2024-11-24 00:25:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 2 not checked. [2024-11-24 00:25:14,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:25:14,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323386089] [2024-11-24 00:25:14,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 00:25:14,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737265679] [2024-11-24 00:25:14,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737265679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:25:14,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:25:14,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 29 [2024-11-24 00:25:14,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662506134] [2024-11-24 00:25:14,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 00:25:14,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-24 00:25:14,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:25:14,982 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-24 00:25:14,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=626, Unknown=6, NotChecked=52, Total=812 [2024-11-24 00:25:14,983 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 29 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-24 00:25:19,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-24 00:26:35,026 WARN L286 SmtUtils]: Spent 1.19m on a formula simplification. DAG size of input: 77 DAG size of output: 56 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:26:39,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-24 00:26:44,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-24 00:26:48,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-24 00:27:16,794 WARN L286 SmtUtils]: Spent 18.31s on a formula simplification. DAG size of input: 75 DAG size of output: 54 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:27:21,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-24 00:27:39,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-24 00:27:43,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-24 00:27:54,384 WARN L286 SmtUtils]: Spent 7.31s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:27:58,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []