./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB --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 1619c1c02ba7c9b660af32e6427e3b3d5cd6ca3ff286b9db386918ae0c8b508c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:23:20,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:23:20,187 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 23:23:20,193 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:23:20,193 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:23:20,219 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:23:20,220 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:23:20,220 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:23:20,220 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:23:20,220 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:23:20,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:23:20,221 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:23:20,221 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:23:20,221 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:23:20,221 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:23:20,222 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:23:20,222 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 23:23:20,222 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:23:20,222 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:23:20,222 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:23:20,222 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:23:20,223 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 23:23:20,226 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:23:20,227 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 23:23:20,227 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:23:20,227 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:23:20,227 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:23:20,227 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:23:20,227 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:23:20,228 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:23:20,228 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:23:20,228 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:23:20,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:23:20,228 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:23:20,228 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:23:20,228 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:23:20,229 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:23:20,229 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:23:20,229 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:23:20,229 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:23:20,229 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 23:23:20,229 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 23:23:20,229 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:23:20,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:23:20,230 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:23:20,230 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:23:20,230 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:23:20,230 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:23:20,230 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_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 1619c1c02ba7c9b660af32e6427e3b3d5cd6ca3ff286b9db386918ae0c8b508c [2024-11-27 23:23:20,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:23:20,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:23:20,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:23:20,544 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:23:20,544 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:23:20,546 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c [2024-11-27 23:23:23,690 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/data/a7afe44b3/880d547df39f4a71b16089bf240097a6/FLAGb1c5715f3 [2024-11-27 23:23:24,027 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:23:24,028 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c [2024-11-27 23:23:24,050 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/data/a7afe44b3/880d547df39f4a71b16089bf240097a6/FLAGb1c5715f3 [2024-11-27 23:23:24,090 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/data/a7afe44b3/880d547df39f4a71b16089bf240097a6 [2024-11-27 23:23:24,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:23:24,096 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:23:24,098 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:23:24,098 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:23:24,104 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:23:24,105 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,108 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f4df9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24, skipping insertion in model container [2024-11-27 23:23:24,108 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,129 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:23:24,347 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_672f7ab2-7894-437a-a0f9-68c9980b43bb/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c[526,539] [2024-11-27 23:23:24,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:23:24,395 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:23:24,413 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_672f7ab2-7894-437a-a0f9-68c9980b43bb/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c[526,539] [2024-11-27 23:23:24,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:23:24,443 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:23:24,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24 WrapperNode [2024-11-27 23:23:24,444 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:23:24,446 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:23:24,446 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:23:24,446 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:23:24,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,466 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,488 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2024-11-27 23:23:24,489 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:23:24,491 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:23:24,492 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:23:24,492 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:23:24,503 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,508 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,531 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-11-27 23:23:24,531 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,531 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,537 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,539 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,547 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,548 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,549 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,555 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:23:24,556 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:23:24,556 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:23:24,557 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:23:24,558 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24" (1/1) ... [2024-11-27 23:23:24,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:23:24,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:24,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:23:24,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:23:24,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:23:24,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:23:24,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 23:23:24,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:23:24,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:23:24,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 23:23:24,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 23:23:24,709 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:23:24,711 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:23:24,856 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-27 23:23:24,856 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:23:24,867 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:23:24,868 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 23:23:24,868 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:23:24 BoogieIcfgContainer [2024-11-27 23:23:24,868 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:23:24,871 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:23:24,872 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:23:24,876 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:23:24,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:23:24" (1/3) ... [2024-11-27 23:23:24,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@774ea989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:23:24, skipping insertion in model container [2024-11-27 23:23:24,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:24" (2/3) ... [2024-11-27 23:23:24,878 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@774ea989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:23:24, skipping insertion in model container [2024-11-27 23:23:24,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:23:24" (3/3) ... [2024-11-27 23:23:24,879 INFO L128 eAbstractionObserver]: Analyzing ICFG hard2_valuebound20.c [2024-11-27 23:23:24,896 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:23:24,898 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hard2_valuebound20.c that has 2 procedures, 24 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-27 23:23:24,958 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:23:24,971 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;@681717b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:23:24,972 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 23:23:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 23:23:24,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-27 23:23:24,984 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:24,985 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:24,985 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:24,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash 121123614, now seen corresponding path program 1 times [2024-11-27 23:23:25,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:25,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748209949] [2024-11-27 23:23:25,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:25,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:25,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:25,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748209949] [2024-11-27 23:23:25,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748209949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:25,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:25,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:23:25,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733712132] [2024-11-27 23:23:25,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:25,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 23:23:25,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:25,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 23:23:25,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 23:23:25,230 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:25,254 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2024-11-27 23:23:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 23:23:25,255 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-27 23:23:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:25,263 INFO L225 Difference]: With dead ends: 45 [2024-11-27 23:23:25,263 INFO L226 Difference]: Without dead ends: 20 [2024-11-27 23:23:25,268 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 23:23:25,274 INFO L435 NwaCegarLoop]: 32 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, 32 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 [2024-11-27 23:23:25,275 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:23:25,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-27 23:23:25,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-27 23:23:25,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:23:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2024-11-27 23:23:25,313 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 8 [2024-11-27 23:23:25,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:25,314 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2024-11-27 23:23:25,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2024-11-27 23:23:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-27 23:23:25,316 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:25,316 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:25,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:23:25,317 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:25,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:25,319 INFO L85 PathProgramCache]: Analyzing trace with hash 178381916, now seen corresponding path program 1 times [2024-11-27 23:23:25,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:25,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153156224] [2024-11-27 23:23:25,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:25,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:25,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:25,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153156224] [2024-11-27 23:23:25,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153156224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:25,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:25,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:23:25,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963078832] [2024-11-27 23:23:25,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:25,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:23:25,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:25,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:23:25,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:23:25,533 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:25,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:25,633 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2024-11-27 23:23:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:23:25,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-27 23:23:25,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:25,636 INFO L225 Difference]: With dead ends: 32 [2024-11-27 23:23:25,636 INFO L226 Difference]: Without dead ends: 30 [2024-11-27 23:23:25,636 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:23:25,637 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 83 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 [2024-11-27 23:23:25,637 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 83 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:23:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-27 23:23:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2024-11-27 23:23:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:23:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-11-27 23:23:25,645 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 8 [2024-11-27 23:23:25,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:25,645 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-11-27 23:23:25,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:25,646 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-11-27 23:23:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-27 23:23:25,646 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:25,646 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:25,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:23:25,647 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:25,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:25,647 INFO L85 PathProgramCache]: Analyzing trace with hash 887975295, now seen corresponding path program 1 times [2024-11-27 23:23:25,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:25,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500513407] [2024-11-27 23:23:25,647 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:25,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:25,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:25,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500513407] [2024-11-27 23:23:25,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500513407] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:25,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:25,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:23:25,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505646874] [2024-11-27 23:23:25,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:25,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:23:25,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:25,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:23:25,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:23:25,841 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:23:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:25,927 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2024-11-27 23:23:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:23:25,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-27 23:23:25,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:25,930 INFO L225 Difference]: With dead ends: 36 [2024-11-27 23:23:25,930 INFO L226 Difference]: Without dead ends: 34 [2024-11-27 23:23:25,930 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:23:25,931 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 80 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 [2024-11-27 23:23:25,931 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 80 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:23:25,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-27 23:23:25,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2024-11-27 23:23:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:23:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-11-27 23:23:25,939 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2024-11-27 23:23:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:25,940 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-11-27 23:23:25,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:23:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-11-27 23:23:25,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-27 23:23:25,940 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:25,940 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:25,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 23:23:25,941 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:25,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:25,941 INFO L85 PathProgramCache]: Analyzing trace with hash -985253380, now seen corresponding path program 1 times [2024-11-27 23:23:25,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:25,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071619435] [2024-11-27 23:23:25,942 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:25,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:23:25,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311125805] [2024-11-27 23:23:25,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:25,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:25,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:25,973 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:25,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:23:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:26,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:23:26,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 23:23:26,233 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:23:26,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:26,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071619435] [2024-11-27 23:23:26,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:23:26,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311125805] [2024-11-27 23:23:26,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311125805] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:26,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:26,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:23:26,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82090473] [2024-11-27 23:23:26,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:26,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:23:26,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:26,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:23:26,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:23:26,236 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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) [2024-11-27 23:23:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:26,339 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2024-11-27 23:23:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:23:26,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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 [2024-11-27 23:23:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:26,340 INFO L225 Difference]: With dead ends: 51 [2024-11-27 23:23:26,340 INFO L226 Difference]: Without dead ends: 39 [2024-11-27 23:23:26,341 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 [2024-11-27 23:23:26,341 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:26,342 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:23:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-27 23:23:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-27 23:23:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-27 23:23:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2024-11-27 23:23:26,359 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 18 [2024-11-27 23:23:26,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:26,360 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2024-11-27 23:23:26,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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) [2024-11-27 23:23:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2024-11-27 23:23:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-27 23:23:26,360 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:26,360 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:26,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 23:23:26,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:26,561 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:26,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:26,562 INFO L85 PathProgramCache]: Analyzing trace with hash 506235226, now seen corresponding path program 1 times [2024-11-27 23:23:26,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:26,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326556499] [2024-11-27 23:23:26,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:26,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:23:26,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272653357] [2024-11-27 23:23:26,591 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:26,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:26,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:26,593 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:26,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:23:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:26,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 23:23:26,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:23:26,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:23:26,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:26,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326556499] [2024-11-27 23:23:26,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:23:26,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272653357] [2024-11-27 23:23:26,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272653357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:26,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:23:26,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-27 23:23:26,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696360216] [2024-11-27 23:23:26,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:26,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:23:26,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:26,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:23:26,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:23:26,986 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 23:23:27,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:27,120 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2024-11-27 23:23:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:23:27,121 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2024-11-27 23:23:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:27,122 INFO L225 Difference]: With dead ends: 51 [2024-11-27 23:23:27,122 INFO L226 Difference]: Without dead ends: 49 [2024-11-27 23:23:27,123 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:23:27,123 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:27,124 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 74 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:23:27,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-27 23:23:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-11-27 23:23:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-27 23:23:27,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2024-11-27 23:23:27,135 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 24 [2024-11-27 23:23:27,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:27,136 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2024-11-27 23:23:27,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 23:23:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2024-11-27 23:23:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-27 23:23:27,137 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:27,137 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:27,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:27,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:27,339 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:27,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:27,339 INFO L85 PathProgramCache]: Analyzing trace with hash 440489026, now seen corresponding path program 1 times [2024-11-27 23:23:27,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:27,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870887412] [2024-11-27 23:23:27,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:27,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:23:27,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598583671] [2024-11-27 23:23:27,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:27,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:27,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:27,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:27,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:23:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:27,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 23:23:27,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-27 23:23:27,549 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-27 23:23:27,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:27,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870887412] [2024-11-27 23:23:27,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:23:27,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598583671] [2024-11-27 23:23:27,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598583671] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:27,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:23:27,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-27 23:23:27,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146850158] [2024-11-27 23:23:27,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:27,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:23:27,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:27,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:23:27,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:23:27,694 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 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) [2024-11-27 23:23:28,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:28,523 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2024-11-27 23:23:28,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:23:28,524 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), 1 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 34 [2024-11-27 23:23:28,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:28,527 INFO L225 Difference]: With dead ends: 57 [2024-11-27 23:23:28,527 INFO L226 Difference]: Without dead ends: 55 [2024-11-27 23:23:28,527 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:23:28,528 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:28,531 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 75 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-27 23:23:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-27 23:23:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-11-27 23:23:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-27 23:23:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-11-27 23:23:28,565 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 34 [2024-11-27 23:23:28,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:28,566 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-27 23:23:28,566 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), 1 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) [2024-11-27 23:23:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2024-11-27 23:23:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-27 23:23:28,570 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:28,570 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:28,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:28,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-27 23:23:28,771 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:28,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:28,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1768038797, now seen corresponding path program 1 times [2024-11-27 23:23:28,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:28,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874165762] [2024-11-27 23:23:28,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:28,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-27 23:23:28,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:28,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874165762] [2024-11-27 23:23:28,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874165762] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:28,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:28,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:23:28,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397109569] [2024-11-27 23:23:28,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:28,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:23:28,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:28,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:23:28,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:23:28,997 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-27 23:23:29,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:29,083 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2024-11-27 23:23:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:23:29,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2024-11-27 23:23:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:29,086 INFO L225 Difference]: With dead ends: 62 [2024-11-27 23:23:29,087 INFO L226 Difference]: Without dead ends: 51 [2024-11-27 23:23:29,088 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:23:29,088 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:29,091 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 91 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:23:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-27 23:23:29,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-27 23:23:29,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-27 23:23:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2024-11-27 23:23:29,110 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 40 [2024-11-27 23:23:29,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:29,111 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2024-11-27 23:23:29,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-27 23:23:29,112 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2024-11-27 23:23:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-27 23:23:29,115 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:29,115 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:29,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 23:23:29,115 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:29,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:29,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1586990777, now seen corresponding path program 1 times [2024-11-27 23:23:29,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:29,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683134446] [2024-11-27 23:23:29,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:29,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:23:29,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759589224] [2024-11-27 23:23:29,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:29,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:29,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:29,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:29,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:23:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:29,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-27 23:23:29,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-27 23:23:29,762 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-27 23:23:31,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:31,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683134446] [2024-11-27 23:23:31,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:23:31,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759589224] [2024-11-27 23:23:31,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759589224] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:31,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:23:31,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-27 23:23:31,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083529363] [2024-11-27 23:23:31,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:31,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:23:31,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:31,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:23:31,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:23:31,655 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-27 23:23:32,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:32,680 INFO L93 Difference]: Finished difference Result 116 states and 161 transitions. [2024-11-27 23:23:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:23:32,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 52 [2024-11-27 23:23:32,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:32,683 INFO L225 Difference]: With dead ends: 116 [2024-11-27 23:23:32,683 INFO L226 Difference]: Without dead ends: 95 [2024-11-27 23:23:32,684 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-27 23:23:32,684 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:32,685 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 147 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 23:23:32,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-27 23:23:32,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2024-11-27 23:23:32,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 56 states have internal predecessors, (65), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-27 23:23:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 126 transitions. [2024-11-27 23:23:32,723 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 126 transitions. Word has length 52 [2024-11-27 23:23:32,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:32,723 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 126 transitions. [2024-11-27 23:23:32,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-27 23:23:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 126 transitions. [2024-11-27 23:23:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-27 23:23:32,725 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:32,725 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:32,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:32,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:32,927 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:32,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:32,927 INFO L85 PathProgramCache]: Analyzing trace with hash -351786085, now seen corresponding path program 1 times [2024-11-27 23:23:32,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:32,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651283170] [2024-11-27 23:23:32,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:32,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:23:32,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796057407] [2024-11-27 23:23:32,983 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:32,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:32,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:32,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:32,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:23:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:33,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-27 23:23:33,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-27 23:23:33,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-27 23:23:34,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:34,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651283170] [2024-11-27 23:23:34,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:23:34,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796057407] [2024-11-27 23:23:34,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796057407] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:34,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:23:34,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-11-27 23:23:34,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999113732] [2024-11-27 23:23:34,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:34,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 23:23:34,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:34,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 23:23:34,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:23:34,010 INFO L87 Difference]: Start difference. First operand 93 states and 126 transitions. Second operand has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-27 23:23:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:34,733 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2024-11-27 23:23:34,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:23:34,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 63 [2024-11-27 23:23:34,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:34,736 INFO L225 Difference]: With dead ends: 142 [2024-11-27 23:23:34,736 INFO L226 Difference]: Without dead ends: 115 [2024-11-27 23:23:34,737 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-11-27 23:23:34,737 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:34,737 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 155 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 23:23:34,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-27 23:23:34,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2024-11-27 23:23:34,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 56 states have internal predecessors, (62), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-27 23:23:34,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2024-11-27 23:23:34,770 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 63 [2024-11-27 23:23:34,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:34,771 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2024-11-27 23:23:34,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-27 23:23:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2024-11-27 23:23:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-27 23:23:34,773 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:34,773 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:34,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:34,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:34,975 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:34,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:34,975 INFO L85 PathProgramCache]: Analyzing trace with hash 946752608, now seen corresponding path program 1 times [2024-11-27 23:23:34,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:34,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954686474] [2024-11-27 23:23:34,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:34,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-27 23:23:35,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:35,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954686474] [2024-11-27 23:23:35,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954686474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:35,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486574700] [2024-11-27 23:23:35,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:35,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:35,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:35,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:35,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:23:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:35,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 23:23:35,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-27 23:23:35,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-27 23:23:36,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486574700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:36,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:23:36,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-27 23:23:36,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177847704] [2024-11-27 23:23:36,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:36,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:23:36,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:36,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:23:36,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:23:36,319 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-27 23:23:36,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:36,602 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2024-11-27 23:23:36,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:23:36,603 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 68 [2024-11-27 23:23:36,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:36,605 INFO L225 Difference]: With dead ends: 110 [2024-11-27 23:23:36,605 INFO L226 Difference]: Without dead ends: 84 [2024-11-27 23:23:36,606 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:23:36,607 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:36,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 201 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:23:36,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-27 23:23:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-27 23:23:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 52 states have internal predecessors, (56), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-27 23:23:36,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-11-27 23:23:36,634 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 68 [2024-11-27 23:23:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:36,635 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-11-27 23:23:36,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-27 23:23:36,635 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-11-27 23:23:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-27 23:23:36,640 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:36,640 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:36,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:36,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 23:23:36,845 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:36,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:36,845 INFO L85 PathProgramCache]: Analyzing trace with hash -728524620, now seen corresponding path program 2 times [2024-11-27 23:23:36,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:36,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407815149] [2024-11-27 23:23:36,846 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:23:36,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:36,895 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:23:36,895 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:23:36,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564151802] [2024-11-27 23:23:36,897 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:23:36,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:36,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:36,900 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:36,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:23:36,987 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:23:36,987 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:36,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-27 23:23:37,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-27 23:23:37,501 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-27 23:23:49,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:49,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407815149] [2024-11-27 23:23:49,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:23:49,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564151802] [2024-11-27 23:23:49,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564151802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:49,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:23:49,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-11-27 23:23:49,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482087265] [2024-11-27 23:23:49,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:49,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 23:23:49,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:49,515 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 23:23:49,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:23:49,516 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 21 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-27 23:23:59,912 WARN L286 SmtUtils]: Spent 10.02s on a formula simplification. DAG size of input: 168 DAG size of output: 82 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:24:03,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:24:03,974 INFO L93 Difference]: Finished difference Result 172 states and 235 transitions. [2024-11-27 23:24:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-27 23:24:03,974 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 80 [2024-11-27 23:24:03,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:24:03,976 INFO L225 Difference]: With dead ends: 172 [2024-11-27 23:24:03,976 INFO L226 Difference]: Without dead ends: 142 [2024-11-27 23:24:03,977 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2024-11-27 23:24:03,978 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 127 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:24:03,978 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 283 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 482 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2024-11-27 23:24:03,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-27 23:24:04,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2024-11-27 23:24:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 82 states have internal predecessors, (92), 49 states have call successors, (49), 14 states have call predecessors, (49), 14 states have return successors, (48), 41 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-27 23:24:04,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 189 transitions. [2024-11-27 23:24:04,043 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 189 transitions. Word has length 80 [2024-11-27 23:24:04,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:24:04,043 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 189 transitions. [2024-11-27 23:24:04,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-27 23:24:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 189 transitions. [2024-11-27 23:24:04,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-27 23:24:04,046 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:24:04,046 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:24:04,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 23:24:04,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 23:24:04,250 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:24:04,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:24:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash -170783218, now seen corresponding path program 2 times [2024-11-27 23:24:04,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:24:04,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568000816] [2024-11-27 23:24:04,250 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:24:04,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:24:04,285 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:24:04,285 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:24:04,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893960499] [2024-11-27 23:24:04,286 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:24:04,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:04,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:24:04,288 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:24:04,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:24:04,376 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:24:04,376 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:04,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-27 23:24:04,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 50 proven. 44 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-27 23:24:04,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:24:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 50 proven. 44 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-27 23:24:06,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:06,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568000816] [2024-11-27 23:24:06,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:24:06,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893960499] [2024-11-27 23:24:06,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893960499] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:24:06,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:24:06,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-11-27 23:24:06,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045241731] [2024-11-27 23:24:06,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:24:06,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-27 23:24:06,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:06,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-27 23:24:06,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2024-11-27 23:24:06,964 INFO L87 Difference]: Start difference. First operand 138 states and 189 transitions. Second operand has 27 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-11-27 23:24:12,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:24:12,468 INFO L93 Difference]: Finished difference Result 209 states and 295 transitions. [2024-11-27 23:24:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-27 23:24:12,469 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 91 [2024-11-27 23:24:12,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:24:12,471 INFO L225 Difference]: With dead ends: 209 [2024-11-27 23:24:12,471 INFO L226 Difference]: Without dead ends: 172 [2024-11-27 23:24:12,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2024-11-27 23:24:12,473 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:24:12,473 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 214 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-27 23:24:12,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-27 23:24:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2024-11-27 23:24:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 85 states have internal predecessors, (96), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (48), 41 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-27 23:24:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 193 transitions. [2024-11-27 23:24:12,558 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 193 transitions. Word has length 91 [2024-11-27 23:24:12,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:24:12,558 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 193 transitions. [2024-11-27 23:24:12,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-11-27 23:24:12,559 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 193 transitions. [2024-11-27 23:24:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-27 23:24:12,560 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:24:12,560 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:24:12,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 23:24:12,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 23:24:12,765 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:24:12,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:24:12,765 INFO L85 PathProgramCache]: Analyzing trace with hash -289474099, now seen corresponding path program 2 times [2024-11-27 23:24:12,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:24:12,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355435819] [2024-11-27 23:24:12,765 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:24:12,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:24:12,820 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:24:12,820 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-27 23:24:13,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:13,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355435819] [2024-11-27 23:24:13,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355435819] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:24:13,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118402120] [2024-11-27 23:24:13,438 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:24:13,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:13,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:24:13,440 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:24:13,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:24:13,507 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:24:13,507 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:13,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-27 23:24:13,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-27 23:24:13,823 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:24:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-27 23:24:14,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118402120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:24:14,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:24:14,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 19 [2024-11-27 23:24:14,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556812790] [2024-11-27 23:24:14,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:24:14,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 23:24:14,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:14,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 23:24:14,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-11-27 23:24:14,854 INFO L87 Difference]: Start difference. First operand 142 states and 193 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 13 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2024-11-27 23:24:15,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:24:15,358 INFO L93 Difference]: Finished difference Result 200 states and 264 transitions. [2024-11-27 23:24:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:24:15,359 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 13 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) Word has length 96 [2024-11-27 23:24:15,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:24:15,360 INFO L225 Difference]: With dead ends: 200 [2024-11-27 23:24:15,360 INFO L226 Difference]: Without dead ends: 117 [2024-11-27 23:24:15,360 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 179 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2024-11-27 23:24:15,361 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 17 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:24:15,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 240 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:24:15,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-27 23:24:15,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-11-27 23:24:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 72 states have internal predecessors, (77), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-27 23:24:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2024-11-27 23:24:15,411 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 96 [2024-11-27 23:24:15,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:24:15,412 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2024-11-27 23:24:15,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 13 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2024-11-27 23:24:15,412 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2024-11-27 23:24:15,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-27 23:24:15,414 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:24:15,414 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:24:15,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 23:24:15,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:15,614 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:24:15,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:24:15,615 INFO L85 PathProgramCache]: Analyzing trace with hash -628355514, now seen corresponding path program 1 times [2024-11-27 23:24:15,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:24:15,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944524019] [2024-11-27 23:24:15,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:24:15,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:24:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:24:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 48 proven. 22 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-27 23:24:15,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:15,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944524019] [2024-11-27 23:24:15,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944524019] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:24:15,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487659966] [2024-11-27 23:24:15,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:24:15,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:15,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:24:15,890 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:24:15,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:24:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:24:15,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:24:15,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 60 proven. 10 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-27 23:24:16,032 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:24:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 60 proven. 10 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-27 23:24:16,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487659966] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:24:16,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:24:16,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2024-11-27 23:24:16,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365495970] [2024-11-27 23:24:16,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:24:16,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 23:24:16,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:16,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 23:24:16,248 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:24:16,248 INFO L87 Difference]: Start difference. First operand 117 states and 143 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2024-11-27 23:24:16,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:24:16,398 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2024-11-27 23:24:16,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:24:16,399 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 107 [2024-11-27 23:24:16,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:24:16,400 INFO L225 Difference]: With dead ends: 123 [2024-11-27 23:24:16,400 INFO L226 Difference]: Without dead ends: 116 [2024-11-27 23:24:16,401 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:24:16,401 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:24:16,401 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 120 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:24:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-27 23:24:16,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2024-11-27 23:24:16,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 70 states have internal predecessors, (75), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-27 23:24:16,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2024-11-27 23:24:16,466 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 107 [2024-11-27 23:24:16,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:24:16,466 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2024-11-27 23:24:16,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2024-11-27 23:24:16,466 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2024-11-27 23:24:16,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-27 23:24:16,467 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:24:16,467 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:24:16,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 23:24:16,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:16,668 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:24:16,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:24:16,669 INFO L85 PathProgramCache]: Analyzing trace with hash -684441695, now seen corresponding path program 3 times [2024-11-27 23:24:16,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:24:16,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345334638] [2024-11-27 23:24:16,669 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:24:16,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:24:16,744 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-27 23:24:16,744 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:24:16,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397082053] [2024-11-27 23:24:16,746 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:24:16,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:16,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:24:16,748 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:24:16,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:24:16,815 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-27 23:24:16,815 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:16,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-27 23:24:16,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 153 proven. 41 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2024-11-27 23:24:17,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:24:18,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:18,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345334638] [2024-11-27 23:24:18,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:24:18,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397082053] [2024-11-27 23:24:18,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397082053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:24:18,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:24:18,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-11-27 23:24:18,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002016119] [2024-11-27 23:24:18,470 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:24:18,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:24:18,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:18,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:24:18,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:24:18,471 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-27 23:24:18,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:24:18,736 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2024-11-27 23:24:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:24:18,737 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 108 [2024-11-27 23:24:18,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:24:18,738 INFO L225 Difference]: With dead ends: 120 [2024-11-27 23:24:18,738 INFO L226 Difference]: Without dead ends: 118 [2024-11-27 23:24:18,739 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:24:18,739 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:24:18,739 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 99 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:24:18,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-27 23:24:18,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2024-11-27 23:24:18,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 73 states have internal predecessors, (78), 31 states have call successors, (31), 16 states have call predecessors, (31), 16 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-27 23:24:18,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2024-11-27 23:24:18,803 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 108 [2024-11-27 23:24:18,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:24:18,804 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2024-11-27 23:24:18,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-27 23:24:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2024-11-27 23:24:18,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-27 23:24:18,806 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:24:18,806 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:24:18,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 23:24:19,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:19,011 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:24:19,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:24:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1608761601, now seen corresponding path program 3 times [2024-11-27 23:24:19,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:24:19,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466389538] [2024-11-27 23:24:19,012 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:24:19,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:24:19,078 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-27 23:24:19,078 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:24:19,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119790356] [2024-11-27 23:24:19,080 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:24:19,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:19,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:24:19,083 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:24:19,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:24:19,163 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-27 23:24:19,163 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:19,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-27 23:24:19,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 163 proven. 50 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2024-11-27 23:24:19,394 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:24:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2024-11-27 23:24:19,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:19,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466389538] [2024-11-27 23:24:19,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:24:19,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119790356] [2024-11-27 23:24:19,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119790356] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:24:19,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:24:19,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-11-27 23:24:19,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967628688] [2024-11-27 23:24:19,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:24:19,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 23:24:19,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:19,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 23:24:19,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:24:19,681 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-27 23:24:20,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:24:20,086 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2024-11-27 23:24:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:24:20,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 119 [2024-11-27 23:24:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:24:20,087 INFO L225 Difference]: With dead ends: 118 [2024-11-27 23:24:20,087 INFO L226 Difference]: Without dead ends: 0 [2024-11-27 23:24:20,088 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2024-11-27 23:24:20,090 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:24:20,090 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 115 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:24:20,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-27 23:24:20,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-27 23:24:20,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:24:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-27 23:24:20,091 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 119 [2024-11-27 23:24:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:24:20,092 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-27 23:24:20,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-27 23:24:20,093 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-27 23:24:20,093 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-27 23:24:20,097 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-27 23:24:20,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-27 23:24:20,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:20,306 INFO L422 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:24:20,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-27 23:24:22,563 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-27 23:24:22,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:24:22 BoogieIcfgContainer [2024-11-27 23:24:22,575 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-27 23:24:22,576 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-27 23:24:22,576 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-27 23:24:22,576 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-27 23:24:22,577 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:23:24" (3/4) ... [2024-11-27 23:24:22,579 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-27 23:24:22,584 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-27 23:24:22,588 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2024-11-27 23:24:22,588 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-11-27 23:24:22,588 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-27 23:24:22,588 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-27 23:24:22,588 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-27 23:24:22,676 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-27 23:24:22,676 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-27 23:24:22,677 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-27 23:24:22,678 INFO L158 Benchmark]: Toolchain (without parser) took 58582.17ms. Allocated memory was 142.6MB in the beginning and 427.8MB in the end (delta: 285.2MB). Free memory was 106.4MB in the beginning and 197.6MB in the end (delta: -91.2MB). Peak memory consumption was 188.3MB. Max. memory is 16.1GB. [2024-11-27 23:24:22,679 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 167.8MB. Free memory is still 106.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:24:22,679 INFO L158 Benchmark]: CACSL2BoogieTranslator took 346.36ms. Allocated memory is still 142.6MB. Free memory was 106.1MB in the beginning and 95.0MB in the end (delta: 11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 23:24:22,679 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.43ms. Allocated memory is still 142.6MB. Free memory was 94.7MB in the beginning and 93.7MB in the end (delta: 984.2kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:24:22,680 INFO L158 Benchmark]: Boogie Preprocessor took 64.98ms. Allocated memory is still 142.6MB. Free memory was 93.7MB in the beginning and 92.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:24:22,680 INFO L158 Benchmark]: RCFGBuilder took 312.28ms. Allocated memory is still 142.6MB. Free memory was 92.4MB in the beginning and 81.0MB in the end (delta: 11.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 23:24:22,680 INFO L158 Benchmark]: TraceAbstraction took 57703.77ms. Allocated memory was 142.6MB in the beginning and 427.8MB in the end (delta: 285.2MB). Free memory was 80.4MB in the beginning and 201.6MB in the end (delta: -121.3MB). Peak memory consumption was 214.8MB. Max. memory is 16.1GB. [2024-11-27 23:24:22,680 INFO L158 Benchmark]: Witness Printer took 100.87ms. Allocated memory is still 427.8MB. Free memory was 201.6MB in the beginning and 197.6MB in the end (delta: 4.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:24:22,682 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 167.8MB. Free memory is still 106.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 346.36ms. Allocated memory is still 142.6MB. Free memory was 106.1MB in the beginning and 95.0MB in the end (delta: 11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.43ms. Allocated memory is still 142.6MB. Free memory was 94.7MB in the beginning and 93.7MB in the end (delta: 984.2kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 64.98ms. Allocated memory is still 142.6MB. Free memory was 93.7MB in the beginning and 92.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 312.28ms. Allocated memory is still 142.6MB. Free memory was 92.4MB in the beginning and 81.0MB in the end (delta: 11.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 57703.77ms. Allocated memory was 142.6MB in the beginning and 427.8MB in the end (delta: 285.2MB). Free memory was 80.4MB in the beginning and 201.6MB in the end (delta: -121.3MB). Peak memory consumption was 214.8MB. Max. memory is 16.1GB. * Witness Printer took 100.87ms. Allocated memory is still 427.8MB. Free memory was 201.6MB in the beginning and 197.6MB in the end (delta: 4.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 55.4s, OverallIterations: 16, TraceHistogramMax: 21, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 24.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 284 SdHoareTripleChecker+Valid, 9.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 232 mSDsluCounter, 2090 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1680 mSDsCounter, 491 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2520 IncrementalHoareTripleChecker+Invalid, 3012 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 491 mSolverCounterUnsat, 410 mSDtfsCounter, 2520 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1664 GetRequests, 1450 SyntacticMatches, 14 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 20.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142occurred in iteration=12, InterpolantAutomatonStates: 154, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 16 MinimizatonAttempts, 78 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 25.7s InterpolantComputationTime, 1789 NumberOfCodeBlocks, 1647 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 1905 ConstructedInterpolants, 0 QuantifiedInterpolants, 16756 SizeOfPredicates, 26 NumberOfNonLiveVariables, 2004 ConjunctsInSsa, 317 ConjunctsInUnsatCore, 29 InterpolantComputations, 6 PerfectInterpolantSequences, 8795/9332 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: ((((1 <= p) && (A == ((long long) q + r))) && (d == p)) && (B == 1)) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((d == 1) && (p == 1)) && (q == 0)) && (A == r)) && (B == 1)) || (((((2 == p) && (q == 0)) && (A == r)) && (B == 1)) && (2 == d))) || (((((p == 4) && (q == 0)) && (A == r)) && (d == 4)) && (B == 1))) || (((((8 <= p) && (q == 0)) && (A == r)) && (d == p)) && (B == 1))) RESULT: Ultimate proved your program to be correct! [2024-11-27 23:24:22,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_672f7ab2-7894-437a-a0f9-68c9980b43bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE