./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.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_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/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_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/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_64ece62e-bd3e-407e-a673-5639c148789f/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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:23:28,317 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:23:28,402 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 23:23:28,409 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:23:28,409 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:23:28,453 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:23:28,453 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:23:28,454 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:23:28,454 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:23:28,454 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:23:28,454 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:23:28,455 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:23:28,455 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:23:28,455 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:23:28,455 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:23:28,456 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:23:28,456 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 23:23:28,456 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:23:28,456 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:23:28,456 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:23:28,457 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:23:28,457 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 23:23:28,457 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:23:28,457 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 23:23:28,457 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:23:28,457 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:23:28,458 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:23:28,458 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:23:28,458 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:23:28,458 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:23:28,458 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:23:28,458 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:23:28,458 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:23:28,459 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:23:28,459 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:23:28,459 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:23:28,459 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:23:28,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:23:28,459 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:23:28,459 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:23:28,459 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 23:23:28,460 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 23:23:28,460 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:23:28,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:23:28,460 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:23:28,460 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:23:28,461 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:23:28,461 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:23:28,461 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_64ece62e-bd3e-407e-a673-5639c148789f/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 -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2024-11-27 23:23:28,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:23:28,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:23:28,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:23:28,800 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:23:28,801 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:23:28,804 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-11-27 23:23:32,682 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/data/4a01f284b/d73e838a007b4a4e9ac829b05f19a971/FLAGb034cdcb0 [2024-11-27 23:23:33,075 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:23:33,076 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-11-27 23:23:33,088 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/data/4a01f284b/d73e838a007b4a4e9ac829b05f19a971/FLAGb034cdcb0 [2024-11-27 23:23:33,117 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/data/4a01f284b/d73e838a007b4a4e9ac829b05f19a971 [2024-11-27 23:23:33,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:23:33,124 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:23:33,127 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:23:33,127 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:23:33,133 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:23:33,134 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,135 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45bd004a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33, skipping insertion in model container [2024-11-27 23:23:33,136 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,159 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:23:33,366 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_64ece62e-bd3e-407e-a673-5639c148789f/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2024-11-27 23:23:33,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:23:33,446 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:23:33,459 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_64ece62e-bd3e-407e-a673-5639c148789f/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2024-11-27 23:23:33,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:23:33,495 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:23:33,496 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33 WrapperNode [2024-11-27 23:23:33,496 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:23:33,497 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:23:33,497 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:23:33,497 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:23:33,506 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,517 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,553 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 123 [2024-11-27 23:23:33,554 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:23:33,554 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:23:33,554 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:23:33,555 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:23:33,570 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,574 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,603 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-11-27 23:23:33,604 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,604 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,615 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,620 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,627 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,629 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,630 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,635 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:23:33,637 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:23:33,637 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:23:33,637 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:23:33,638 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33" (1/1) ... [2024-11-27 23:23:33,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:23:33,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:33,685 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:23:33,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:23:33,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:23:33,731 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-27 23:23:33,731 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-27 23:23:33,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:23:33,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 23:23:33,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 23:23:33,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 23:23:33,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 23:23:33,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:23:33,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:23:33,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 23:23:33,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 23:23:33,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-27 23:23:33,734 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-27 23:23:33,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 23:23:33,874 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:23:33,877 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:23:34,302 INFO L? ?]: Removed 46 outVars from TransFormulas that were not future-live. [2024-11-27 23:23:34,302 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:23:34,319 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:23:34,320 INFO L312 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-27 23:23:34,321 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:23:34 BoogieIcfgContainer [2024-11-27 23:23:34,321 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:23:34,325 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:23:34,325 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:23:34,334 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:23:34,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:23:33" (1/3) ... [2024-11-27 23:23:34,335 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@220f52b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:23:34, skipping insertion in model container [2024-11-27 23:23:34,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:33" (2/3) ... [2024-11-27 23:23:34,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@220f52b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:23:34, skipping insertion in model container [2024-11-27 23:23:34,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:23:34" (3/3) ... [2024-11-27 23:23:34,338 INFO L128 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2024-11-27 23:23:34,358 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:23:34,360 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG prefixsum_iter.c that has 3 procedures, 47 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2024-11-27 23:23:34,450 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:23:34,470 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;@1aeea621, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:23:34,471 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 23:23:34,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 39 states have (on average 1.435897435897436) internal successors, (56), 40 states have internal predecessors, (56), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:23:34,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-27 23:23:34,488 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:34,489 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:34,490 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:34,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:34,501 INFO L85 PathProgramCache]: Analyzing trace with hash 441511476, now seen corresponding path program 1 times [2024-11-27 23:23:34,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:34,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912091713] [2024-11-27 23:23:34,515 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 23:23:34,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:34,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912091713] [2024-11-27 23:23:34,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912091713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:34,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737321770] [2024-11-27 23:23:34,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:34,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:34,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:34,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:34,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:23:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:35,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-27 23:23:35,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 23:23:35,093 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:23:35,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737321770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:35,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:23:35,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-27 23:23:35,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816130601] [2024-11-27 23:23:35,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:35,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 23:23:35,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:35,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 23:23:35,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 23:23:35,134 INFO L87 Difference]: Start difference. First operand has 47 states, 39 states have (on average 1.435897435897436) internal successors, (56), 40 states have internal predecessors, (56), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 23:23:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:35,169 INFO L93 Difference]: Finished difference Result 91 states and 126 transitions. [2024-11-27 23:23:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 23:23:35,171 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-11-27 23:23:35,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:35,178 INFO L225 Difference]: With dead ends: 91 [2024-11-27 23:23:35,178 INFO L226 Difference]: Without dead ends: 43 [2024-11-27 23:23:35,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 39 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 23:23:35,187 INFO L435 NwaCegarLoop]: 55 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, 55 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 23:23:35,190 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:23:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-27 23:23:35,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-27 23:23:35,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:23:35,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-11-27 23:23:35,240 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 38 [2024-11-27 23:23:35,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:35,241 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-11-27 23:23:35,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 23:23:35,241 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-11-27 23:23:35,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-27 23:23:35,243 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:35,244 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:35,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 23:23:35,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-27 23:23:35,445 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:35,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:35,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2072454858, now seen corresponding path program 1 times [2024-11-27 23:23:35,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:35,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499429377] [2024-11-27 23:23:35,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:35,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 23:23:36,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:36,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499429377] [2024-11-27 23:23:36,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499429377] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:36,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:36,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 23:23:36,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61826982] [2024-11-27 23:23:36,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:36,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:23:36,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:36,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:23:36,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:23:36,198 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:23:36,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:36,324 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2024-11-27 23:23:36,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:23:36,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2024-11-27 23:23:36,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:36,326 INFO L225 Difference]: With dead ends: 66 [2024-11-27 23:23:36,327 INFO L226 Difference]: Without dead ends: 45 [2024-11-27 23:23:36,327 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:23:36,328 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:36,329 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 167 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:23:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-27 23:23:36,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2024-11-27 23:23:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:23:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-11-27 23:23:36,344 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 38 [2024-11-27 23:23:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:36,345 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-11-27 23:23:36,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:23:36,346 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-11-27 23:23:36,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-27 23:23:36,350 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:36,350 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:36,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:23:36,351 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:36,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:36,351 INFO L85 PathProgramCache]: Analyzing trace with hash 456651526, now seen corresponding path program 1 times [2024-11-27 23:23:36,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:36,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427103159] [2024-11-27 23:23:36,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:36,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 23:23:37,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:37,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427103159] [2024-11-27 23:23:37,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427103159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:37,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590036311] [2024-11-27 23:23:37,526 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:37,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:37,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:37,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:37,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:23:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:37,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-27 23:23:37,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:37,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:23:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 23:23:38,141 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:38,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-27 23:23:38,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-27 23:23:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 23:23:38,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590036311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:38,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:23:38,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 20 [2024-11-27 23:23:38,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537448597] [2024-11-27 23:23:38,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:38,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-27 23:23:38,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:38,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-27 23:23:38,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-11-27 23:23:38,397 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-27 23:23:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:39,061 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-11-27 23:23:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:23:39,063 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2024-11-27 23:23:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:39,065 INFO L225 Difference]: With dead ends: 67 [2024-11-27 23:23:39,067 INFO L226 Difference]: Without dead ends: 65 [2024-11-27 23:23:39,068 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-11-27 23:23:39,069 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 103 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:39,070 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 323 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:23:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-27 23:23:39,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2024-11-27 23:23:39,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:23:39,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-11-27 23:23:39,084 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 40 [2024-11-27 23:23:39,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:39,084 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-11-27 23:23:39,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-27 23:23:39,085 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-11-27 23:23:39,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-27 23:23:39,086 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:39,086 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:39,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 23:23:39,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:39,287 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:39,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:39,288 INFO L85 PathProgramCache]: Analyzing trace with hash 262521324, now seen corresponding path program 1 times [2024-11-27 23:23:39,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:39,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811930840] [2024-11-27 23:23:39,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:39,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 23:23:39,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:39,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811930840] [2024-11-27 23:23:39,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811930840] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:39,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078707557] [2024-11-27 23:23:39,672 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:39,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:39,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:39,674 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:39,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:23:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:39,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 23:23:39,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 23:23:39,955 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 23:23:40,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078707557] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:40,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:23:40,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2024-11-27 23:23:40,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260293874] [2024-11-27 23:23:40,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:40,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:23:40,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:40,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:23:40,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:23:40,087 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:23:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:40,231 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2024-11-27 23:23:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:23:40,232 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2024-11-27 23:23:40,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:40,233 INFO L225 Difference]: With dead ends: 78 [2024-11-27 23:23:40,233 INFO L226 Difference]: Without dead ends: 53 [2024-11-27 23:23:40,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:23:40,234 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 14 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:40,235 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 216 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:23:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-27 23:23:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2024-11-27 23:23:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:23:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2024-11-27 23:23:40,244 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 44 [2024-11-27 23:23:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:40,245 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2024-11-27 23:23:40,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:23:40,245 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2024-11-27 23:23:40,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-27 23:23:40,246 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:40,246 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:40,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:40,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:40,451 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:40,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:40,452 INFO L85 PathProgramCache]: Analyzing trace with hash 142831912, now seen corresponding path program 2 times [2024-11-27 23:23:40,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:40,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396858408] [2024-11-27 23:23:40,452 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:23:40,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:40,496 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:23:40,496 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 23:23:40,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:40,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396858408] [2024-11-27 23:23:40,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396858408] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:40,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941550991] [2024-11-27 23:23:40,762 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:23:40,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:40,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:40,769 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:40,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:23:40,913 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:23:40,913 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:40,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:23:40,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 23:23:41,047 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:23:41,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941550991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:41,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:23:41,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2024-11-27 23:23:41,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580088025] [2024-11-27 23:23:41,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:41,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:23:41,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:41,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:23:41,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:23:41,050 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:23:41,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:41,169 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2024-11-27 23:23:41,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:23:41,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2024-11-27 23:23:41,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:41,170 INFO L225 Difference]: With dead ends: 73 [2024-11-27 23:23:41,170 INFO L226 Difference]: Without dead ends: 54 [2024-11-27 23:23:41,171 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:23:41,172 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:41,172 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 143 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:23:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-27 23:23:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2024-11-27 23:23:41,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:23:41,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2024-11-27 23:23:41,190 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 46 [2024-11-27 23:23:41,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:41,194 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2024-11-27 23:23:41,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:23:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2024-11-27 23:23:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-27 23:23:41,196 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:41,196 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:41,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:41,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:41,397 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:41,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:41,397 INFO L85 PathProgramCache]: Analyzing trace with hash 782983646, now seen corresponding path program 1 times [2024-11-27 23:23:41,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:41,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000002430] [2024-11-27 23:23:41,398 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:41,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-27 23:23:41,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:41,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000002430] [2024-11-27 23:23:41,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000002430] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:41,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:41,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:23:41,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534691967] [2024-11-27 23:23:41,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:41,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:23:41,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:41,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:23:41,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:23:41,544 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:23:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:41,592 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2024-11-27 23:23:41,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:23:41,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2024-11-27 23:23:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:41,594 INFO L225 Difference]: With dead ends: 74 [2024-11-27 23:23:41,597 INFO L226 Difference]: Without dead ends: 52 [2024-11-27 23:23:41,597 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:23:41,598 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:41,599 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 129 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:23:41,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-27 23:23:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-11-27 23:23:41,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:23:41,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-11-27 23:23:41,615 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 50 [2024-11-27 23:23:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:41,617 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-11-27 23:23:41,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:23:41,617 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-11-27 23:23:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-27 23:23:41,618 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:41,619 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:41,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 23:23:41,619 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:41,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:41,620 INFO L85 PathProgramCache]: Analyzing trace with hash 368949658, now seen corresponding path program 1 times [2024-11-27 23:23:41,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:41,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281300417] [2024-11-27 23:23:41,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:41,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:23:41,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:41,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281300417] [2024-11-27 23:23:41,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281300417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:41,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795353030] [2024-11-27 23:23:41,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:41,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:41,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:41,997 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:42,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:23:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:42,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:23:42,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:23:42,255 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:23:42,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795353030] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:42,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:23:42,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 10 [2024-11-27 23:23:42,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541105592] [2024-11-27 23:23:42,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:42,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:23:42,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:42,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:23:42,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:23:42,257 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:23:42,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:42,351 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2024-11-27 23:23:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:23:42,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2024-11-27 23:23:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:42,353 INFO L225 Difference]: With dead ends: 67 [2024-11-27 23:23:42,353 INFO L226 Difference]: Without dead ends: 57 [2024-11-27 23:23:42,353 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:23:42,354 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:42,354 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 197 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:23:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-27 23:23:42,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-11-27 23:23:42,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:23:42,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-11-27 23:23:42,375 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 52 [2024-11-27 23:23:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:42,375 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-11-27 23:23:42,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:23:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-11-27 23:23:42,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-27 23:23:42,377 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:42,377 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:42,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:42,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 23:23:42,578 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:42,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:42,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1778490588, now seen corresponding path program 1 times [2024-11-27 23:23:42,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:42,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243838723] [2024-11-27 23:23:42,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:42,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:23:43,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:43,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243838723] [2024-11-27 23:23:43,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243838723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:43,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963515808] [2024-11-27 23:23:43,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:43,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:43,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:43,014 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:43,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:23:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:43,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:23:43,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:23:43,385 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:23:43,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963515808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:43,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:23:43,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2024-11-27 23:23:43,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105533802] [2024-11-27 23:23:43,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:43,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:23:43,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:43,674 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:23:43,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:23:43,675 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:23:43,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:43,972 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2024-11-27 23:23:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 23:23:43,973 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 56 [2024-11-27 23:23:43,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:43,974 INFO L225 Difference]: With dead ends: 69 [2024-11-27 23:23:43,974 INFO L226 Difference]: Without dead ends: 59 [2024-11-27 23:23:43,974 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:23:43,977 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 35 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:43,977 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 293 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:23:43,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-27 23:23:43,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2024-11-27 23:23:43,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:23:43,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-11-27 23:23:43,999 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 56 [2024-11-27 23:23:44,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:44,000 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-11-27 23:23:44,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:23:44,000 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-11-27 23:23:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-27 23:23:44,001 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:44,001 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:44,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:44,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-27 23:23:44,204 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:23:44,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:44,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1310571480, now seen corresponding path program 1 times [2024-11-27 23:23:44,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:44,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535183130] [2024-11-27 23:23:44,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:44,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-27 23:23:44,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:44,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535183130] [2024-11-27 23:23:44,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535183130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:44,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067724815] [2024-11-27 23:23:44,673 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:44,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:44,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:44,676 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:44,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:23:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:44,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-27 23:23:44,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:44,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:23:44,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-27 23:23:45,055 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-27 23:23:45,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-11-27 23:23:45,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2024-11-27 23:23:45,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-27 23:23:45,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2024-11-27 23:23:45,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2024-11-27 23:23:45,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 14 [2024-11-27 23:23:45,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2024-11-27 23:23:46,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2024-11-27 23:23:46,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2024-11-27 23:23:47,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 77 [2024-11-27 23:23:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 23:23:47,255 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:24:38,320 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_197 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_21| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_12| Int)) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_12| |ULTIMATE.start_main_~a~0#1.offset|) (let ((.cse8 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (let ((.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse8) (select (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse8))) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4 .cse8) v_ArrVal_197)))) (let ((.cse1 (store (let ((.cse7 (* |v_ULTIMATE.start_upsweep_~left~0#1_21| 4))) (let ((.cse5 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_12| .cse7 4))) (store .cse5 .cse6 (+ (select .cse5 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_12| .cse7)) (select .cse5 .cse6))))) (+ |ULTIMATE.start_main_~a~0#1.offset| 4 .cse8) 0)) (.cse2 (+ |ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse4 (select .cse1 .cse2))) (let ((.cse3 (+ .cse4 (select .cse1 |ULTIMATE.start_main_~a~0#1.offset|)))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse1 .cse2 .cse3) |ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) .cse3)))))) (< |v_ULTIMATE.start_upsweep_~left~0#1_21| 0))) is different from false [2024-11-27 23:24:42,473 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_197 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_21| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_12| Int)) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_12| |ULTIMATE.start_main_~a~0#1.offset|) (let ((.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset| (select (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|)) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) v_ArrVal_197)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse4 (select .cse1 |ULTIMATE.start_main_~a~0#1.offset|))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store (let ((.cse3 (* |v_ULTIMATE.start_upsweep_~left~0#1_21| 4))) (let ((.cse2 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_12| .cse3 4))) (store .cse1 .cse2 (+ (select .cse1 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_12| .cse3)) (select .cse1 .cse2))))) (+ |ULTIMATE.start_main_~a~0#1.offset| 4) .cse4) |ULTIMATE.start_main_~a~0#1.offset| 0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) .cse4)))) (< |v_ULTIMATE.start_upsweep_~left~0#1_21| 0))) is different from false [2024-11-27 23:24:42,565 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_197 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_21| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_12| Int) (v_ArrVal_203 (Array Int Int))) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_12| |ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~left~0#1_21| 0) (let ((.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store v_ArrVal_203 |ULTIMATE.start_main_~a0~0#1.offset| (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_203) |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|)) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) v_ArrVal_197)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse4 (select .cse1 |ULTIMATE.start_main_~a~0#1.offset|))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store (let ((.cse3 (* |v_ULTIMATE.start_upsweep_~left~0#1_21| 4))) (let ((.cse2 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_12| .cse3 4))) (store .cse1 .cse2 (+ (select .cse1 .cse2) (select .cse1 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_12| .cse3)))))) (+ |ULTIMATE.start_main_~a~0#1.offset| 4) .cse4) |ULTIMATE.start_main_~a~0#1.offset| 0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) .cse4)))))) is different from false [2024-11-27 23:24:42,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067724815] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:24:42,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:24:42,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 25] total 32 [2024-11-27 23:24:42,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774485924] [2024-11-27 23:24:42,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:24:42,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-27 23:24:42,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:42,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-27 23:24:42,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1933, Unknown=9, NotChecked=276, Total=2450 [2024-11-27 23:24:42,575 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 29 states have internal predecessors, (84), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-27 23:24:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:24:48,217 INFO L93 Difference]: Finished difference Result 164 states and 197 transitions. [2024-11-27 23:24:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-27 23:24:48,217 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 29 states have internal predecessors, (84), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 58 [2024-11-27 23:24:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:24:48,218 INFO L225 Difference]: With dead ends: 164 [2024-11-27 23:24:48,219 INFO L226 Difference]: Without dead ends: 136 [2024-11-27 23:24:48,223 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=644, Invalid=6001, Unknown=9, NotChecked=486, Total=7140 [2024-11-27 23:24:48,225 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 147 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:24:48,227 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 470 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-27 23:24:48,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-27 23:24:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 92. [2024-11-27 23:24:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 82 states have internal predecessors, (97), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 23:24:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2024-11-27 23:24:48,257 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 58 [2024-11-27 23:24:48,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:24:48,257 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2024-11-27 23:24:48,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 29 states have internal predecessors, (84), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-27 23:24:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2024-11-27 23:24:48,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-27 23:24:48,259 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:24:48,259 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:24:48,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 23:24:48,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:48,460 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:24:48,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:24:48,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1896782436, now seen corresponding path program 2 times [2024-11-27 23:24:48,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:24:48,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13392782] [2024-11-27 23:24:48,461 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:24:48,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:24:48,505 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:24:48,506 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-27 23:24:48,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:48,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13392782] [2024-11-27 23:24:48,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13392782] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:24:48,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051738065] [2024-11-27 23:24:48,738 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:24:48,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:48,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:24:48,740 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:24:48,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:24:48,905 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:24:48,905 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:48,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:24:48,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:24:49,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:24:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:24:49,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051738065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:24:49,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:24:49,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 15 [2024-11-27 23:24:49,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634669074] [2024-11-27 23:24:49,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:24:49,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:24:49,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:49,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:24:49,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:24:49,282 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:24:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:24:49,920 INFO L93 Difference]: Finished difference Result 144 states and 176 transitions. [2024-11-27 23:24:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:24:49,921 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2024-11-27 23:24:49,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:24:49,922 INFO L225 Difference]: With dead ends: 144 [2024-11-27 23:24:49,922 INFO L226 Difference]: Without dead ends: 118 [2024-11-27 23:24:49,923 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2024-11-27 23:24:49,923 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 37 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:24:49,924 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 462 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:24:49,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-27 23:24:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2024-11-27 23:24:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 23:24:49,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2024-11-27 23:24:49,944 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 60 [2024-11-27 23:24:49,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:24:49,945 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2024-11-27 23:24:49,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:24:49,945 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2024-11-27 23:24:49,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-27 23:24:49,947 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:24:49,947 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:24:49,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 23:24:50,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 23:24:50,152 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:24:50,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:24:50,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1671635310, now seen corresponding path program 1 times [2024-11-27 23:24:50,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:24:50,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891575813] [2024-11-27 23:24:50,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:24:50,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:24:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:24:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 23:24:50,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:50,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891575813] [2024-11-27 23:24:50,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891575813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:24:50,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399849378] [2024-11-27 23:24:50,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:24:50,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:50,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:24:50,536 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:24:50,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:24:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:24:50,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:24:50,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:24:50,975 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:24:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:24:51,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399849378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:24:51,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:24:51,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2024-11-27 23:24:51,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453609716] [2024-11-27 23:24:51,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:24:51,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:24:51,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:51,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:24:51,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:24:51,197 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:24:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:24:51,450 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2024-11-27 23:24:51,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:24:51,451 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2024-11-27 23:24:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:24:51,452 INFO L225 Difference]: With dead ends: 139 [2024-11-27 23:24:51,452 INFO L226 Difference]: Without dead ends: 123 [2024-11-27 23:24:51,452 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:24:51,453 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:24:51,453 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 269 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:24:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-27 23:24:51,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 116. [2024-11-27 23:24:51,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 106 states have (on average 1.179245283018868) internal successors, (125), 106 states have internal predecessors, (125), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 23:24:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 139 transitions. [2024-11-27 23:24:51,488 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 139 transitions. Word has length 64 [2024-11-27 23:24:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:24:51,489 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 139 transitions. [2024-11-27 23:24:51,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:24:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 139 transitions. [2024-11-27 23:24:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-27 23:24:51,490 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:24:51,490 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:24:51,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 23:24:51,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 23:24:51,695 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:24:51,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:24:51,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1764078922, now seen corresponding path program 2 times [2024-11-27 23:24:51,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:24:51,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199693769] [2024-11-27 23:24:51,695 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:24:51,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:24:51,726 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:24:51,726 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:24:52,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:52,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199693769] [2024-11-27 23:24:52,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199693769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:24:52,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787930919] [2024-11-27 23:24:52,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:24:52,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:52,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:24:52,394 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:24:52,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:24:52,562 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:24:52,562 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:52,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 23:24:52,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 23:24:52,825 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:24:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 23:24:53,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787930919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:24:53,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:24:53,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 23 [2024-11-27 23:24:53,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490025546] [2024-11-27 23:24:53,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:24:53,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-27 23:24:53,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:53,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-27 23:24:53,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2024-11-27 23:24:53,174 INFO L87 Difference]: Start difference. First operand 116 states and 139 transitions. Second operand has 23 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-27 23:24:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:24:54,172 INFO L93 Difference]: Finished difference Result 147 states and 175 transitions. [2024-11-27 23:24:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 23:24:54,173 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 64 [2024-11-27 23:24:54,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:24:54,174 INFO L225 Difference]: With dead ends: 147 [2024-11-27 23:24:54,174 INFO L226 Difference]: Without dead ends: 120 [2024-11-27 23:24:54,175 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2024-11-27 23:24:54,175 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:24:54,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 366 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 23:24:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-27 23:24:54,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2024-11-27 23:24:54,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 23:24:54,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2024-11-27 23:24:54,205 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 64 [2024-11-27 23:24:54,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:24:54,206 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2024-11-27 23:24:54,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-27 23:24:54,206 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2024-11-27 23:24:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-27 23:24:54,207 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:24:54,207 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:24:54,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 23:24:54,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 23:24:54,408 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:24:54,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:24:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1433308446, now seen corresponding path program 3 times [2024-11-27 23:24:54,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:24:54,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017886657] [2024-11-27 23:24:54,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:24:54,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:24:54,460 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:24:54,460 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 23:24:54,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:54,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017886657] [2024-11-27 23:24:54,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017886657] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:24:54,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631909240] [2024-11-27 23:24:54,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:24:54,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:54,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:24:54,772 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:24:54,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:24:54,959 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:24:54,959 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:54,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:24:54,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:24:55,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:24:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:24:55,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631909240] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:24:55,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:24:55,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-27 23:24:55,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887921447] [2024-11-27 23:24:55,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:24:55,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 23:24:55,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:55,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 23:24:55,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:24:55,414 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:24:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:24:55,893 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2024-11-27 23:24:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:24:55,894 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 66 [2024-11-27 23:24:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:24:55,896 INFO L225 Difference]: With dead ends: 135 [2024-11-27 23:24:55,896 INFO L226 Difference]: Without dead ends: 93 [2024-11-27 23:24:55,897 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 120 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:24:55,898 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 18 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:24:55,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 429 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:24:55,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-27 23:24:55,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2024-11-27 23:24:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:24:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2024-11-27 23:24:55,914 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 66 [2024-11-27 23:24:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:24:55,915 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2024-11-27 23:24:55,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:24:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2024-11-27 23:24:55,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-27 23:24:55,916 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:24:55,916 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:24:55,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 23:24:56,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 23:24:56,117 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:24:56,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:24:56,117 INFO L85 PathProgramCache]: Analyzing trace with hash -303661156, now seen corresponding path program 3 times [2024-11-27 23:24:56,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:24:56,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741887900] [2024-11-27 23:24:56,118 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:24:56,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:24:56,169 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:24:56,169 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-27 23:24:56,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:56,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741887900] [2024-11-27 23:24:56,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741887900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:24:56,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106923744] [2024-11-27 23:24:56,612 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:24:56,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:56,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:24:56,614 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:24:56,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:24:56,809 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:24:56,809 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:56,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-27 23:24:56,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-27 23:24:57,394 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:24:57,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106923744] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:24:57,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:24:57,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2024-11-27 23:24:57,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395497918] [2024-11-27 23:24:57,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:24:57,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:24:57,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:57,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:24:57,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-11-27 23:24:57,396 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:24:57,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:24:57,764 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2024-11-27 23:24:57,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 23:24:57,764 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 72 [2024-11-27 23:24:57,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:24:57,765 INFO L225 Difference]: With dead ends: 127 [2024-11-27 23:24:57,765 INFO L226 Difference]: Without dead ends: 70 [2024-11-27 23:24:57,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-27 23:24:57,766 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:24:57,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 278 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:24:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-27 23:24:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-11-27 23:24:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:24:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2024-11-27 23:24:57,783 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 72 [2024-11-27 23:24:57,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:24:57,783 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2024-11-27 23:24:57,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:24:57,783 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2024-11-27 23:24:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-27 23:24:57,784 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:24:57,784 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:24:57,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 23:24:57,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 23:24:57,985 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:24:57,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:24:57,986 INFO L85 PathProgramCache]: Analyzing trace with hash -792078560, now seen corresponding path program 4 times [2024-11-27 23:24:57,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:24:57,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666462991] [2024-11-27 23:24:57,986 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:24:57,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:24:58,055 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:24:58,055 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-27 23:24:58,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:58,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666462991] [2024-11-27 23:24:58,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666462991] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:24:58,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450792879] [2024-11-27 23:24:58,358 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:24:58,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:58,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:24:58,362 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:24:58,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 23:24:58,649 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:24:58,649 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:58,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-11-27 23:24:58,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:58,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:24:58,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-27 23:24:58,895 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-27 23:24:58,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-11-27 23:24:59,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2024-11-27 23:24:59,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-11-27 23:24:59,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-27 23:24:59,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2024-11-27 23:25:00,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 48 [2024-11-27 23:25:00,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2024-11-27 23:25:00,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 48 [2024-11-27 23:25:01,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2024-11-27 23:25:02,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 71 [2024-11-27 23:25:03,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 142 [2024-11-27 23:25:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 23:25:03,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:22,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450792879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:22,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:27:22,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 31] total 39 [2024-11-27 23:27:22,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856583750] [2024-11-27 23:27:22,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:22,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-27 23:27:22,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:22,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-27 23:27:22,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=3728, Unknown=22, NotChecked=0, Total=4160 [2024-11-27 23:27:22,405 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 39 states, 37 states have (on average 2.810810810810811) internal successors, (104), 35 states have internal predecessors, (104), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-27 23:27:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:27:29,945 INFO L93 Difference]: Finished difference Result 153 states and 180 transitions. [2024-11-27 23:27:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-27 23:27:29,946 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.810810810810811) internal successors, (104), 35 states have internal predecessors, (104), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 74 [2024-11-27 23:27:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:27:29,947 INFO L225 Difference]: With dead ends: 153 [2024-11-27 23:27:29,947 INFO L226 Difference]: Without dead ends: 113 [2024-11-27 23:27:29,949 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 144.6s TimeCoverageRelationStatistics Valid=951, Invalid=8339, Unknown=22, NotChecked=0, Total=9312 [2024-11-27 23:27:29,950 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 207 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:27:29,950 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 407 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-27 23:27:29,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-27 23:27:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 96. [2024-11-27 23:27:29,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:27:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2024-11-27 23:27:29,979 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 74 [2024-11-27 23:27:29,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:27:29,979 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2024-11-27 23:27:29,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.810810810810811) internal successors, (104), 35 states have internal predecessors, (104), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-27 23:27:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2024-11-27 23:27:29,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-27 23:27:29,981 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:27:29,981 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:27:29,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 23:27:30,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-27 23:27:30,184 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:27:30,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:30,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1188984642, now seen corresponding path program 5 times [2024-11-27 23:27:30,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:30,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376519591] [2024-11-27 23:27:30,185 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:27:30,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:30,270 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-27 23:27:30,270 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-27 23:27:30,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:30,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376519591] [2024-11-27 23:27:30,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376519591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:30,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467854905] [2024-11-27 23:27:30,649 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:27:30,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:30,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:30,652 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:30,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 23:27:31,082 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-27 23:27:31,083 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:31,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 23:27:31,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-27 23:27:31,341 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-27 23:27:31,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467854905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:27:31,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:27:31,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 18 [2024-11-27 23:27:31,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193022026] [2024-11-27 23:27:31,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:31,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:27:31,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:31,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:27:31,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:27:31,752 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:27:32,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:27:32,190 INFO L93 Difference]: Finished difference Result 133 states and 158 transitions. [2024-11-27 23:27:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:27:32,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 80 [2024-11-27 23:27:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:27:32,192 INFO L225 Difference]: With dead ends: 133 [2024-11-27 23:27:32,192 INFO L226 Difference]: Without dead ends: 118 [2024-11-27 23:27:32,192 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-27 23:27:32,193 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 36 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:27:32,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 370 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:27:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-27 23:27:32,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2024-11-27 23:27:32,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 93 states have internal predecessors, (111), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:27:32,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2024-11-27 23:27:32,218 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 80 [2024-11-27 23:27:32,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:27:32,218 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2024-11-27 23:27:32,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:27:32,218 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2024-11-27 23:27:32,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-27 23:27:32,219 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:27:32,220 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:27:32,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-27 23:27:32,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 23:27:32,420 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:27:32,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1230112838, now seen corresponding path program 6 times [2024-11-27 23:27:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:32,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496369342] [2024-11-27 23:27:32,421 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:27:32,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:32,535 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-27 23:27:32,536 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-27 23:27:32,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:32,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496369342] [2024-11-27 23:27:32,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496369342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:32,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416008832] [2024-11-27 23:27:32,960 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:27:32,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:32,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:32,962 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:32,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 23:27:33,347 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-27 23:27:33,348 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:33,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-27 23:27:33,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-27 23:27:34,313 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-27 23:27:35,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416008832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:27:35,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:27:35,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 18] total 39 [2024-11-27 23:27:35,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487784895] [2024-11-27 23:27:35,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:35,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-27 23:27:35,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:35,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-27 23:27:35,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2024-11-27 23:27:35,619 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand has 39 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 39 states have internal predecessors, (110), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:27:38,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:27:38,845 INFO L93 Difference]: Finished difference Result 206 states and 252 transitions. [2024-11-27 23:27:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-27 23:27:38,846 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 39 states have internal predecessors, (110), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 82 [2024-11-27 23:27:38,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:27:38,847 INFO L225 Difference]: With dead ends: 206 [2024-11-27 23:27:38,847 INFO L226 Difference]: Without dead ends: 140 [2024-11-27 23:27:38,849 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1056, Invalid=4644, Unknown=0, NotChecked=0, Total=5700 [2024-11-27 23:27:38,850 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 82 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:27:38,850 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 806 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-27 23:27:38,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-27 23:27:38,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 131. [2024-11-27 23:27:38,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 124 states have internal predecessors, (148), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:27:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2024-11-27 23:27:38,891 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 82 [2024-11-27 23:27:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:27:38,891 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2024-11-27 23:27:38,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 39 states have internal predecessors, (110), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:27:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2024-11-27 23:27:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-27 23:27:38,893 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:27:38,893 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:27:38,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-27 23:27:39,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 23:27:39,097 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:27:39,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:39,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2008563510, now seen corresponding path program 7 times [2024-11-27 23:27:39,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:39,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94307782] [2024-11-27 23:27:39,097 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:27:39,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:27:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-27 23:27:39,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:39,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94307782] [2024-11-27 23:27:39,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94307782] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:39,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49039297] [2024-11-27 23:27:39,910 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:27:39,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:39,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:39,916 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:39,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 23:27:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:27:40,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-11-27 23:27:40,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:40,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:27:40,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-27 23:27:40,524 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-27 23:27:40,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-11-27 23:27:40,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2024-11-27 23:27:40,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-27 23:27:40,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2024-11-27 23:27:40,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-27 23:27:40,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 29 [2024-11-27 23:27:41,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2024-11-27 23:27:41,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:27:41,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2024-11-27 23:27:41,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2024-11-27 23:27:41,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:27:41,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2024-11-27 23:27:41,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2024-11-27 23:27:42,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2024-11-27 23:27:42,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2024-11-27 23:27:42,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-11-27 23:27:43,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 81 [2024-11-27 23:27:43,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-11-27 23:27:44,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 87 [2024-11-27 23:27:44,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 103 [2024-11-27 23:27:44,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:27:44,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 35 [2024-11-27 23:27:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:27:45,026 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:30:06,403 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_y_17 Int)) (let ((.cse19 (* v_y_17 2))) (or (let ((.cse15 (* |c_ULTIMATE.start_upsweep_~space~0#1| 4)) (.cse16 (* |c_ULTIMATE.start_upsweep_~space~0#1| 8))) (let ((.cse1 (store |c_#memory_int#1| |c_ULTIMATE.start_upsweep_~a#1.base| (let ((.cse18 (+ (- 4) .cse16 |c_ULTIMATE.start_upsweep_~a#1.offset|)) (.cse17 (select |c_#memory_int#1| |c_ULTIMATE.start_upsweep_~a#1.base|))) (store .cse17 .cse18 (+ (select .cse17 .cse18) (select .cse17 (+ (- 4) |c_ULTIMATE.start_upsweep_~a#1.offset| .cse15)))))))) (let ((.cse2 (let ((.cse3 (let ((.cse7 (let ((.cse11 (store (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 4) (* |c_ULTIMATE.start_main_~n~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (.cse12 (+ (- 4) .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse13 (+ (- 4) |c_ULTIMATE.start_main_~a~0#1.offset| .cse15)) (.cse14 (select .cse11 .cse12))) (store (store .cse11 .cse12 (+ (select .cse11 .cse13) .cse14)) .cse13 .cse14)))) (.cse8 (+ (- 4) (* v_y_17 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse10 (+ (- 4) |c_ULTIMATE.start_main_~a~0#1.offset| (* v_y_17 4))) (.cse9 (select .cse7 .cse8))) (store (store .cse7 .cse8 (+ .cse9 (select .cse7 .cse10))) .cse10 .cse9)))) (.cse4 (+ (- 4) (* v_y_17 16) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse6 (+ (* v_y_17 12) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (select .cse3 .cse4))) (store (store .cse3 .cse4 (+ .cse5 (select .cse3 .cse6))) .cse6 .cse5))))) (= (let ((.cse0 (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~a0~0#1.base|))) (+ (select .cse0 |c_ULTIMATE.start_main_~a0~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 4)))) (select .cse2 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (< (+ .cse19 1) |c_ULTIMATE.start_upsweep_~space~0#1|) (< v_y_17 1) (< |c_ULTIMATE.start_upsweep_~space~0#1| .cse19)))) is different from false [2024-11-27 23:30:49,081 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~mem17#1_86| Int) (|v_ULTIMATE.start_main_#t~mem17#1_87| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int)) (let ((.cse13 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (let ((.cse1 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store (let ((.cse14 (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse13) (select (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse13))))) (store .cse14 (+ |ULTIMATE.start_main_~a0~0#1.offset| 4 .cse13) (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| .cse14) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4 .cse13)))) (+ |ULTIMATE.start_main_~a0~0#1.offset| 8 .cse13) |v_ULTIMATE.start_main_#t~mem17#1_86|) (+ |ULTIMATE.start_main_~a0~0#1.offset| 12 .cse13) |v_ULTIMATE.start_main_#t~mem17#1_87|)))) (let ((.cse9 (+ |ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse7 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) (.cse4 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse2 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (+ |ULTIMATE.start_main_~a~0#1.offset| 12 .cse13))) (let ((.cse5 (store (let ((.cse11 (select .cse2 |ULTIMATE.start_main_~a~0#1.offset|)) (.cse12 (select .cse2 .cse4))) (store (store .cse2 .cse4 (+ .cse11 .cse12)) .cse7 (+ .cse11 (select .cse2 .cse9) .cse12 (select .cse2 .cse7)))) .cse3 0))) (let ((.cse8 (select .cse5 .cse4)) (.cse6 (select .cse5 .cse7))) (let ((.cse10 (+ .cse8 .cse6))) (= (let ((.cse0 (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store (store (store (store .cse2 .cse3 0) .cse4 (+ (select .cse5 |ULTIMATE.start_main_~a~0#1.offset|) .cse6)) |ULTIMATE.start_main_~a~0#1.offset| .cse6) .cse7 (+ .cse8 .cse6 (select .cse5 .cse9))) .cse9 .cse10)) |c_ULTIMATE.start_main_~a0~0#1.base|))) (+ (select .cse0 (+ |ULTIMATE.start_main_~a0~0#1.offset| 4)) (select .cse0 |ULTIMATE.start_main_~a0~0#1.offset|))) .cse10)))))))) is different from false [2024-11-27 23:31:21,750 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~mem17#1_86| Int) (|v_ULTIMATE.start_main_#t~mem17#1_87| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (v_ArrVal_642 (Array Int Int))) (let ((.cse1 (+ |ULTIMATE.start_main_~a0~0#1.offset| 4)) (.cse4 (+ |ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse2 (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store (let ((.cse9 (store v_ArrVal_642 |ULTIMATE.start_main_~a0~0#1.offset| (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_642) |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|)))) (store .cse9 .cse1 (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse9) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))) (+ |ULTIMATE.start_main_~a0~0#1.offset| 8) |v_ULTIMATE.start_main_#t~mem17#1_86|) (+ |ULTIMATE.start_main_~a0~0#1.offset| 12) |v_ULTIMATE.start_main_#t~mem17#1_87|)))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse5 (select .cse3 |ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (select .cse3 .cse4))) (let ((.cse8 (+ .cse5 .cse7))) (= (let ((.cse0 (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse6 (+ |ULTIMATE.start_main_~a~0#1.offset| 8))) (store (store (store (store .cse3 .cse4 .cse5) |ULTIMATE.start_main_~a~0#1.offset| 0) (+ |ULTIMATE.start_main_~a~0#1.offset| 12) (+ (select .cse3 .cse6) .cse5 .cse7)) .cse6 .cse8))) |c_ULTIMATE.start_main_#t~malloc16#1.base|))) (+ (select .cse0 .cse1) (select .cse0 |ULTIMATE.start_main_~a0~0#1.offset|))) .cse8))))))) is different from false [2024-11-27 23:31:21,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49039297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:31:21,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:31:21,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 38] total 49 [2024-11-27 23:31:21,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524340419] [2024-11-27 23:31:21,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:31:21,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-27 23:31:21,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:31:21,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-27 23:31:21,762 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=5269, Unknown=30, NotChecked=450, Total=6162 [2024-11-27 23:31:21,762 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand has 49 states, 47 states have (on average 2.5319148936170213) internal successors, (119), 46 states have internal predecessors, (119), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-27 23:31:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:31:36,626 INFO L93 Difference]: Finished difference Result 395 states and 477 transitions. [2024-11-27 23:31:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-27 23:31:36,626 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.5319148936170213) internal successors, (119), 46 states have internal predecessors, (119), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 84 [2024-11-27 23:31:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:31:36,628 INFO L225 Difference]: With dead ends: 395 [2024-11-27 23:31:36,628 INFO L226 Difference]: Without dead ends: 295 [2024-11-27 23:31:36,631 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3451 ImplicationChecksByTransitivity, 229.2s TimeCoverageRelationStatistics Valid=1033, Invalid=14699, Unknown=30, NotChecked=750, Total=16512 [2024-11-27 23:31:36,631 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 164 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 3170 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 3212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:31:36,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 909 Invalid, 3212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3170 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-27 23:31:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-11-27 23:31:36,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 190. [2024-11-27 23:31:36,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 180 states have (on average 1.1833333333333333) internal successors, (213), 180 states have internal predecessors, (213), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 23:31:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 227 transitions. [2024-11-27 23:31:36,684 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 227 transitions. Word has length 84 [2024-11-27 23:31:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:31:36,685 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 227 transitions. [2024-11-27 23:31:36,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.5319148936170213) internal successors, (119), 46 states have internal predecessors, (119), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-27 23:31:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 227 transitions. [2024-11-27 23:31:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-27 23:31:36,687 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:31:36,687 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:31:36,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 23:31:36,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 23:31:36,888 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:31:36,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:31:36,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1950568534, now seen corresponding path program 8 times [2024-11-27 23:31:36,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:31:36,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991704436] [2024-11-27 23:31:36,888 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:31:36,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:31:36,928 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:31:36,928 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-27 23:31:37,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:31:37,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991704436] [2024-11-27 23:31:37,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991704436] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:31:37,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159905506] [2024-11-27 23:31:37,367 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:31:37,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:37,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:31:37,371 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:31:37,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 23:31:37,617 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:31:37,617 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:37,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 23:31:37,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:31:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-27 23:31:37,886 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:31:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-27 23:31:38,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159905506] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:31:38,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:31:38,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 20 [2024-11-27 23:31:38,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693914265] [2024-11-27 23:31:38,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:31:38,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-27 23:31:38,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:31:38,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-27 23:31:38,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-27 23:31:38,185 INFO L87 Difference]: Start difference. First operand 190 states and 227 transitions. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:31:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:31:38,782 INFO L93 Difference]: Finished difference Result 250 states and 302 transitions. [2024-11-27 23:31:38,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:31:38,783 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 86 [2024-11-27 23:31:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:31:38,784 INFO L225 Difference]: With dead ends: 250 [2024-11-27 23:31:38,784 INFO L226 Difference]: Without dead ends: 218 [2024-11-27 23:31:38,785 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 160 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2024-11-27 23:31:38,785 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:31:38,785 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 365 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:31:38,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-27 23:31:38,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 190. [2024-11-27 23:31:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 180 states have (on average 1.1777777777777778) internal successors, (212), 180 states have internal predecessors, (212), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 23:31:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 226 transitions. [2024-11-27 23:31:38,883 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 226 transitions. Word has length 86 [2024-11-27 23:31:38,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:31:38,883 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 226 transitions. [2024-11-27 23:31:38,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:31:38,884 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 226 transitions. [2024-11-27 23:31:38,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-27 23:31:38,885 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:31:38,885 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:31:38,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-27 23:31:39,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:39,085 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:31:39,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:31:39,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2147324422, now seen corresponding path program 9 times [2024-11-27 23:31:39,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:31:39,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576567832] [2024-11-27 23:31:39,086 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:31:39,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:31:39,158 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:31:39,161 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-27 23:31:39,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:31:39,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576567832] [2024-11-27 23:31:39,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576567832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:31:39,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126401014] [2024-11-27 23:31:39,785 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:31:39,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:39,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:31:39,788 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:31:39,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 23:31:40,046 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:31:40,046 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:40,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-27 23:31:40,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:31:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-27 23:31:42,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:31:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-27 23:31:43,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126401014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:31:43,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:31:43,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2024-11-27 23:31:43,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940663124] [2024-11-27 23:31:43,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:31:43,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-27 23:31:43,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:31:43,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-27 23:31:43,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2024-11-27 23:31:43,828 INFO L87 Difference]: Start difference. First operand 190 states and 226 transitions. Second operand has 39 states, 37 states have (on average 3.864864864864865) internal successors, (143), 39 states have internal predecessors, (143), 6 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-27 23:31:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:31:47,153 INFO L93 Difference]: Finished difference Result 512 states and 615 transitions. [2024-11-27 23:31:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-27 23:31:47,154 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 3.864864864864865) internal successors, (143), 39 states have internal predecessors, (143), 6 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 86 [2024-11-27 23:31:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:31:47,157 INFO L225 Difference]: With dead ends: 512 [2024-11-27 23:31:47,157 INFO L226 Difference]: Without dead ends: 428 [2024-11-27 23:31:47,158 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=492, Invalid=2700, Unknown=0, NotChecked=0, Total=3192 [2024-11-27 23:31:47,158 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 133 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:31:47,159 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 1166 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1567 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-27 23:31:47,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2024-11-27 23:31:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 310. [2024-11-27 23:31:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 297 states have (on average 1.1919191919191918) internal successors, (354), 297 states have internal predecessors, (354), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 23:31:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 374 transitions. [2024-11-27 23:31:47,269 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 374 transitions. Word has length 86 [2024-11-27 23:31:47,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:31:47,269 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 374 transitions. [2024-11-27 23:31:47,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 3.864864864864865) internal successors, (143), 39 states have internal predecessors, (143), 6 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-27 23:31:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 374 transitions. [2024-11-27 23:31:47,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-27 23:31:47,271 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:31:47,271 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:31:47,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-27 23:31:47,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:47,476 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:31:47,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:31:47,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1120989198, now seen corresponding path program 10 times [2024-11-27 23:31:47,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:31:47,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401188886] [2024-11-27 23:31:47,477 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:31:47,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:31:47,505 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:31:47,505 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-27 23:31:47,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:31:47,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401188886] [2024-11-27 23:31:47,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401188886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:31:47,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525273812] [2024-11-27 23:31:47,883 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:31:47,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:47,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:31:47,887 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:31:47,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 23:31:48,119 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:31:48,119 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:48,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 23:31:48,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:31:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-27 23:31:48,404 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:31:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-27 23:31:48,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525273812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:31:48,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:31:48,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2024-11-27 23:31:48,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754000119] [2024-11-27 23:31:48,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:31:48,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 23:31:48,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:31:48,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 23:31:48,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:31:48,744 INFO L87 Difference]: Start difference. First operand 310 states and 374 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:31:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:31:49,702 INFO L93 Difference]: Finished difference Result 511 states and 623 transitions. [2024-11-27 23:31:49,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 23:31:49,702 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 86 [2024-11-27 23:31:49,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:31:49,705 INFO L225 Difference]: With dead ends: 511 [2024-11-27 23:31:49,705 INFO L226 Difference]: Without dead ends: 356 [2024-11-27 23:31:49,705 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 158 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2024-11-27 23:31:49,707 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 50 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:31:49,707 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 623 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 23:31:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-11-27 23:31:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 316. [2024-11-27 23:31:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 303 states have (on average 1.188118811881188) internal successors, (360), 303 states have internal predecessors, (360), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 23:31:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 380 transitions. [2024-11-27 23:31:49,812 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 380 transitions. Word has length 86 [2024-11-27 23:31:49,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:31:49,812 INFO L471 AbstractCegarLoop]: Abstraction has 316 states and 380 transitions. [2024-11-27 23:31:49,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:31:49,812 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 380 transitions. [2024-11-27 23:31:49,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-27 23:31:49,813 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:31:49,813 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:31:49,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-27 23:31:50,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:50,014 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:31:50,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:31:50,015 INFO L85 PathProgramCache]: Analyzing trace with hash 134194166, now seen corresponding path program 11 times [2024-11-27 23:31:50,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:31:50,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496805130] [2024-11-27 23:31:50,015 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:31:50,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:31:50,051 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-27 23:31:50,051 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-27 23:31:50,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:31:50,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496805130] [2024-11-27 23:31:50,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496805130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:31:50,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572826385] [2024-11-27 23:31:50,225 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:31:50,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:50,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:31:50,228 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:31:50,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 23:31:51,209 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-27 23:31:51,209 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:51,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 23:31:51,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:31:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-27 23:31:51,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:31:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-27 23:31:51,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572826385] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:31:51,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:31:51,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2024-11-27 23:31:51,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675900062] [2024-11-27 23:31:51,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:31:51,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:31:51,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:31:51,807 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:31:51,807 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:31:51,807 INFO L87 Difference]: Start difference. First operand 316 states and 380 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:31:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:31:52,364 INFO L93 Difference]: Finished difference Result 407 states and 495 transitions. [2024-11-27 23:31:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:31:52,365 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 88 [2024-11-27 23:31:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:31:52,367 INFO L225 Difference]: With dead ends: 407 [2024-11-27 23:31:52,367 INFO L226 Difference]: Without dead ends: 347 [2024-11-27 23:31:52,368 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2024-11-27 23:31:52,374 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 33 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:31:52,374 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 425 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:31:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2024-11-27 23:31:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 318. [2024-11-27 23:31:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 305 states have (on average 1.1704918032786886) internal successors, (357), 305 states have internal predecessors, (357), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 23:31:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 377 transitions. [2024-11-27 23:31:52,466 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 377 transitions. Word has length 88 [2024-11-27 23:31:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:31:52,466 INFO L471 AbstractCegarLoop]: Abstraction has 318 states and 377 transitions. [2024-11-27 23:31:52,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:31:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 377 transitions. [2024-11-27 23:31:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-27 23:31:52,468 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:31:52,468 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:31:52,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-27 23:31:52,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:52,668 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:31:52,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:31:52,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1920870346, now seen corresponding path program 12 times [2024-11-27 23:31:52,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:31:52,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564025715] [2024-11-27 23:31:52,669 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:31:52,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:31:52,743 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-27 23:31:52,747 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-27 23:31:53,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:31:53,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564025715] [2024-11-27 23:31:53,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564025715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:31:53,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959350842] [2024-11-27 23:31:53,136 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:31:53,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:53,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:31:53,140 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:31:53,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 23:31:53,459 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-27 23:31:53,459 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:53,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 23:31:53,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:31:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-27 23:31:53,651 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:31:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-27 23:31:54,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959350842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:31:54,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:31:54,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 15 [2024-11-27 23:31:54,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316800890] [2024-11-27 23:31:54,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:31:54,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:31:54,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:31:54,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:31:54,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:31:54,019 INFO L87 Difference]: Start difference. First operand 318 states and 377 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:31:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:31:54,387 INFO L93 Difference]: Finished difference Result 383 states and 452 transitions. [2024-11-27 23:31:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:31:54,388 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 88 [2024-11-27 23:31:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:31:54,390 INFO L225 Difference]: With dead ends: 383 [2024-11-27 23:31:54,390 INFO L226 Difference]: Without dead ends: 365 [2024-11-27 23:31:54,390 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 164 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:31:54,390 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 20 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:31:54,391 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 280 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:31:54,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2024-11-27 23:31:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 334. [2024-11-27 23:31:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 321 states have (on average 1.1713395638629283) internal successors, (376), 321 states have internal predecessors, (376), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 23:31:54,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 396 transitions. [2024-11-27 23:31:54,486 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 396 transitions. Word has length 88 [2024-11-27 23:31:54,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:31:54,487 INFO L471 AbstractCegarLoop]: Abstraction has 334 states and 396 transitions. [2024-11-27 23:31:54,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:31:54,487 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 396 transitions. [2024-11-27 23:31:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-27 23:31:54,489 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:31:54,489 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:31:54,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-27 23:31:54,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:54,690 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:31:54,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:31:54,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1097426618, now seen corresponding path program 13 times [2024-11-27 23:31:54,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:31:54,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481905288] [2024-11-27 23:31:54,690 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:31:54,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:31:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:31:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-27 23:31:55,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:31:55,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481905288] [2024-11-27 23:31:55,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481905288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:31:55,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355639672] [2024-11-27 23:31:55,051 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:31:55,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:55,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:31:55,053 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:31:55,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 23:31:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:31:55,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 23:31:55,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:31:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-27 23:31:55,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:31:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-27 23:31:55,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355639672] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:31:55,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:31:55,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2024-11-27 23:31:55,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425479432] [2024-11-27 23:31:55,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:31:55,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 23:31:55,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:31:55,859 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 23:31:55,860 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:31:55,860 INFO L87 Difference]: Start difference. First operand 334 states and 396 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:31:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:31:56,498 INFO L93 Difference]: Finished difference Result 418 states and 492 transitions. [2024-11-27 23:31:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:31:56,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 90 [2024-11-27 23:31:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:31:56,501 INFO L225 Difference]: With dead ends: 418 [2024-11-27 23:31:56,501 INFO L226 Difference]: Without dead ends: 343 [2024-11-27 23:31:56,502 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 167 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:31:56,502 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 45 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:31:56,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 368 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:31:56,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-11-27 23:31:56,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 296. [2024-11-27 23:31:56,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 283 states have (on average 1.1660777385159011) internal successors, (330), 283 states have internal predecessors, (330), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 23:31:56,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 350 transitions. [2024-11-27 23:31:56,616 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 350 transitions. Word has length 90 [2024-11-27 23:31:56,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:31:56,616 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 350 transitions. [2024-11-27 23:31:56,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:31:56,616 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 350 transitions. [2024-11-27 23:31:56,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-27 23:31:56,617 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:31:56,618 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:31:56,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-27 23:31:56,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:56,818 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:31:56,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:31:56,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1346817798, now seen corresponding path program 14 times [2024-11-27 23:31:56,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:31:56,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573758364] [2024-11-27 23:31:56,819 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:31:56,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:31:56,857 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:31:56,857 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-27 23:31:57,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:31:57,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573758364] [2024-11-27 23:31:57,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573758364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:31:57,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349687514] [2024-11-27 23:31:57,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:31:57,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:57,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:31:57,393 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:31:57,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 23:31:57,812 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:31:57,812 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:57,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 23:31:57,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:31:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 35 proven. 20 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-27 23:31:58,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:31:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-27 23:31:59,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349687514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:31:59,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:31:59,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 30 [2024-11-27 23:31:59,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839396088] [2024-11-27 23:31:59,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:31:59,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-27 23:31:59,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:31:59,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-27 23:31:59,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2024-11-27 23:31:59,034 INFO L87 Difference]: Start difference. First operand 296 states and 350 transitions. Second operand has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:31:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:31:59,834 INFO L93 Difference]: Finished difference Result 372 states and 436 transitions. [2024-11-27 23:31:59,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-27 23:31:59,834 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 90 [2024-11-27 23:31:59,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:31:59,836 INFO L225 Difference]: With dead ends: 372 [2024-11-27 23:31:59,836 INFO L226 Difference]: Without dead ends: 270 [2024-11-27 23:31:59,837 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=329, Invalid=1153, Unknown=0, NotChecked=0, Total=1482 [2024-11-27 23:31:59,838 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 20 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:31:59,838 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 367 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:31:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2024-11-27 23:31:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 265. [2024-11-27 23:31:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 252 states have (on average 1.1547619047619047) internal successors, (291), 252 states have internal predecessors, (291), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 23:31:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 311 transitions. [2024-11-27 23:31:59,977 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 311 transitions. Word has length 90 [2024-11-27 23:31:59,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:31:59,978 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 311 transitions. [2024-11-27 23:31:59,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:31:59,978 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 311 transitions. [2024-11-27 23:31:59,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-27 23:31:59,983 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:31:59,983 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:31:59,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-27 23:32:00,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:00,184 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:00,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:00,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1078141644, now seen corresponding path program 15 times [2024-11-27 23:32:00,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:00,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324714588] [2024-11-27 23:32:00,186 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:32:00,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:00,308 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-27 23:32:00,308 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:32:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 78 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:32:33,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:33,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324714588] [2024-11-27 23:32:33,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324714588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:33,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513803874] [2024-11-27 23:32:33,522 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:32:33,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:33,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:33,525 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:33,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ece62e-bd3e-407e-a673-5639c148789f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-27 23:32:34,047 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-27 23:32:34,047 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:32:34,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-11-27 23:32:34,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:34,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:32:34,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 23:32:34,707 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:32:34,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-27 23:32:35,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 23:32:35,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2024-11-27 23:32:35,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2024-11-27 23:32:35,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 49 [2024-11-27 23:32:36,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 52 [2024-11-27 23:32:37,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 54 [2024-11-27 23:32:38,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2024-11-27 23:32:39,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 63 [2024-11-27 23:32:40,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 63 [2024-11-27 23:32:41,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:41,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:41,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:41,431 INFO L349 Elim1Store]: treesize reduction 69, result has 44.4 percent of original size [2024-11-27 23:32:41,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 7 case distinctions, treesize of input 101 treesize of output 123 [2024-11-27 23:32:43,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 64 [2024-11-27 23:32:43,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 66 [2024-11-27 23:32:46,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 39 [2024-11-27 23:32:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 23:32:46,406 INFO L312 TraceCheckSpWp]: Computing backward predicates...