./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i --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_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/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_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/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_2719814d-54a6-407b-a317-da086aa5c07b/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 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:39:23,846 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:39:23,907 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 02:39:23,914 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:39:23,914 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:39:23,952 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:39:23,953 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:39:23,953 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:39:23,953 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:39:23,953 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:39:23,953 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:39:23,954 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:39:23,954 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:39:23,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:39:23,954 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:39:23,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:39:23,954 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 02:39:23,954 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:39:23,955 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:39:23,955 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:39:23,955 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:39:23,955 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 02:39:23,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:39:23,957 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 02:39:23,957 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:39:23,957 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 02:39:23,957 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:39:23,957 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:39:23,957 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:39:23,957 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:39:23,957 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:39:23,957 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:39:23,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:39:23,958 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:39:23,958 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:39:23,958 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:39:23,958 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:39:23,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:39:23,958 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:39:23,958 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:39:23,958 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 02:39:23,958 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 02:39:23,959 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:39:23,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:39:23,959 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:39:23,959 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:39:23,959 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:39:23,959 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:39:23,959 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_2719814d-54a6-407b-a317-da086aa5c07b/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 -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2024-11-28 02:39:24,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:39:24,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:39:24,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:39:24,286 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:39:24,286 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:39:24,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2024-11-28 02:39:27,263 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/data/3d6ee5a3c/09366f80ec2742318ad42721d213aabd/FLAG1f3f43554 [2024-11-28 02:39:27,626 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:39:27,627 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2024-11-28 02:39:27,640 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/data/3d6ee5a3c/09366f80ec2742318ad42721d213aabd/FLAG1f3f43554 [2024-11-28 02:39:27,658 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/data/3d6ee5a3c/09366f80ec2742318ad42721d213aabd [2024-11-28 02:39:27,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:39:27,662 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:39:27,663 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:39:27,663 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:39:27,668 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:39:27,669 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:39:27" (1/1) ... [2024-11-28 02:39:27,670 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27d19ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:27, skipping insertion in model container [2024-11-28 02:39:27,670 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:39:27" (1/1) ... [2024-11-28 02:39:27,703 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:39:27,999 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_2719814d-54a6-407b-a317-da086aa5c07b/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2024-11-28 02:39:28,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:39:28,018 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:39:28,080 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_2719814d-54a6-407b-a317-da086aa5c07b/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2024-11-28 02:39:28,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:39:28,115 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:39:28,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28 WrapperNode [2024-11-28 02:39:28,117 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:39:28,118 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:39:28,118 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:39:28,118 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:39:28,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28" (1/1) ... [2024-11-28 02:39:28,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28" (1/1) ... [2024-11-28 02:39:28,167 INFO L138 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 126 [2024-11-28 02:39:28,167 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:39:28,168 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:39:28,168 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:39:28,168 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:39:28,178 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28" (1/1) ... [2024-11-28 02:39:28,179 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28" (1/1) ... [2024-11-28 02:39:28,182 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28" (1/1) ... [2024-11-28 02:39:28,199 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 5, 6]. 46 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 4 writes are split as follows [0, 1, 3]. [2024-11-28 02:39:28,200 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28" (1/1) ... [2024-11-28 02:39:28,200 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28" (1/1) ... [2024-11-28 02:39:28,208 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28" (1/1) ... [2024-11-28 02:39:28,209 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28" (1/1) ... [2024-11-28 02:39:28,213 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28" (1/1) ... [2024-11-28 02:39:28,214 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28" (1/1) ... [2024-11-28 02:39:28,219 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28" (1/1) ... [2024-11-28 02:39:28,225 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:39:28,226 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:39:28,226 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:39:28,226 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:39:28,227 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28" (1/1) ... [2024-11-28 02:39:28,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:39:28,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:28,265 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:39:28,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:39:28,301 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-11-28 02:39:28,302 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-11-28 02:39:28,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 02:39:28,302 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2024-11-28 02:39:28,302 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2024-11-28 02:39:28,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:39:28,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 02:39:28,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 02:39:28,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-28 02:39:28,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-28 02:39:28,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 02:39:28,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-28 02:39:28,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-28 02:39:28,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 02:39:28,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-28 02:39:28,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-28 02:39:28,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-28 02:39:28,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:39:28,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 02:39:28,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 02:39:28,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:39:28,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:39:28,441 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:39:28,443 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:39:28,467 INFO L727 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-11-28 02:39:28,754 INFO L? ?]: Removed 47 outVars from TransFormulas that were not future-live. [2024-11-28 02:39:28,754 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:39:28,771 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:39:28,772 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 02:39:28,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:39:28 BoogieIcfgContainer [2024-11-28 02:39:28,772 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:39:28,775 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:39:28,775 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:39:28,779 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:39:28,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:39:27" (1/3) ... [2024-11-28 02:39:28,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707b11f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:39:28, skipping insertion in model container [2024-11-28 02:39:28,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:28" (2/3) ... [2024-11-28 02:39:28,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707b11f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:39:28, skipping insertion in model container [2024-11-28 02:39:28,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:39:28" (3/3) ... [2024-11-28 02:39:28,783 INFO L128 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2024-11-28 02:39:28,798 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:39:28,800 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll_nondet_insert-2.i that has 3 procedures, 51 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-28 02:39:28,852 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:39:28,867 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;@31d53dce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:39:28,867 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 02:39:28,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 44 states have internal predecessors, (60), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:39:28,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 02:39:28,880 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:28,880 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:28,881 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:39:28,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:28,886 INFO L85 PathProgramCache]: Analyzing trace with hash -793817800, now seen corresponding path program 1 times [2024-11-28 02:39:28,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:28,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810834683] [2024-11-28 02:39:28,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:28,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:39:29,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:29,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810834683] [2024-11-28 02:39:29,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810834683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:29,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344840490] [2024-11-28 02:39:29,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:29,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:29,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:29,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:29,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:39:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:29,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 02:39:29,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 02:39:29,264 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:39:29,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344840490] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:29,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:39:29,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-28 02:39:29,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378746927] [2024-11-28 02:39:29,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:29,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 02:39:29,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:29,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 02:39:29,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 02:39:29,299 INFO L87 Difference]: Start difference. First operand has 50 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 44 states have internal predecessors, (60), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:39:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:29,321 INFO L93 Difference]: Finished difference Result 97 states and 135 transitions. [2024-11-28 02:39:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 02:39:29,325 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2024-11-28 02:39:29,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:29,331 INFO L225 Difference]: With dead ends: 97 [2024-11-28 02:39:29,331 INFO L226 Difference]: Without dead ends: 40 [2024-11-28 02:39:29,335 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 02:39:29,338 INFO L435 NwaCegarLoop]: 61 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, 61 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 [2024-11-28 02:39:29,339 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:39:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-28 02:39:29,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-28 02:39:29,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:39:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-11-28 02:39:29,383 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 26 [2024-11-28 02:39:29,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:29,384 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-11-28 02:39:29,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:39:29,384 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-11-28 02:39:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 02:39:29,386 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:29,386 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:29,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 02:39:29,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-28 02:39:29,588 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:39:29,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:29,589 INFO L85 PathProgramCache]: Analyzing trace with hash 113449992, now seen corresponding path program 1 times [2024-11-28 02:39:29,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:29,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210951942] [2024-11-28 02:39:29,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:29,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:39:30,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:30,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210951942] [2024-11-28 02:39:30,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210951942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:30,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529969793] [2024-11-28 02:39:30,063 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:30,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:30,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:30,066 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:30,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:39:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:30,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:39:30,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:30,338 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:39:30,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529969793] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:30,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:39:30,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-11-28 02:39:30,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151012416] [2024-11-28 02:39:30,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:30,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:39:30,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:30,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:39:30,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:39:30,345 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:39:30,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:30,434 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2024-11-28 02:39:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:39:30,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2024-11-28 02:39:30,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:30,436 INFO L225 Difference]: With dead ends: 73 [2024-11-28 02:39:30,436 INFO L226 Difference]: Without dead ends: 42 [2024-11-28 02:39:30,437 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:39:30,437 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:30,438 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 217 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-28 02:39:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-28 02:39:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:39:30,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-11-28 02:39:30,445 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2024-11-28 02:39:30,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:30,446 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-11-28 02:39:30,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:39:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-11-28 02:39:30,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 02:39:30,448 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:30,448 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] [2024-11-28 02:39:30,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 02:39:30,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:30,652 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:39:30,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:30,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1647093696, now seen corresponding path program 1 times [2024-11-28 02:39:30,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:30,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178608724] [2024-11-28 02:39:30,653 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:30,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:39:30,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:30,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178608724] [2024-11-28 02:39:30,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178608724] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:30,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:30,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 02:39:30,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887571182] [2024-11-28 02:39:30,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:30,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:39:30,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:30,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:39:30,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:39:30,892 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:39:31,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:31,019 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-11-28 02:39:31,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:39:31,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2024-11-28 02:39:31,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:31,021 INFO L225 Difference]: With dead ends: 71 [2024-11-28 02:39:31,021 INFO L226 Difference]: Without dead ends: 66 [2024-11-28 02:39:31,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:39:31,022 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 25 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:31,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 231 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:31,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-28 02:39:31,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2024-11-28 02:39:31,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 02:39:31,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2024-11-28 02:39:31,030 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 36 [2024-11-28 02:39:31,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:31,030 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2024-11-28 02:39:31,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:39:31,031 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2024-11-28 02:39:31,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 02:39:31,032 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:31,032 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] [2024-11-28 02:39:31,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:39:31,032 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:39:31,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:31,033 INFO L85 PathProgramCache]: Analyzing trace with hash 88813052, now seen corresponding path program 1 times [2024-11-28 02:39:31,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:31,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27353879] [2024-11-28 02:39:31,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:31,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:39:31,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27353879] [2024-11-28 02:39:31,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27353879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970406960] [2024-11-28 02:39:31,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:31,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:31,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:31,275 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:31,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:39:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:31,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:39:31,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:39:31,472 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:39:31,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970406960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:31,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:31,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-11-28 02:39:31,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222510159] [2024-11-28 02:39:31,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:31,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 02:39:31,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:31,737 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 02:39:31,738 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:39:31,738 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:39:31,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:31,971 INFO L93 Difference]: Finished difference Result 125 states and 157 transitions. [2024-11-28 02:39:31,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 02:39:31,973 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-11-28 02:39:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:31,975 INFO L225 Difference]: With dead ends: 125 [2024-11-28 02:39:31,977 INFO L226 Difference]: Without dead ends: 81 [2024-11-28 02:39:31,978 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-11-28 02:39:31,980 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:31,981 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 350 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-28 02:39:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2024-11-28 02:39:31,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 02:39:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2024-11-28 02:39:31,997 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 38 [2024-11-28 02:39:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:31,997 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2024-11-28 02:39:31,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:39:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2024-11-28 02:39:31,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 02:39:31,999 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:31,999 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:32,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 02:39:32,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:32,201 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:39:32,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:32,201 INFO L85 PathProgramCache]: Analyzing trace with hash -603897148, now seen corresponding path program 2 times [2024-11-28 02:39:32,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:32,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71966304] [2024-11-28 02:39:32,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:39:32,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:32,240 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:39:32,241 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:39:32,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71966304] [2024-11-28 02:39:32,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71966304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47179644] [2024-11-28 02:39:32,601 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:39:32,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:32,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:32,607 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:32,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:39:32,721 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:39:32,722 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:32,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 02:39:32,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:32,807 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 15 treesize of output 1 [2024-11-28 02:39:33,095 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 20 treesize of output 12 [2024-11-28 02:39:33,131 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 16 treesize of output 8 [2024-11-28 02:39:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:33,135 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:33,170 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 25 treesize of output 17 [2024-11-28 02:39:33,174 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 21 treesize of output 13 [2024-11-28 02:39:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:39:33,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47179644] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:33,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:33,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 15 [2024-11-28 02:39:33,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383955812] [2024-11-28 02:39:33,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:33,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 02:39:33,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:33,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 02:39:33,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:39:33,209 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:39:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:33,504 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2024-11-28 02:39:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 02:39:33,505 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2024-11-28 02:39:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:33,506 INFO L225 Difference]: With dead ends: 97 [2024-11-28 02:39:33,506 INFO L226 Difference]: Without dead ends: 92 [2024-11-28 02:39:33,506 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:39:33,507 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 51 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:33,507 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 450 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:39:33,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-28 02:39:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 73. [2024-11-28 02:39:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.2) internal successors, (78), 66 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 02:39:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2024-11-28 02:39:33,517 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 43 [2024-11-28 02:39:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:33,517 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2024-11-28 02:39:33,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:39:33,518 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2024-11-28 02:39:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 02:39:33,519 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:33,519 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:33,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 02:39:33,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:33,719 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:39:33,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:33,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1873315712, now seen corresponding path program 3 times [2024-11-28 02:39:33,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:33,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145392984] [2024-11-28 02:39:33,720 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:39:33,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:33,745 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:39:33,745 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:39:34,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:34,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145392984] [2024-11-28 02:39:34,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145392984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:34,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022950869] [2024-11-28 02:39:34,176 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:39:34,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:34,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:34,181 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:34,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:39:34,310 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:39:34,311 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:34,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 02:39:34,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:39:34,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:39:35,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022950869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:35,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:35,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 28 [2024-11-28 02:39:35,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678379391] [2024-11-28 02:39:35,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:35,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 02:39:35,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:35,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 02:39:35,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:39:35,020 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:39:35,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:35,476 INFO L93 Difference]: Finished difference Result 200 states and 259 transitions. [2024-11-28 02:39:35,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 02:39:35,478 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2024-11-28 02:39:35,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:35,480 INFO L225 Difference]: With dead ends: 200 [2024-11-28 02:39:35,480 INFO L226 Difference]: Without dead ends: 195 [2024-11-28 02:39:35,481 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2024-11-28 02:39:35,482 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 77 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:35,485 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 806 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:39:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-28 02:39:35,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 135. [2024-11-28 02:39:35,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 121 states have (on average 1.2231404958677685) internal successors, (148), 124 states have internal predecessors, (148), 9 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2024-11-28 02:39:35,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 175 transitions. [2024-11-28 02:39:35,523 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 175 transitions. Word has length 45 [2024-11-28 02:39:35,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:35,524 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 175 transitions. [2024-11-28 02:39:35,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:39:35,524 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 175 transitions. [2024-11-28 02:39:35,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 02:39:35,525 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:35,525 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:35,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 02:39:35,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:35,726 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:39:35,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:35,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1231975108, now seen corresponding path program 4 times [2024-11-28 02:39:35,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:35,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403489291] [2024-11-28 02:39:35,727 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:39:35,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:35,773 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:39:35,775 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:39:36,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:36,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403489291] [2024-11-28 02:39:36,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403489291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:36,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855433296] [2024-11-28 02:39:36,584 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:39:36,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:36,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:36,589 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:36,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:39:36,705 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:39:36,705 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:36,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-28 02:39:36,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:36,736 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 [2024-11-28 02:39:36,810 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 [2024-11-28 02:39:36,815 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 [2024-11-28 02:39:36,888 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:39:36,888 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 [2024-11-28 02:39:36,959 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 23 treesize of output 22 [2024-11-28 02:39:36,972 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 27 treesize of output 15 [2024-11-28 02:39:37,520 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 65 treesize of output 41 [2024-11-28 02:39:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:37,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:37,787 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 72 treesize of output 52 [2024-11-28 02:39:37,792 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 56 treesize of output 36 [2024-11-28 02:39:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:39:50,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855433296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:50,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:50,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 24 [2024-11-28 02:39:50,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701378934] [2024-11-28 02:39:50,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:50,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 02:39:50,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:50,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 02:39:50,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=487, Unknown=3, NotChecked=0, Total=552 [2024-11-28 02:39:50,534 INFO L87 Difference]: Start difference. First operand 135 states and 175 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:39:51,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:51,505 INFO L93 Difference]: Finished difference Result 215 states and 271 transitions. [2024-11-28 02:39:51,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 02:39:51,505 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2024-11-28 02:39:51,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:51,508 INFO L225 Difference]: With dead ends: 215 [2024-11-28 02:39:51,510 INFO L226 Difference]: Without dead ends: 202 [2024-11-28 02:39:51,510 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=90, Invalid=663, Unknown=3, NotChecked=0, Total=756 [2024-11-28 02:39:51,511 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 29 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:51,513 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 711 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:39:51,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-28 02:39:51,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 177. [2024-11-28 02:39:51,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 157 states have (on average 1.21656050955414) internal successors, (191), 163 states have internal predecessors, (191), 13 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (26), 10 states have call predecessors, (26), 13 states have call successors, (26) [2024-11-28 02:39:51,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 230 transitions. [2024-11-28 02:39:51,553 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 230 transitions. Word has length 47 [2024-11-28 02:39:51,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:51,554 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 230 transitions. [2024-11-28 02:39:51,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:39:51,554 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 230 transitions. [2024-11-28 02:39:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 02:39:51,556 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:51,560 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:51,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:39:51,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:51,761 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:39:51,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:51,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1374071879, now seen corresponding path program 1 times [2024-11-28 02:39:51,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:51,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844280161] [2024-11-28 02:39:51,761 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:51,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 02:39:52,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:52,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844280161] [2024-11-28 02:39:52,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844280161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:52,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900640296] [2024-11-28 02:39:52,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:52,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:52,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:52,134 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:52,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:39:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:52,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:39:52,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 02:39:52,440 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 02:39:52,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900640296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:52,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:52,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2024-11-28 02:39:52,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058838693] [2024-11-28 02:39:52,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:52,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:39:52,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:52,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:39:52,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:39:52,891 INFO L87 Difference]: Start difference. First operand 177 states and 230 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:39:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:53,431 INFO L93 Difference]: Finished difference Result 260 states and 334 transitions. [2024-11-28 02:39:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:39:53,432 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2024-11-28 02:39:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:53,435 INFO L225 Difference]: With dead ends: 260 [2024-11-28 02:39:53,435 INFO L226 Difference]: Without dead ends: 188 [2024-11-28 02:39:53,436 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-11-28 02:39:53,437 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 38 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:53,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 557 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:39:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-28 02:39:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 174. [2024-11-28 02:39:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 155 states have (on average 1.2129032258064516) internal successors, (188), 160 states have internal predecessors, (188), 12 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (24), 10 states have call predecessors, (24), 12 states have call successors, (24) [2024-11-28 02:39:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 224 transitions. [2024-11-28 02:39:53,469 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 224 transitions. Word has length 49 [2024-11-28 02:39:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:53,469 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 224 transitions. [2024-11-28 02:39:53,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:39:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 224 transitions. [2024-11-28 02:39:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 02:39:53,471 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:53,471 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:53,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:39:53,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:53,672 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:39:53,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1873016089, now seen corresponding path program 2 times [2024-11-28 02:39:53,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:53,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044442668] [2024-11-28 02:39:53,672 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:39:53,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:53,695 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:39:53,695 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 02:39:53,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:53,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044442668] [2024-11-28 02:39:53,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044442668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:53,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708682722] [2024-11-28 02:39:53,923 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:39:53,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:53,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:53,926 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:53,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:39:54,041 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:39:54,041 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:54,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:39:54,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 02:39:54,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 02:39:55,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708682722] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:55,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:55,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2024-11-28 02:39:55,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081763811] [2024-11-28 02:39:55,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:55,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 02:39:55,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:55,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 02:39:55,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:39:55,176 INFO L87 Difference]: Start difference. First operand 174 states and 224 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 19 states have internal predecessors, (80), 2 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 02:39:56,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:56,044 INFO L93 Difference]: Finished difference Result 355 states and 472 transitions. [2024-11-28 02:39:56,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 02:39:56,045 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 19 states have internal predecessors, (80), 2 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2024-11-28 02:39:56,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:56,049 INFO L225 Difference]: With dead ends: 355 [2024-11-28 02:39:56,051 INFO L226 Difference]: Without dead ends: 266 [2024-11-28 02:39:56,053 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 02:39:56,055 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 141 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:56,055 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 546 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:39:56,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-11-28 02:39:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 200. [2024-11-28 02:39:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 177 states have (on average 1.2372881355932204) internal successors, (219), 183 states have internal predecessors, (219), 13 states have call successors, (13), 4 states have call predecessors, (13), 9 states have return successors, (30), 12 states have call predecessors, (30), 13 states have call successors, (30) [2024-11-28 02:39:56,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 262 transitions. [2024-11-28 02:39:56,088 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 262 transitions. Word has length 49 [2024-11-28 02:39:56,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:56,088 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 262 transitions. [2024-11-28 02:39:56,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 19 states have internal predecessors, (80), 2 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 02:39:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 262 transitions. [2024-11-28 02:39:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 02:39:56,090 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:56,090 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:56,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 02:39:56,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 02:39:56,295 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:39:56,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:56,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1563272844, now seen corresponding path program 5 times [2024-11-28 02:39:56,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:56,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495125146] [2024-11-28 02:39:56,296 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:39:56,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:56,323 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 02:39:56,324 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:39:56,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:56,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495125146] [2024-11-28 02:39:56,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495125146] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:56,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719176355] [2024-11-28 02:39:56,566 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:39:56,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:56,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:56,568 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:56,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:39:56,727 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 02:39:56,728 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:56,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:39:56,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 02:39:56,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:39:57,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719176355] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:57,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:57,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2024-11-28 02:39:57,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075961269] [2024-11-28 02:39:57,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:57,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:39:57,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:57,085 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:39:57,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:39:57,085 INFO L87 Difference]: Start difference. First operand 200 states and 262 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:39:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:57,376 INFO L93 Difference]: Finished difference Result 315 states and 413 transitions. [2024-11-28 02:39:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:39:57,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2024-11-28 02:39:57,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:57,380 INFO L225 Difference]: With dead ends: 315 [2024-11-28 02:39:57,380 INFO L226 Difference]: Without dead ends: 196 [2024-11-28 02:39:57,381 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:39:57,383 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 21 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:57,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 400 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:39:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-28 02:39:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 175. [2024-11-28 02:39:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 156 states have (on average 1.2307692307692308) internal successors, (192), 160 states have internal predecessors, (192), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2024-11-28 02:39:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 223 transitions. [2024-11-28 02:39:57,407 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 223 transitions. Word has length 52 [2024-11-28 02:39:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:57,408 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 223 transitions. [2024-11-28 02:39:57,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:39:57,409 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 223 transitions. [2024-11-28 02:39:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 02:39:57,410 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:57,410 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:57,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 02:39:57,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 02:39:57,615 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:39:57,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1158803743, now seen corresponding path program 3 times [2024-11-28 02:39:57,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:57,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792127502] [2024-11-28 02:39:57,615 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:39:57,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:57,651 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 02:39:57,651 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:39:58,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:58,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792127502] [2024-11-28 02:39:58,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792127502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:58,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469996418] [2024-11-28 02:39:58,328 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:39:58,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:58,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:58,330 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:58,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:39:58,470 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 02:39:58,470 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:58,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-28 02:39:58,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:58,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 02:39:58,779 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2024-11-28 02:39:58,779 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 1 case distinctions, treesize of input 28 treesize of output 24 [2024-11-28 02:39:58,799 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 [2024-11-28 02:39:59,414 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 47 treesize of output 31 [2024-11-28 02:39:59,518 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 7 treesize of output 3 [2024-11-28 02:39:59,649 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:39:59,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2024-11-28 02:39:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 02:39:59,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:59,720 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 41 treesize of output 29 [2024-11-28 02:39:59,725 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 33 treesize of output 21 [2024-11-28 02:40:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:40:00,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469996418] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:00,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:00,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 25 [2024-11-28 02:40:00,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901667545] [2024-11-28 02:40:00,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:00,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:40:00,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:00,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:40:00,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:40:00,036 INFO L87 Difference]: Start difference. First operand 175 states and 223 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:40:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:01,206 INFO L93 Difference]: Finished difference Result 202 states and 251 transitions. [2024-11-28 02:40:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:40:01,207 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 54 [2024-11-28 02:40:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:01,208 INFO L225 Difference]: With dead ends: 202 [2024-11-28 02:40:01,208 INFO L226 Difference]: Without dead ends: 197 [2024-11-28 02:40:01,209 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 02:40:01,210 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 77 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:01,210 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1102 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:40:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-28 02:40:01,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 177. [2024-11-28 02:40:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 158 states have (on average 1.2278481012658229) internal successors, (194), 162 states have internal predecessors, (194), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2024-11-28 02:40:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 225 transitions. [2024-11-28 02:40:01,239 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 225 transitions. Word has length 54 [2024-11-28 02:40:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:01,239 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 225 transitions. [2024-11-28 02:40:01,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:40:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 225 transitions. [2024-11-28 02:40:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 02:40:01,242 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:01,242 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:01,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:40:01,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 02:40:01,446 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:40:01,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:01,447 INFO L85 PathProgramCache]: Analyzing trace with hash -683209957, now seen corresponding path program 4 times [2024-11-28 02:40:01,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:01,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400088849] [2024-11-28 02:40:01,447 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:40:01,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:01,482 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:40:01,482 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 02:40:02,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:02,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400088849] [2024-11-28 02:40:02,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400088849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:02,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886826091] [2024-11-28 02:40:02,089 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:40:02,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:02,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:02,093 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:02,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:40:02,236 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:40:02,236 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:02,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 02:40:02,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 02:40:02,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 02:40:03,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886826091] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:03,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:03,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 34 [2024-11-28 02:40:03,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962389967] [2024-11-28 02:40:03,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:03,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 02:40:03,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:03,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 02:40:03,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 02:40:03,430 INFO L87 Difference]: Start difference. First operand 177 states and 225 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 31 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:40:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:04,808 INFO L93 Difference]: Finished difference Result 329 states and 438 transitions. [2024-11-28 02:40:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:40:04,811 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 31 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-11-28 02:40:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:04,814 INFO L225 Difference]: With dead ends: 329 [2024-11-28 02:40:04,817 INFO L226 Difference]: Without dead ends: 324 [2024-11-28 02:40:04,818 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 02:40:04,818 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 112 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:04,819 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1715 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 02:40:04,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2024-11-28 02:40:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 235. [2024-11-28 02:40:04,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 211 states have (on average 1.2132701421800949) internal successors, (256), 216 states have internal predecessors, (256), 14 states have call successors, (14), 4 states have call predecessors, (14), 9 states have return successors, (24), 14 states have call predecessors, (24), 14 states have call successors, (24) [2024-11-28 02:40:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 294 transitions. [2024-11-28 02:40:04,864 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 294 transitions. Word has length 56 [2024-11-28 02:40:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:04,865 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 294 transitions. [2024-11-28 02:40:04,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 31 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:40:04,866 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 294 transitions. [2024-11-28 02:40:04,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 02:40:04,870 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:04,870 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:04,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 02:40:05,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:05,074 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:40:05,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:05,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1525198479, now seen corresponding path program 1 times [2024-11-28 02:40:05,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:05,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058455997] [2024-11-28 02:40:05,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:40:05,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:40:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:40:05,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:05,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058455997] [2024-11-28 02:40:05,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058455997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:05,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307817401] [2024-11-28 02:40:05,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:40:05,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:05,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:05,245 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:05,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:40:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:40:05,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:40:05,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:40:05,497 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:40:05,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307817401] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:40:05,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:40:05,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-11-28 02:40:05,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836290227] [2024-11-28 02:40:05,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:40:05,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:40:05,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:05,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:40:05,499 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:40:05,499 INFO L87 Difference]: Start difference. First operand 235 states and 294 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 02:40:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:05,632 INFO L93 Difference]: Finished difference Result 322 states and 401 transitions. [2024-11-28 02:40:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:40:05,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2024-11-28 02:40:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:05,637 INFO L225 Difference]: With dead ends: 322 [2024-11-28 02:40:05,637 INFO L226 Difference]: Without dead ends: 177 [2024-11-28 02:40:05,638 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:40:05,638 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:05,640 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 188 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:40:05,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-28 02:40:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-11-28 02:40:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 155 states have internal predecessors, (175), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-28 02:40:05,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 197 transitions. [2024-11-28 02:40:05,671 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 197 transitions. Word has length 58 [2024-11-28 02:40:05,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:05,671 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 197 transitions. [2024-11-28 02:40:05,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 02:40:05,671 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 197 transitions. [2024-11-28 02:40:05,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 02:40:05,675 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:05,675 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:05,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 02:40:05,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 02:40:05,876 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:40:05,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:05,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1331849705, now seen corresponding path program 5 times [2024-11-28 02:40:05,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:05,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252120295] [2024-11-28 02:40:05,876 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:40:05,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:05,904 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 02:40:05,904 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:40:07,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:07,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252120295] [2024-11-28 02:40:07,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252120295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:07,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997766376] [2024-11-28 02:40:07,516 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:40:07,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:07,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:07,520 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:07,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:40:07,676 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 02:40:07,676 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:07,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-28 02:40:07,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:07,712 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 [2024-11-28 02:40:07,746 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 [2024-11-28 02:40:07,758 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 [2024-11-28 02:40:07,827 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-28 02:40:07,827 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 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-28 02:40:07,944 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 27 treesize of output 15 [2024-11-28 02:40:07,965 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 23 treesize of output 22 [2024-11-28 02:40:08,121 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-28 02:40:08,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-28 02:40:08,265 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-28 02:40:08,266 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 44 [2024-11-28 02:40:08,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2024-11-28 02:40:09,110 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 116 treesize of output 80 [2024-11-28 02:40:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 02:40:09,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:09,988 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 136 treesize of output 100 [2024-11-28 02:40:09,993 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 104 treesize of output 68 [2024-11-28 02:40:14,366 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_56| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_56|) 0)) (= (select (let ((.cse0 (store |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_56| (store (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_56|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select (store |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_56| (store (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_56|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) 0))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_56| Int)) (or (= (let ((.cse1 (store |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_56| (store (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_56|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (select (select .cse1 (select (select (store |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_56| (store (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_56|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (select (select .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_56|) 0))))) is different from false [2024-11-28 02:40:19,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:40:19,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2330 treesize of output 2082 [2024-11-28 02:40:19,992 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:40:19,996 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 4598 treesize of output 4342 [2024-11-28 02:40:20,020 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:40:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 8 not checked. [2024-11-28 02:40:21,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997766376] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:21,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:21,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 40 [2024-11-28 02:40:21,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615113909] [2024-11-28 02:40:21,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:21,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 02:40:21,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:21,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 02:40:21,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1374, Unknown=2, NotChecked=74, Total=1560 [2024-11-28 02:40:21,147 INFO L87 Difference]: Start difference. First operand 169 states and 197 transitions. Second operand has 40 states, 40 states have (on average 2.55) internal successors, (102), 40 states have internal predecessors, (102), 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) [2024-11-28 02:40:56,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:56,856 INFO L93 Difference]: Finished difference Result 247 states and 286 transitions. [2024-11-28 02:40:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:40:56,857 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.55) internal successors, (102), 40 states have internal predecessors, (102), 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) Word has length 58 [2024-11-28 02:40:56,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:56,858 INFO L225 Difference]: With dead ends: 247 [2024-11-28 02:40:56,858 INFO L226 Difference]: Without dead ends: 230 [2024-11-28 02:40:56,859 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=187, Invalid=1977, Unknown=2, NotChecked=90, Total=2256 [2024-11-28 02:40:56,860 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 72 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:56,860 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1420 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 736 Invalid, 0 Unknown, 69 Unchecked, 1.3s Time] [2024-11-28 02:40:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-28 02:40:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 212. [2024-11-28 02:40:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 190 states have (on average 1.1526315789473685) internal successors, (219), 195 states have internal predecessors, (219), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-28 02:40:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 249 transitions. [2024-11-28 02:40:56,887 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 249 transitions. Word has length 58 [2024-11-28 02:40:56,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:56,887 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 249 transitions. [2024-11-28 02:40:56,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.55) internal successors, (102), 40 states have internal predecessors, (102), 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) [2024-11-28 02:40:56,887 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 249 transitions. [2024-11-28 02:40:56,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-28 02:40:56,889 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:56,889 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:56,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 02:40:57,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 02:40:57,089 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:40:57,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2032963906, now seen corresponding path program 6 times [2024-11-28 02:40:57,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:57,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586451351] [2024-11-28 02:40:57,090 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:40:57,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:57,126 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 02:40:57,126 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:40:57,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:57,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586451351] [2024-11-28 02:40:57,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586451351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:57,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690360021] [2024-11-28 02:40:57,437 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:40:57,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:57,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:57,439 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:57,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:40:57,592 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 02:40:57,592 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:57,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 02:40:57,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 02:40:57,765 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:40:58,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690360021] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:58,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:58,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2024-11-28 02:40:58,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542169364] [2024-11-28 02:40:58,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:58,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:40:58,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:58,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:40:58,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:40:58,137 INFO L87 Difference]: Start difference. First operand 212 states and 249 transitions. Second operand has 20 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:40:58,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:58,668 INFO L93 Difference]: Finished difference Result 298 states and 360 transitions. [2024-11-28 02:40:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:40:58,669 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2024-11-28 02:40:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:58,671 INFO L225 Difference]: With dead ends: 298 [2024-11-28 02:40:58,671 INFO L226 Difference]: Without dead ends: 228 [2024-11-28 02:40:58,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 110 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:40:58,672 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 33 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:58,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 740 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:40:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-11-28 02:40:58,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 199. [2024-11-28 02:40:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 178 states have (on average 1.1573033707865168) internal successors, (206), 183 states have internal predecessors, (206), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2024-11-28 02:40:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 233 transitions. [2024-11-28 02:40:58,699 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 233 transitions. Word has length 60 [2024-11-28 02:40:58,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:58,699 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 233 transitions. [2024-11-28 02:40:58,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:40:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 233 transitions. [2024-11-28 02:40:58,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 02:40:58,701 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:58,701 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:58,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 02:40:58,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 02:40:58,905 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:40:58,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:58,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1797815866, now seen corresponding path program 1 times [2024-11-28 02:40:58,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:58,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658859203] [2024-11-28 02:40:58,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:40:58,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:40:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-28 02:40:59,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:59,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658859203] [2024-11-28 02:40:59,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658859203] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:40:59,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:40:59,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:40:59,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859851952] [2024-11-28 02:40:59,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:40:59,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:40:59,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:59,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:40:59,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:40:59,095 INFO L87 Difference]: Start difference. First operand 199 states and 233 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 02:40:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:59,262 INFO L93 Difference]: Finished difference Result 213 states and 247 transitions. [2024-11-28 02:40:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:40:59,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2024-11-28 02:40:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:59,265 INFO L225 Difference]: With dead ends: 213 [2024-11-28 02:40:59,265 INFO L226 Difference]: Without dead ends: 208 [2024-11-28 02:40:59,265 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:40:59,266 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 23 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:59,266 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 186 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:40:59,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-28 02:40:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 187. [2024-11-28 02:40:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 167 states have (on average 1.1497005988023952) internal successors, (192), 172 states have internal predecessors, (192), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2024-11-28 02:40:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 217 transitions. [2024-11-28 02:40:59,290 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 217 transitions. Word has length 62 [2024-11-28 02:40:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:59,290 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 217 transitions. [2024-11-28 02:40:59,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 02:40:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 217 transitions. [2024-11-28 02:40:59,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 02:40:59,291 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:59,291 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:59,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 02:40:59,292 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:40:59,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:59,292 INFO L85 PathProgramCache]: Analyzing trace with hash -800543887, now seen corresponding path program 7 times [2024-11-28 02:40:59,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:59,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839022757] [2024-11-28 02:40:59,293 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:40:59,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:40:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 02:40:59,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:59,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839022757] [2024-11-28 02:40:59,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839022757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:59,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877912245] [2024-11-28 02:40:59,598 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:40:59,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:59,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:59,602 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:59,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:40:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:40:59,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 02:40:59,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:40:59,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 02:41:00,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877912245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:00,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:00,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-28 02:41:00,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427637560] [2024-11-28 02:41:00,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:00,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 02:41:00,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:00,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 02:41:00,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-28 02:41:00,262 INFO L87 Difference]: Start difference. First operand 187 states and 217 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:41:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:00,629 INFO L93 Difference]: Finished difference Result 265 states and 314 transitions. [2024-11-28 02:41:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:41:00,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2024-11-28 02:41:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:00,631 INFO L225 Difference]: With dead ends: 265 [2024-11-28 02:41:00,631 INFO L226 Difference]: Without dead ends: 203 [2024-11-28 02:41:00,631 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-11-28 02:41:00,632 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 31 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:00,632 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 536 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:41:00,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-28 02:41:00,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 174. [2024-11-28 02:41:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 155 states have (on average 1.1483870967741936) internal successors, (178), 160 states have internal predecessors, (178), 8 states have call successors, (8), 5 states have call predecessors, (8), 10 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-28 02:41:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 200 transitions. [2024-11-28 02:41:00,657 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 200 transitions. Word has length 63 [2024-11-28 02:41:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:00,657 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 200 transitions. [2024-11-28 02:41:00,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:41:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 200 transitions. [2024-11-28 02:41:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 02:41:00,658 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:00,659 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:00,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 02:41:00,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 02:41:00,862 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:00,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:00,863 INFO L85 PathProgramCache]: Analyzing trace with hash 572631168, now seen corresponding path program 1 times [2024-11-28 02:41:00,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:00,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036399046] [2024-11-28 02:41:00,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:00,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-28 02:41:00,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:00,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036399046] [2024-11-28 02:41:00,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036399046] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:00,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:00,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:41:00,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589916593] [2024-11-28 02:41:00,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:00,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:41:00,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:00,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:41:00,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:41:00,919 INFO L87 Difference]: Start difference. First operand 174 states and 200 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 02:41:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:00,954 INFO L93 Difference]: Finished difference Result 207 states and 240 transitions. [2024-11-28 02:41:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:41:00,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2024-11-28 02:41:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:00,956 INFO L225 Difference]: With dead ends: 207 [2024-11-28 02:41:00,956 INFO L226 Difference]: Without dead ends: 179 [2024-11-28 02:41:00,956 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:41:00,957 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:00,957 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:41:00,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-28 02:41:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2024-11-28 02:41:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 159 states have (on average 1.150943396226415) internal successors, (183), 164 states have internal predecessors, (183), 8 states have call successors, (8), 5 states have call predecessors, (8), 10 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-28 02:41:00,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 205 transitions. [2024-11-28 02:41:00,983 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 205 transitions. Word has length 64 [2024-11-28 02:41:00,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:00,984 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 205 transitions. [2024-11-28 02:41:00,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 02:41:00,984 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 205 transitions. [2024-11-28 02:41:00,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 02:41:00,985 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:00,985 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:00,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 02:41:00,985 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:00,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:00,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1273695746, now seen corresponding path program 1 times [2024-11-28 02:41:00,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:00,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137413384] [2024-11-28 02:41:00,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:00,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-28 02:41:01,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:01,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137413384] [2024-11-28 02:41:01,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137413384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:01,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945496233] [2024-11-28 02:41:01,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:01,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:01,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:01,522 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:01,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:41:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:01,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-28 02:41:01,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:02,098 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 15 treesize of output 11 [2024-11-28 02:41:02,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 39 treesize of output 16 [2024-11-28 02:41:02,152 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 [2024-11-28 02:41:02,198 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 20 treesize of output 12 [2024-11-28 02:41:02,242 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 16 treesize of output 8 [2024-11-28 02:41:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:41:02,244 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:02,263 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 62 treesize of output 58 [2024-11-28 02:41:02,337 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 42 treesize of output 34 [2024-11-28 02:41:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-28 02:41:02,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945496233] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:02,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:02,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2024-11-28 02:41:02,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929527583] [2024-11-28 02:41:02,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:02,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 02:41:02,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:02,426 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 02:41:02,426 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-28 02:41:02,426 INFO L87 Difference]: Start difference. First operand 178 states and 205 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:41:06,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:41:10,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:41:14,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:41:18,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:41:22,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:41:26,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:41:30,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:41:30,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:30,949 INFO L93 Difference]: Finished difference Result 243 states and 280 transitions. [2024-11-28 02:41:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 02:41:30,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2024-11-28 02:41:30,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:30,953 INFO L225 Difference]: With dead ends: 243 [2024-11-28 02:41:30,953 INFO L226 Difference]: Without dead ends: 238 [2024-11-28 02:41:30,953 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2024-11-28 02:41:30,954 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 78 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 3 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:30,954 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 659 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 359 Invalid, 7 Unknown, 0 Unchecked, 28.4s Time] [2024-11-28 02:41:30,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-28 02:41:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 204. [2024-11-28 02:41:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 183 states have (on average 1.169398907103825) internal successors, (214), 188 states have internal predecessors, (214), 9 states have call successors, (9), 6 states have call predecessors, (9), 11 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2024-11-28 02:41:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 238 transitions. [2024-11-28 02:41:30,980 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 238 transitions. Word has length 64 [2024-11-28 02:41:30,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:30,980 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 238 transitions. [2024-11-28 02:41:30,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:41:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 238 transitions. [2024-11-28 02:41:30,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-28 02:41:30,981 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:30,982 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:30,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 02:41:31,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:31,182 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:31,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:31,183 INFO L85 PathProgramCache]: Analyzing trace with hash 649521454, now seen corresponding path program 8 times [2024-11-28 02:41:31,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:31,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264391816] [2024-11-28 02:41:31,183 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:41:31,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:31,204 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:41:31,204 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 02:41:32,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:32,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264391816] [2024-11-28 02:41:32,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264391816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:32,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280179580] [2024-11-28 02:41:32,278 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:41:32,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:32,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:32,280 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:32,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 02:41:32,438 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:41:32,438 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:32,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-28 02:41:32,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:32,463 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 [2024-11-28 02:41:32,497 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 15 treesize of output 1 [2024-11-28 02:41:32,553 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-28 02:41:32,553 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 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-28 02:41:32,655 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 28 treesize of output 16 [2024-11-28 02:41:32,668 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 [2024-11-28 02:41:32,773 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-28 02:41:32,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-28 02:41:32,888 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 23 treesize of output 22 [2024-11-28 02:41:32,915 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-28 02:41:32,915 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 38 [2024-11-28 02:41:33,569 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 98 treesize of output 66 [2024-11-28 02:41:33,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:41:33,806 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 19 treesize of output 7 [2024-11-28 02:41:33,945 INFO L349 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2024-11-28 02:41:33,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 26 [2024-11-28 02:41:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:41:33,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:34,141 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 73 treesize of output 53 [2024-11-28 02:41:34,145 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 57 treesize of output 37 [2024-11-28 02:41:34,878 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:41:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 02:41:35,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280179580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:35,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:35,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 36 [2024-11-28 02:41:35,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480559061] [2024-11-28 02:41:35,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:35,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 02:41:35,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:35,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 02:41:35,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 02:41:35,380 INFO L87 Difference]: Start difference. First operand 204 states and 238 transitions. Second operand has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 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) [2024-11-28 02:41:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:37,438 INFO L93 Difference]: Finished difference Result 235 states and 271 transitions. [2024-11-28 02:41:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 02:41:37,438 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 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) Word has length 65 [2024-11-28 02:41:37,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:37,440 INFO L225 Difference]: With dead ends: 235 [2024-11-28 02:41:37,440 INFO L226 Difference]: Without dead ends: 230 [2024-11-28 02:41:37,440 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 02:41:37,441 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 41 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:37,441 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1587 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 02:41:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-28 02:41:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 206. [2024-11-28 02:41:37,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 185 states have (on average 1.1675675675675676) internal successors, (216), 190 states have internal predecessors, (216), 9 states have call successors, (9), 6 states have call predecessors, (9), 11 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2024-11-28 02:41:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 240 transitions. [2024-11-28 02:41:37,472 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 240 transitions. Word has length 65 [2024-11-28 02:41:37,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:37,473 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 240 transitions. [2024-11-28 02:41:37,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 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) [2024-11-28 02:41:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 240 transitions. [2024-11-28 02:41:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-28 02:41:37,474 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:37,474 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:37,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 02:41:37,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:37,675 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:37,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:37,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1941144770, now seen corresponding path program 2 times [2024-11-28 02:41:37,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:37,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991607180] [2024-11-28 02:41:37,676 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:41:37,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:37,707 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:41:37,710 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:41:38,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:38,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991607180] [2024-11-28 02:41:38,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991607180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:38,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107155751] [2024-11-28 02:41:38,603 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:41:38,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:38,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:38,605 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:38,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 02:41:38,799 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:41:38,799 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:38,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-28 02:41:38,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:38,986 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 [2024-11-28 02:41:39,075 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 15 treesize of output 1 [2024-11-28 02:41:39,739 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-28 02:41:39,739 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 15 treesize of output 15 [2024-11-28 02:41:39,999 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 15 treesize of output 11 [2024-11-28 02:41:40,013 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 28 treesize of output 27 [2024-11-28 02:41:40,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 55 treesize of output 28 [2024-11-28 02:41:40,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2024-11-28 02:41:40,235 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 51 treesize of output 31 [2024-11-28 02:41:40,326 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 7 treesize of output 3 [2024-11-28 02:41:40,415 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 02:41:40,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2024-11-28 02:41:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:41:40,418 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:40,520 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 198 treesize of output 170 [2024-11-28 02:41:41,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107155751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:41,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:41:41,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 29 [2024-11-28 02:41:41,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849571578] [2024-11-28 02:41:41,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:41,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 02:41:41,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:41,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 02:41:41,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 02:41:41,140 INFO L87 Difference]: Start difference. First operand 206 states and 240 transitions. Second operand has 29 states, 29 states have (on average 3.0) internal successors, (87), 29 states have internal predecessors, (87), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 02:41:42,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:42,512 INFO L93 Difference]: Finished difference Result 261 states and 302 transitions. [2024-11-28 02:41:42,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 02:41:42,513 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0) internal successors, (87), 29 states have internal predecessors, (87), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2024-11-28 02:41:42,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:42,514 INFO L225 Difference]: With dead ends: 261 [2024-11-28 02:41:42,514 INFO L226 Difference]: Without dead ends: 256 [2024-11-28 02:41:42,515 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=226, Invalid=1844, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 02:41:42,515 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 189 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:42,516 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 911 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:41:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-28 02:41:42,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 216. [2024-11-28 02:41:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 195 states have (on average 1.1692307692307693) internal successors, (228), 199 states have internal predecessors, (228), 9 states have call successors, (9), 6 states have call predecessors, (9), 11 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2024-11-28 02:41:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 252 transitions. [2024-11-28 02:41:42,552 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 252 transitions. Word has length 66 [2024-11-28 02:41:42,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:42,552 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 252 transitions. [2024-11-28 02:41:42,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0) internal successors, (87), 29 states have internal predecessors, (87), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 02:41:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 252 transitions. [2024-11-28 02:41:42,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-28 02:41:42,554 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:42,554 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:42,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 02:41:42,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 02:41:42,758 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:42,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1244121388, now seen corresponding path program 1 times [2024-11-28 02:41:42,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:42,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626770013] [2024-11-28 02:41:42,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:42,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 02:41:42,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:42,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626770013] [2024-11-28 02:41:42,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626770013] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:42,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:42,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 02:41:42,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283762923] [2024-11-28 02:41:42,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:42,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:41:42,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:42,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:41:42,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:41:42,899 INFO L87 Difference]: Start difference. First operand 216 states and 252 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 02:41:43,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:43,041 INFO L93 Difference]: Finished difference Result 307 states and 363 transitions. [2024-11-28 02:41:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:41:43,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 67 [2024-11-28 02:41:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:43,046 INFO L225 Difference]: With dead ends: 307 [2024-11-28 02:41:43,046 INFO L226 Difference]: Without dead ends: 247 [2024-11-28 02:41:43,047 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:41:43,048 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 229 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 [2024-11-28 02:41:43,048 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 229 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:41:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-28 02:41:43,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2024-11-28 02:41:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 220 states have (on average 1.1681818181818182) internal successors, (257), 223 states have internal predecessors, (257), 9 states have call successors, (9), 6 states have call predecessors, (9), 13 states have return successors, (17), 13 states have call predecessors, (17), 9 states have call successors, (17) [2024-11-28 02:41:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 283 transitions. [2024-11-28 02:41:43,086 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 283 transitions. Word has length 67 [2024-11-28 02:41:43,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:43,087 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 283 transitions. [2024-11-28 02:41:43,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 02:41:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 283 transitions. [2024-11-28 02:41:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-28 02:41:43,088 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:43,088 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:43,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-28 02:41:43,088 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:43,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:43,089 INFO L85 PathProgramCache]: Analyzing trace with hash -477217942, now seen corresponding path program 9 times [2024-11-28 02:41:43,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:43,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124333268] [2024-11-28 02:41:43,089 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:41:43,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:43,117 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 02:41:43,117 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-28 02:41:43,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:43,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124333268] [2024-11-28 02:41:43,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124333268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:43,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560154460] [2024-11-28 02:41:43,911 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:41:43,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:43,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:43,913 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:43,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 02:41:44,087 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 02:41:44,087 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:44,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 02:41:44,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-28 02:41:44,627 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-28 02:41:45,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560154460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:45,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:45,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 19] total 45 [2024-11-28 02:41:45,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062760613] [2024-11-28 02:41:45,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:45,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 02:41:45,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:45,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 02:41:45,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1840, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 02:41:45,522 INFO L87 Difference]: Start difference. First operand 243 states and 283 transitions. Second operand has 45 states, 45 states have (on average 2.311111111111111) internal successors, (104), 42 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:41:48,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:48,240 INFO L93 Difference]: Finished difference Result 639 states and 767 transitions. [2024-11-28 02:41:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 02:41:48,241 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.311111111111111) internal successors, (104), 42 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2024-11-28 02:41:48,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:48,243 INFO L225 Difference]: With dead ends: 639 [2024-11-28 02:41:48,243 INFO L226 Difference]: Without dead ends: 429 [2024-11-28 02:41:48,245 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=402, Invalid=4020, Unknown=0, NotChecked=0, Total=4422 [2024-11-28 02:41:48,246 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 305 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:48,246 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 2078 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 02:41:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2024-11-28 02:41:48,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 283. [2024-11-28 02:41:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 258 states have (on average 1.1550387596899225) internal successors, (298), 261 states have internal predecessors, (298), 10 states have call successors, (10), 6 states have call predecessors, (10), 14 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-28 02:41:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 328 transitions. [2024-11-28 02:41:48,299 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 328 transitions. Word has length 67 [2024-11-28 02:41:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:48,299 INFO L471 AbstractCegarLoop]: Abstraction has 283 states and 328 transitions. [2024-11-28 02:41:48,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.311111111111111) internal successors, (104), 42 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:41:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 328 transitions. [2024-11-28 02:41:48,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-28 02:41:48,302 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:48,302 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:48,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 02:41:48,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:48,503 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:48,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:48,503 INFO L85 PathProgramCache]: Analyzing trace with hash 973572474, now seen corresponding path program 3 times [2024-11-28 02:41:48,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:48,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819929889] [2024-11-28 02:41:48,503 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:41:48,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:48,523 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:41:48,523 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:41:49,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:49,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819929889] [2024-11-28 02:41:49,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819929889] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:49,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798573429] [2024-11-28 02:41:49,299 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:41:49,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:49,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:49,302 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:49,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 02:41:49,492 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:41:49,492 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:49,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 02:41:49,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:41:50,661 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:41:51,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798573429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:51,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:51,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 53 [2024-11-28 02:41:51,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81315013] [2024-11-28 02:41:51,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:51,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-28 02:41:51,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:51,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-28 02:41:51,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2529, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 02:41:51,916 INFO L87 Difference]: Start difference. First operand 283 states and 328 transitions. Second operand has 53 states, 50 states have (on average 2.64) internal successors, (132), 50 states have internal predecessors, (132), 5 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 02:41:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:55,289 INFO L93 Difference]: Finished difference Result 859 states and 1051 transitions. [2024-11-28 02:41:55,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-28 02:41:55,290 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 2.64) internal successors, (132), 50 states have internal predecessors, (132), 5 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 68 [2024-11-28 02:41:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:55,292 INFO L225 Difference]: With dead ends: 859 [2024-11-28 02:41:55,292 INFO L226 Difference]: Without dead ends: 685 [2024-11-28 02:41:55,294 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=712, Invalid=6770, Unknown=0, NotChecked=0, Total=7482 [2024-11-28 02:41:55,295 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 326 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 1971 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:55,295 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 1971 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 02:41:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2024-11-28 02:41:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 372. [2024-11-28 02:41:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 336 states have (on average 1.1547619047619047) internal successors, (388), 344 states have internal predecessors, (388), 14 states have call successors, (14), 6 states have call predecessors, (14), 21 states have return successors, (46), 21 states have call predecessors, (46), 14 states have call successors, (46) [2024-11-28 02:41:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 448 transitions. [2024-11-28 02:41:55,380 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 448 transitions. Word has length 68 [2024-11-28 02:41:55,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:55,380 INFO L471 AbstractCegarLoop]: Abstraction has 372 states and 448 transitions. [2024-11-28 02:41:55,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 2.64) internal successors, (132), 50 states have internal predecessors, (132), 5 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 02:41:55,380 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 448 transitions. [2024-11-28 02:41:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-28 02:41:55,382 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:55,382 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:55,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 02:41:55,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:55,582 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:55,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:55,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1035612088, now seen corresponding path program 4 times [2024-11-28 02:41:55,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:55,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570165018] [2024-11-28 02:41:55,583 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:41:55,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:55,606 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:41:55,606 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:41:56,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:56,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570165018] [2024-11-28 02:41:56,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570165018] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:56,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300207865] [2024-11-28 02:41:56,027 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:41:56,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:56,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:56,030 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:56,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 02:41:56,238 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:41:56,238 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:56,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:41:56,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 02:41:56,507 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 02:41:57,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300207865] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:57,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:57,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2024-11-28 02:41:57,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362327995] [2024-11-28 02:41:57,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:57,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:41:57,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:57,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:41:57,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:41:57,097 INFO L87 Difference]: Start difference. First operand 372 states and 448 transitions. Second operand has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 states have internal predecessors, (86), 3 states have call successors, (4), 1 states have call predecessors, (4), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:41:57,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:57,749 INFO L93 Difference]: Finished difference Result 493 states and 587 transitions. [2024-11-28 02:41:57,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 02:41:57,750 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 states have internal predecessors, (86), 3 states have call successors, (4), 1 states have call predecessors, (4), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2024-11-28 02:41:57,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:57,752 INFO L225 Difference]: With dead ends: 493 [2024-11-28 02:41:57,752 INFO L226 Difference]: Without dead ends: 369 [2024-11-28 02:41:57,753 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 02:41:57,753 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 99 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:57,753 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 558 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:41:57,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2024-11-28 02:41:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 337. [2024-11-28 02:41:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 307 states have (on average 1.1530944625407167) internal successors, (354), 310 states have internal predecessors, (354), 12 states have call successors, (12), 7 states have call predecessors, (12), 17 states have return successors, (33), 19 states have call predecessors, (33), 12 states have call successors, (33) [2024-11-28 02:41:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 399 transitions. [2024-11-28 02:41:57,798 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 399 transitions. Word has length 68 [2024-11-28 02:41:57,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:57,799 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 399 transitions. [2024-11-28 02:41:57,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 states have internal predecessors, (86), 3 states have call successors, (4), 1 states have call predecessors, (4), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:41:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 399 transitions. [2024-11-28 02:41:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-28 02:41:57,800 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:57,800 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:57,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 02:41:58,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:58,004 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:58,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:58,005 INFO L85 PathProgramCache]: Analyzing trace with hash -942018906, now seen corresponding path program 10 times [2024-11-28 02:41:58,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:58,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860099491] [2024-11-28 02:41:58,005 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:41:58,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:58,037 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:41:58,037 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 02:42:00,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:00,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860099491] [2024-11-28 02:42:00,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860099491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:00,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676618159] [2024-11-28 02:42:00,427 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:42:00,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:00,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:00,430 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:00,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2719814d-54a6-407b-a317-da086aa5c07b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 02:42:00,641 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:42:00,641 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:00,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-28 02:42:00,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:00,672 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 [2024-11-28 02:42:00,748 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 [2024-11-28 02:42:00,758 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 [2024-11-28 02:42:00,863 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-28 02:42:00,864 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 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-28 02:42:00,979 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 27 treesize of output 15 [2024-11-28 02:42:01,010 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 23 treesize of output 22 [2024-11-28 02:42:01,191 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2024-11-28 02:42:01,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2024-11-28 02:42:01,393 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-28 02:42:01,393 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 49 [2024-11-28 02:42:01,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2024-11-28 02:42:01,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:42:01,668 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2024-11-28 02:42:01,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2024-11-28 02:42:01,871 INFO L349 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2024-11-28 02:42:01,871 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 141 treesize of output 69 [2024-11-28 02:42:01,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:42:01,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:42:01,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 62 [2024-11-28 02:42:02,988 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 183 treesize of output 135 [2024-11-28 02:42:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:42:03,860 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:04,331 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 264 treesize of output 196 [2024-11-28 02:42:04,334 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 200 treesize of output 132 [2024-11-28 02:43:10,816 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:43:10,817 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:43:10,820 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:43:10,960 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:43:10,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 154961 treesize of output 135722 [2024-11-28 02:43:11,526 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:43:11,528 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:43:11,536 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:43:17,694 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 02:43:17,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 61710 treesize of output 60942 [2024-11-28 02:43:17,917 INFO L349 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2024-11-28 02:43:17,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 11510 treesize of output 11262 [2024-11-28 02:43:27,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:43:27,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 265 treesize of output 1454