./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-14.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_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/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_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-14.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/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_6f746b57-676f-431a-ac55-cffbbccde333/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 0d45567a05c43a020d83c4148b7193297efc53c68aa1babb30080e6503f970de --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:19:52,712 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:19:52,829 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 20:19:52,836 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:19:52,836 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:19:52,874 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:19:52,876 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:19:52,876 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:19:52,877 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:19:52,877 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:19:52,879 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:19:52,879 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:19:52,879 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:19:52,880 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:19:52,880 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:19:52,881 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:19:52,881 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:19:52,882 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:19:52,882 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:19:52,882 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:19:52,882 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:19:52,882 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:19:52,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:19:52,883 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:19:52,883 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:19:52,883 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:19:52,883 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:19:52,883 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:19:52,884 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:19:52,884 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:19:52,884 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:19:52,884 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:19:52,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:19:52,885 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:19:52,886 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:19:52,886 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:19:52,886 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:19:52,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:19:52,886 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:19:52,886 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:19:52,887 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:19:52,887 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:19:52,887 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:19:52,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:19:52,887 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:19:52,887 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:19:52,887 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:19:52,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:19:52,888 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_6f746b57-676f-431a-ac55-cffbbccde333/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 -> 0d45567a05c43a020d83c4148b7193297efc53c68aa1babb30080e6503f970de [2024-11-27 20:19:53,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:19:53,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:19:53,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:19:53,257 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:19:53,257 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:19:53,259 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-14.i [2024-11-27 20:19:56,510 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/data/b67a8556b/b0ab97acfa714cd6964086df36f1ae57/FLAGe8c861684 [2024-11-27 20:19:56,785 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:19:56,786 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-14.i [2024-11-27 20:19:56,793 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/data/b67a8556b/b0ab97acfa714cd6964086df36f1ae57/FLAGe8c861684 [2024-11-27 20:19:56,813 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/data/b67a8556b/b0ab97acfa714cd6964086df36f1ae57 [2024-11-27 20:19:56,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:19:56,818 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:19:56,820 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:19:56,820 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:19:56,825 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:19:56,826 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:19:56" (1/1) ... [2024-11-27 20:19:56,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b5c4e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:56, skipping insertion in model container [2024-11-27 20:19:56,827 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:19:56" (1/1) ... [2024-11-27 20:19:56,847 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:19:57,062 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_6f746b57-676f-431a-ac55-cffbbccde333/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-14.i[915,928] [2024-11-27 20:19:57,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:19:57,159 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:19:57,175 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_6f746b57-676f-431a-ac55-cffbbccde333/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-14.i[915,928] [2024-11-27 20:19:57,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:19:57,236 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:19:57,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57 WrapperNode [2024-11-27 20:19:57,238 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:19:57,239 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:19:57,240 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:19:57,240 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:19:57,250 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57" (1/1) ... [2024-11-27 20:19:57,261 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57" (1/1) ... [2024-11-27 20:19:57,296 INFO L138 Inliner]: procedures = 26, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 115 [2024-11-27 20:19:57,299 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:19:57,300 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:19:57,300 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:19:57,300 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:19:57,315 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57" (1/1) ... [2024-11-27 20:19:57,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57" (1/1) ... [2024-11-27 20:19:57,321 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57" (1/1) ... [2024-11-27 20:19:57,352 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-27 20:19:57,353 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57" (1/1) ... [2024-11-27 20:19:57,353 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57" (1/1) ... [2024-11-27 20:19:57,358 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57" (1/1) ... [2024-11-27 20:19:57,359 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57" (1/1) ... [2024-11-27 20:19:57,362 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57" (1/1) ... [2024-11-27 20:19:57,368 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57" (1/1) ... [2024-11-27 20:19:57,369 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57" (1/1) ... [2024-11-27 20:19:57,374 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:19:57,375 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:19:57,375 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:19:57,376 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:19:57,380 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57" (1/1) ... [2024-11-27 20:19:57,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:19:57,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:57,429 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:19:57,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:19:57,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:19:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-27 20:19:57,466 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-27 20:19:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:19:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:19:57,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:19:57,562 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:19:57,564 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:19:57,891 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-27 20:19:57,891 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:19:57,903 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:19:57,903 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-27 20:19:57,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:19:57 BoogieIcfgContainer [2024-11-27 20:19:57,904 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:19:57,907 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:19:57,907 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:19:57,913 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:19:57,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:19:56" (1/3) ... [2024-11-27 20:19:57,914 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c3f682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:19:57, skipping insertion in model container [2024-11-27 20:19:57,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:19:57" (2/3) ... [2024-11-27 20:19:57,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c3f682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:19:57, skipping insertion in model container [2024-11-27 20:19:57,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:19:57" (3/3) ... [2024-11-27 20:19:57,917 INFO L128 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-while_file-14.i [2024-11-27 20:19:57,937 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:19:57,939 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hardness_loopvsstraightlinecode_25-while_file-14.i that has 2 procedures, 51 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-27 20:19:58,015 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:19:58,037 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;@26bb065d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:19:58,037 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 20:19:58,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 32 states have (on average 1.3125) internal successors, (42), 33 states have internal predecessors, (42), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-27 20:19:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-27 20:19:58,059 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:58,060 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:58,060 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:58,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:58,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1173987694, now seen corresponding path program 1 times [2024-11-27 20:19:58,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:19:58,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109397511] [2024-11-27 20:19:58,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:58,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:19:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-11-27 20:19:58,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:19:58,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109397511] [2024-11-27 20:19:58,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109397511] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:19:58,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364236827] [2024-11-27 20:19:58,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:58,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:58,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:58,531 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:58,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:19:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:58,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-27 20:19:58,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-11-27 20:19:58,869 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:19:58,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364236827] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:19:58,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:19:58,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-27 20:19:58,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392795503] [2024-11-27 20:19:58,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:58,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 20:19:58,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:19:58,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 20:19:58,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:19:58,908 INFO L87 Difference]: Start difference. First operand has 51 states, 32 states have (on average 1.3125) internal successors, (42), 33 states have internal predecessors, (42), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-27 20:19:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:58,950 INFO L93 Difference]: Finished difference Result 95 states and 158 transitions. [2024-11-27 20:19:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 20:19:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 104 [2024-11-27 20:19:58,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:58,963 INFO L225 Difference]: With dead ends: 95 [2024-11-27 20:19:58,964 INFO L226 Difference]: Without dead ends: 47 [2024-11-27 20:19:58,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:19:58,975 INFO L435 NwaCegarLoop]: 67 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, 67 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:58,976 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:19:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-27 20:19:59,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-27 20:19:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-27 20:19:59,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2024-11-27 20:19:59,024 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 67 transitions. Word has length 104 [2024-11-27 20:19:59,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:59,024 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 67 transitions. [2024-11-27 20:19:59,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-27 20:19:59,025 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 67 transitions. [2024-11-27 20:19:59,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-27 20:19:59,030 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:59,030 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:59,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:19:59,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-27 20:19:59,231 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:59,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash -807059822, now seen corresponding path program 1 times [2024-11-27 20:19:59,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:19:59,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913016218] [2024-11-27 20:19:59,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:59,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:19:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-27 20:20:00,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:20:00,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913016218] [2024-11-27 20:20:00,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913016218] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:00,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:20:00,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:20:00,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265366111] [2024-11-27 20:20:00,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:00,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:20:00,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:20:00,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:20:00,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:20:00,081 INFO L87 Difference]: Start difference. First operand 47 states and 67 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-27 20:20:00,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:00,307 INFO L93 Difference]: Finished difference Result 146 states and 208 transitions. [2024-11-27 20:20:00,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:20:00,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 104 [2024-11-27 20:20:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:00,311 INFO L225 Difference]: With dead ends: 146 [2024-11-27 20:20:00,311 INFO L226 Difference]: Without dead ends: 102 [2024-11-27 20:20:00,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:20:00,316 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 63 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:00,317 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 180 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:20:00,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-27 20:20:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2024-11-27 20:20:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 32 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-27 20:20:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 128 transitions. [2024-11-27 20:20:00,363 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 128 transitions. Word has length 104 [2024-11-27 20:20:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:00,364 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 128 transitions. [2024-11-27 20:20:00,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-27 20:20:00,365 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 128 transitions. [2024-11-27 20:20:00,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-27 20:20:00,366 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:00,366 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:00,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:20:00,367 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:00,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:00,367 INFO L85 PathProgramCache]: Analyzing trace with hash -105995244, now seen corresponding path program 1 times [2024-11-27 20:20:00,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:20:00,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484677900] [2024-11-27 20:20:00,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:00,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:20:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-27 20:20:06,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:20:06,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484677900] [2024-11-27 20:20:06,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484677900] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:06,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:20:06,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 20:20:06,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600863580] [2024-11-27 20:20:06,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:06,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:20:06,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:20:06,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:20:06,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:20:06,446 INFO L87 Difference]: Start difference. First operand 89 states and 128 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-27 20:20:07,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:07,821 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2024-11-27 20:20:07,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:20:07,821 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 104 [2024-11-27 20:20:07,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:07,824 INFO L225 Difference]: With dead ends: 99 [2024-11-27 20:20:07,824 INFO L226 Difference]: Without dead ends: 97 [2024-11-27 20:20:07,828 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:20:07,829 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 49 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:07,830 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 276 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 20:20:07,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-27 20:20:07,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2024-11-27 20:20:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 57 states have internal predecessors, (67), 32 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-27 20:20:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 131 transitions. [2024-11-27 20:20:07,855 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 131 transitions. Word has length 104 [2024-11-27 20:20:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:07,857 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 131 transitions. [2024-11-27 20:20:07,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-27 20:20:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 131 transitions. [2024-11-27 20:20:07,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-27 20:20:07,861 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:07,861 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:07,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 20:20:07,862 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:07,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash -104148202, now seen corresponding path program 1 times [2024-11-27 20:20:07,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:20:07,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438916244] [2024-11-27 20:20:07,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:07,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:20:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-27 20:20:08,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:20:08,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438916244] [2024-11-27 20:20:08,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438916244] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:08,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:20:08,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:20:08,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835105216] [2024-11-27 20:20:08,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:08,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:20:08,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:20:08,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:20:08,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:20:08,045 INFO L87 Difference]: Start difference. First operand 92 states and 131 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-27 20:20:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:08,263 INFO L93 Difference]: Finished difference Result 222 states and 319 transitions. [2024-11-27 20:20:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:20:08,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 104 [2024-11-27 20:20:08,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:08,266 INFO L225 Difference]: With dead ends: 222 [2024-11-27 20:20:08,266 INFO L226 Difference]: Without dead ends: 133 [2024-11-27 20:20:08,267 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:20:08,270 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 47 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:08,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 211 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:20:08,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-27 20:20:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2024-11-27 20:20:08,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 79 states have internal predecessors, (92), 48 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-27 20:20:08,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 188 transitions. [2024-11-27 20:20:08,314 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 188 transitions. Word has length 104 [2024-11-27 20:20:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:08,318 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 188 transitions. [2024-11-27 20:20:08,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-27 20:20:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 188 transitions. [2024-11-27 20:20:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-27 20:20:08,320 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:08,321 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:08,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 20:20:08,321 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:08,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:08,321 INFO L85 PathProgramCache]: Analyzing trace with hash 359733697, now seen corresponding path program 1 times [2024-11-27 20:20:08,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:20:08,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68364607] [2024-11-27 20:20:08,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:08,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:20:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-27 20:20:13,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:20:13,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68364607] [2024-11-27 20:20:13,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68364607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:13,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:20:13,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-27 20:20:13,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572099925] [2024-11-27 20:20:13,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:13,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 20:20:13,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:20:13,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 20:20:13,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:20:13,736 INFO L87 Difference]: Start difference. First operand 131 states and 188 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-27 20:20:15,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:15,170 INFO L93 Difference]: Finished difference Result 165 states and 223 transitions. [2024-11-27 20:20:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:20:15,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 105 [2024-11-27 20:20:15,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:15,172 INFO L225 Difference]: With dead ends: 165 [2024-11-27 20:20:15,175 INFO L226 Difference]: Without dead ends: 163 [2024-11-27 20:20:15,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:20:15,177 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 57 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:15,177 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 354 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 20:20:15,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-27 20:20:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 138. [2024-11-27 20:20:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 86 states have internal predecessors, (100), 48 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-27 20:20:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 196 transitions. [2024-11-27 20:20:15,202 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 196 transitions. Word has length 105 [2024-11-27 20:20:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:15,203 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 196 transitions. [2024-11-27 20:20:15,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-27 20:20:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 196 transitions. [2024-11-27 20:20:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-27 20:20:15,205 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:15,205 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:15,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 20:20:15,205 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:15,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1415273665, now seen corresponding path program 1 times [2024-11-27 20:20:15,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:20:15,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345187946] [2024-11-27 20:20:15,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:15,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:20:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-27 20:20:22,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:20:22,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345187946] [2024-11-27 20:20:22,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345187946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:22,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:20:22,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-27 20:20:22,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664829371] [2024-11-27 20:20:22,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:22,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:20:22,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:20:22,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:20:22,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:20:22,263 INFO L87 Difference]: Start difference. First operand 138 states and 196 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-27 20:20:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:24,532 INFO L93 Difference]: Finished difference Result 177 states and 240 transitions. [2024-11-27 20:20:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 20:20:24,533 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 105 [2024-11-27 20:20:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:24,535 INFO L225 Difference]: With dead ends: 177 [2024-11-27 20:20:24,535 INFO L226 Difference]: Without dead ends: 175 [2024-11-27 20:20:24,536 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2024-11-27 20:20:24,537 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 103 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:24,537 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 249 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 20:20:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-27 20:20:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 147. [2024-11-27 20:20:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 95 states have internal predecessors, (112), 48 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-27 20:20:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 208 transitions. [2024-11-27 20:20:24,567 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 208 transitions. Word has length 105 [2024-11-27 20:20:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:24,568 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 208 transitions. [2024-11-27 20:20:24,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-27 20:20:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 208 transitions. [2024-11-27 20:20:24,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-11-27 20:20:24,571 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:24,571 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 32, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:24,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 20:20:24,572 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:24,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:24,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1660332687, now seen corresponding path program 1 times [2024-11-27 20:20:24,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:20:24,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585067387] [2024-11-27 20:20:24,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:24,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:20:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2024-11-27 20:20:25,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:20:25,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585067387] [2024-11-27 20:20:25,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585067387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:25,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:20:25,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:20:25,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142403219] [2024-11-27 20:20:25,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:25,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:20:25,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:20:25,057 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:20:25,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:20:25,059 INFO L87 Difference]: Start difference. First operand 147 states and 208 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2024-11-27 20:20:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:25,257 INFO L93 Difference]: Finished difference Result 325 states and 458 transitions. [2024-11-27 20:20:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:20:25,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 206 [2024-11-27 20:20:25,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:25,261 INFO L225 Difference]: With dead ends: 325 [2024-11-27 20:20:25,263 INFO L226 Difference]: Without dead ends: 223 [2024-11-27 20:20:25,264 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:20:25,265 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 65 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:25,268 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 213 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:20:25,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-27 20:20:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 187. [2024-11-27 20:20:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 118 states have (on average 1.152542372881356) internal successors, (136), 118 states have internal predecessors, (136), 64 states have call successors, (64), 4 states have call predecessors, (64), 4 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2024-11-27 20:20:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 264 transitions. [2024-11-27 20:20:25,321 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 264 transitions. Word has length 206 [2024-11-27 20:20:25,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:25,322 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 264 transitions. [2024-11-27 20:20:25,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2024-11-27 20:20:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 264 transitions. [2024-11-27 20:20:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-11-27 20:20:25,327 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:25,327 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 32, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:25,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 20:20:25,330 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:25,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:25,330 INFO L85 PathProgramCache]: Analyzing trace with hash -959268109, now seen corresponding path program 1 times [2024-11-27 20:20:25,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:20:25,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336282024] [2024-11-27 20:20:25,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:25,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:20:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2024-11-27 20:20:28,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:20:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336282024] [2024-11-27 20:20:28,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336282024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:20:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032345986] [2024-11-27 20:20:28,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:28,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:28,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:28,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:28,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f746b57-676f-431a-ac55-cffbbccde333/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:20:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:28,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-27 20:20:28,841 INFO L279 TraceCheckSpWp]: Computing forward predicates...