./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd --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 ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 16:17:19,688 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 16:17:19,753 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 16:17:19,766 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 16:17:19,767 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 16:17:19,808 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 16:17:19,810 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 16:17:19,810 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 16:17:19,810 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 16:17:19,810 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 16:17:19,811 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 16:17:19,811 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 16:17:19,811 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 16:17:19,812 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 16:17:19,812 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 16:17:19,814 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 16:17:19,814 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 16:17:19,814 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 16:17:19,814 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 16:17:19,814 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 16:17:19,814 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 16:17:19,814 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 16:17:19,815 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 16:17:19,815 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 16:17:19,815 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 16:17:19,815 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 16:17:19,815 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 16:17:19,815 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 16:17:19,816 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 16:17:19,816 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 16:17:19,816 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 16:17:19,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 16:17:19,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:17:19,816 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 16:17:19,816 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 16:17:19,816 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 16:17:19,816 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 16:17:19,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 16:17:19,816 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 16:17:19,817 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 16:17:19,817 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 16:17:19,817 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 16:17:19,817 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_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd 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 -> ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e [2024-11-13 16:17:20,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 16:17:20,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 16:17:20,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 16:17:20,158 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 16:17:20,158 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 16:17:20,160 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c Unable to find full path for "g++" [2024-11-13 16:17:22,086 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 16:17:22,427 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 16:17:22,427 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2024-11-13 16:17:22,447 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/data/22f3a2fb7/df3e5a8b155c4f11a57cc6ef2fcb9d29/FLAGf958d6712 [2024-11-13 16:17:22,469 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/data/22f3a2fb7/df3e5a8b155c4f11a57cc6ef2fcb9d29 [2024-11-13 16:17:22,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 16:17:22,473 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 16:17:22,475 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 16:17:22,475 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 16:17:22,479 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 16:17:22,480 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:17:22" (1/1) ... [2024-11-13 16:17:22,481 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62185ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22, skipping insertion in model container [2024-11-13 16:17:22,481 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:17:22" (1/1) ... [2024-11-13 16:17:22,495 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 16:17:22,656 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_809df564-7208-4e7b-aec2-8621b538392a/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2024-11-13 16:17:22,698 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:17:22,708 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 16:17:22,718 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_809df564-7208-4e7b-aec2-8621b538392a/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2024-11-13 16:17:22,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:17:22,762 INFO L204 MainTranslator]: Completed translation [2024-11-13 16:17:22,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22 WrapperNode [2024-11-13 16:17:22,763 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 16:17:22,766 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 16:17:22,767 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 16:17:22,767 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 16:17:22,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22" (1/1) ... [2024-11-13 16:17:22,784 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22" (1/1) ... [2024-11-13 16:17:22,817 INFO L138 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 110 [2024-11-13 16:17:22,818 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 16:17:22,819 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 16:17:22,819 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 16:17:22,819 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 16:17:22,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22" (1/1) ... [2024-11-13 16:17:22,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22" (1/1) ... [2024-11-13 16:17:22,834 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22" (1/1) ... [2024-11-13 16:17:22,852 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 3, 3, 2]. 30 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-11-13 16:17:22,852 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22" (1/1) ... [2024-11-13 16:17:22,852 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22" (1/1) ... [2024-11-13 16:17:22,861 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22" (1/1) ... [2024-11-13 16:17:22,865 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22" (1/1) ... [2024-11-13 16:17:22,867 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22" (1/1) ... [2024-11-13 16:17:22,868 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22" (1/1) ... [2024-11-13 16:17:22,873 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 16:17:22,874 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 16:17:22,874 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 16:17:22,874 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 16:17:22,875 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22" (1/1) ... [2024-11-13 16:17:22,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:17:22,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:17:22,907 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 16:17:22,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 16:17:22,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 16:17:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 16:17:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 16:17:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-13 16:17:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-13 16:17:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 16:17:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 16:17:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 16:17:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-13 16:17:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-13 16:17:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 16:17:22,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 16:17:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 16:17:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 16:17:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-13 16:17:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-13 16:17:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 16:17:23,045 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 16:17:23,047 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 16:17:23,296 INFO L? ?]: Removed 27 outVars from TransFormulas that were not future-live. [2024-11-13 16:17:23,297 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 16:17:23,307 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 16:17:23,309 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-13 16:17:23,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:17:23 BoogieIcfgContainer [2024-11-13 16:17:23,310 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 16:17:23,313 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 16:17:23,315 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 16:17:23,321 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 16:17:23,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 04:17:22" (1/3) ... [2024-11-13 16:17:23,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb3506f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:17:23, skipping insertion in model container [2024-11-13 16:17:23,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:17:22" (2/3) ... [2024-11-13 16:17:23,324 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb3506f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:17:23, skipping insertion in model container [2024-11-13 16:17:23,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:17:23" (3/3) ... [2024-11-13 16:17:23,325 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2024-11-13 16:17:23,343 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 16:17:23,344 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG diff-3-n-u.c that has 1 procedures, 27 locations, 1 initial locations, 9 loop locations, and 1 error locations. [2024-11-13 16:17:23,411 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:17:23,428 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;@13632728, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:17:23,428 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 16:17:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:23,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 16:17:23,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:17:23,440 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:17:23,440 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:17:23,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:17:23,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1727659435, now seen corresponding path program 1 times [2024-11-13 16:17:23,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:17:23,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564552350] [2024-11-13 16:17:23,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:17:23,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:17:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:17:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:17:23,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:17:23,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564552350] [2024-11-13 16:17:23,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564552350] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:17:23,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:17:23,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 16:17:23,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890215840] [2024-11-13 16:17:23,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:17:23,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 16:17:23,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:17:23,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 16:17:23,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 16:17:23,687 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:17:23,698 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2024-11-13 16:17:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 16:17:23,700 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-13 16:17:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:17:23,707 INFO L225 Difference]: With dead ends: 52 [2024-11-13 16:17:23,707 INFO L226 Difference]: Without dead ends: 23 [2024-11-13 16:17:23,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 16:17:23,713 INFO L432 NwaCegarLoop]: 35 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, 35 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 [2024-11-13 16:17:23,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:17:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-13 16:17:23,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-13 16:17:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:23,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2024-11-13 16:17:23,748 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2024-11-13 16:17:23,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:17:23,749 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2024-11-13 16:17:23,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2024-11-13 16:17:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 16:17:23,751 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:17:23,751 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:17:23,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 16:17:23,752 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:17:23,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:17:23,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1738841315, now seen corresponding path program 1 times [2024-11-13 16:17:23,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:17:23,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679409198] [2024-11-13 16:17:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:17:23,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:17:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:17:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:17:23,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:17:23,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679409198] [2024-11-13 16:17:23,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679409198] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:17:23,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:17:23,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 16:17:23,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255695359] [2024-11-13 16:17:23,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:17:23,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:17:23,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:17:23,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:17:23,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:17:23,983 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:17:24,060 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2024-11-13 16:17:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:17:24,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-13 16:17:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:17:24,063 INFO L225 Difference]: With dead ends: 44 [2024-11-13 16:17:24,063 INFO L226 Difference]: Without dead ends: 28 [2024-11-13 16:17:24,063 INFO L431 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 [2024-11-13 16:17:24,066 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:17:24,066 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:17:24,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-13 16:17:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2024-11-13 16:17:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2024-11-13 16:17:24,075 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2024-11-13 16:17:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:17:24,075 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2024-11-13 16:17:24,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2024-11-13 16:17:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-13 16:17:24,076 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:17:24,076 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:17:24,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 16:17:24,079 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:17:24,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:17:24,079 INFO L85 PathProgramCache]: Analyzing trace with hash -336266585, now seen corresponding path program 1 times [2024-11-13 16:17:24,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:17:24,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773045854] [2024-11-13 16:17:24,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:17:24,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:17:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:17:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:17:24,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:17:24,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773045854] [2024-11-13 16:17:24,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773045854] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:17:24,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:17:24,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:17:24,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683620871] [2024-11-13 16:17:24,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:17:24,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:17:24,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:17:24,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:17:24,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:17:24,285 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:24,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:17:24,382 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2024-11-13 16:17:24,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:17:24,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-13 16:17:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:17:24,384 INFO L225 Difference]: With dead ends: 58 [2024-11-13 16:17:24,384 INFO L226 Difference]: Without dead ends: 37 [2024-11-13 16:17:24,384 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:17:24,385 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:17:24,385 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 35 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:17:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-13 16:17:24,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2024-11-13 16:17:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2024-11-13 16:17:24,392 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2024-11-13 16:17:24,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:17:24,392 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2024-11-13 16:17:24,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:24,392 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2024-11-13 16:17:24,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-13 16:17:24,393 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:17:24,393 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:17:24,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 16:17:24,393 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:17:24,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:17:24,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1759708035, now seen corresponding path program 1 times [2024-11-13 16:17:24,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:17:24,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030618860] [2024-11-13 16:17:24,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:17:24,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:17:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:17:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:17:24,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:17:24,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030618860] [2024-11-13 16:17:24,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030618860] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:17:24,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:17:24,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:17:24,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204872003] [2024-11-13 16:17:24,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:17:24,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:17:24,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:17:24,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:17:24,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:17:24,532 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:24,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:17:24,598 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2024-11-13 16:17:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:17:24,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-13 16:17:24,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:17:24,602 INFO L225 Difference]: With dead ends: 58 [2024-11-13 16:17:24,602 INFO L226 Difference]: Without dead ends: 34 [2024-11-13 16:17:24,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:17:24,603 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:17:24,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:17:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-13 16:17:24,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-11-13 16:17:24,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:24,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2024-11-13 16:17:24,615 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2024-11-13 16:17:24,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:17:24,615 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2024-11-13 16:17:24,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:24,616 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2024-11-13 16:17:24,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-13 16:17:24,618 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:17:24,618 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:17:24,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 16:17:24,618 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:17:24,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:17:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash 736216601, now seen corresponding path program 1 times [2024-11-13 16:17:24,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:17:24,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713363491] [2024-11-13 16:17:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:17:24,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:17:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:17:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 16:17:24,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:17:24,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713363491] [2024-11-13 16:17:24,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713363491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:17:24,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:17:24,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:17:24,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943725024] [2024-11-13 16:17:24,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:17:24,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:17:24,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:17:24,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:17:24,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:17:24,776 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:17:24,860 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2024-11-13 16:17:24,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:17:24,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-13 16:17:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:17:24,863 INFO L225 Difference]: With dead ends: 66 [2024-11-13 16:17:24,863 INFO L226 Difference]: Without dead ends: 54 [2024-11-13 16:17:24,863 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:17:24,864 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:17:24,864 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 38 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:17:24,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-13 16:17:24,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2024-11-13 16:17:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2024-11-13 16:17:24,873 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2024-11-13 16:17:24,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:17:24,873 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2024-11-13 16:17:24,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:24,873 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2024-11-13 16:17:24,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-13 16:17:24,874 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:17:24,874 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:17:24,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 16:17:24,874 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:17:24,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:17:24,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1816486539, now seen corresponding path program 1 times [2024-11-13 16:17:24,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:17:24,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440487520] [2024-11-13 16:17:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:17:24,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:17:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:17:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 16:17:24,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:17:24,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440487520] [2024-11-13 16:17:24,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440487520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:17:24,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250075058] [2024-11-13 16:17:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:17:24,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:17:24,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:17:24,992 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:17:24,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 16:17:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:17:25,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 16:17:25,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:17:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 16:17:25,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:17:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 16:17:25,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250075058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:17:25,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:17:25,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-13 16:17:25,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738890219] [2024-11-13 16:17:25,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:17:25,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 16:17:25,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:17:25,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 16:17:25,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-13 16:17:25,258 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:25,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:17:25,404 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2024-11-13 16:17:25,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:17:25,404 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-13 16:17:25,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:17:25,405 INFO L225 Difference]: With dead ends: 80 [2024-11-13 16:17:25,406 INFO L226 Difference]: Without dead ends: 52 [2024-11-13 16:17:25,407 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2024-11-13 16:17:25,407 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:17:25,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 75 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:17:25,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-13 16:17:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2024-11-13 16:17:25,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2024-11-13 16:17:25,431 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 25 [2024-11-13 16:17:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:17:25,432 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2024-11-13 16:17:25,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:25,432 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2024-11-13 16:17:25,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 16:17:25,432 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:17:25,432 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:17:25,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 16:17:25,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 16:17:25,633 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:17:25,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:17:25,634 INFO L85 PathProgramCache]: Analyzing trace with hash 679717597, now seen corresponding path program 2 times [2024-11-13 16:17:25,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:17:25,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652692718] [2024-11-13 16:17:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:17:25,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:17:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:17:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:17:25,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:17:25,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652692718] [2024-11-13 16:17:25,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652692718] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:17:25,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440853058] [2024-11-13 16:17:25,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:17:25,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:17:25,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:17:25,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:17:25,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 16:17:25,980 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:17:25,980 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:17:25,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 16:17:25,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:17:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:17:26,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:17:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:17:26,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440853058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:17:26,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:17:26,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-13 16:17:26,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876150415] [2024-11-13 16:17:26,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:17:26,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 16:17:26,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:17:26,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 16:17:26,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2024-11-13 16:17:26,215 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:26,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:17:26,554 INFO L93 Difference]: Finished difference Result 137 states and 174 transitions. [2024-11-13 16:17:26,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 16:17:26,555 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-13 16:17:26,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:17:26,556 INFO L225 Difference]: With dead ends: 137 [2024-11-13 16:17:26,556 INFO L226 Difference]: Without dead ends: 94 [2024-11-13 16:17:26,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2024-11-13 16:17:26,557 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 137 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:17:26,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 199 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:17:26,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-13 16:17:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2024-11-13 16:17:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.24) internal successors, (93), 75 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2024-11-13 16:17:26,591 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 31 [2024-11-13 16:17:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:17:26,591 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2024-11-13 16:17:26,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2024-11-13 16:17:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 16:17:26,592 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:17:26,592 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:17:26,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 16:17:26,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:17:26,793 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:17:26,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:17:26,793 INFO L85 PathProgramCache]: Analyzing trace with hash -42243875, now seen corresponding path program 3 times [2024-11-13 16:17:26,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:17:26,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912510202] [2024-11-13 16:17:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:17:26,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:17:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:17:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-13 16:17:27,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:17:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912510202] [2024-11-13 16:17:27,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912510202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:17:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518609388] [2024-11-13 16:17:27,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:17:27,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:17:27,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:17:27,433 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:17:27,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 16:17:27,586 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 16:17:27,587 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:17:27,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 16:17:27,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:17:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-13 16:17:27,743 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:17:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-13 16:17:27,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518609388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:17:27,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:17:27,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 4, 4] total 18 [2024-11-13 16:17:27,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690867182] [2024-11-13 16:17:27,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:17:27,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 16:17:27,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:17:27,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 16:17:27,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2024-11-13 16:17:27,831 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:17:29,401 INFO L93 Difference]: Finished difference Result 229 states and 269 transitions. [2024-11-13 16:17:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-13 16:17:29,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-13 16:17:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:17:29,403 INFO L225 Difference]: With dead ends: 229 [2024-11-13 16:17:29,403 INFO L226 Difference]: Without dead ends: 156 [2024-11-13 16:17:29,406 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1355, Invalid=2935, Unknown=0, NotChecked=0, Total=4290 [2024-11-13 16:17:29,407 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 362 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:17:29,407 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 113 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:17:29,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-13 16:17:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 132. [2024-11-13 16:17:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1908396946564885) internal successors, (156), 131 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2024-11-13 16:17:29,463 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 43 [2024-11-13 16:17:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:17:29,463 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2024-11-13 16:17:29,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:17:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2024-11-13 16:17:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-13 16:17:29,465 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:17:29,465 INFO L215 NwaCegarLoop]: trace histogram [44, 11, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:17:29,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 16:17:29,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:17:29,677 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:17:29,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:17:29,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1942342769, now seen corresponding path program 4 times [2024-11-13 16:17:29,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:17:29,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480633184] [2024-11-13 16:17:29,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:17:29,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:17:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:17:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 443 proven. 66 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2024-11-13 16:17:30,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:17:30,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480633184] [2024-11-13 16:17:30,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480633184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:17:30,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721108336] [2024-11-13 16:17:30,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:17:30,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:17:30,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:17:30,666 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:17:30,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809df564-7208-4e7b-aec2-8621b538392a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process