./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pnr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU --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 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:17:56,315 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:17:56,406 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:17:56,414 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:17:56,416 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:17:56,481 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:17:56,481 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:17:56,482 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:17:56,482 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:17:56,483 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:17:56,483 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:17:56,483 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:17:56,484 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:17:56,486 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:17:56,486 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:17:56,487 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:17:56,487 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:17:56,487 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:17:56,488 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:17:56,488 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:17:56,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:17:56,496 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:17:56,496 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:17:56,497 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:17:56,497 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:17:56,497 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:17:56,498 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:17:56,498 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:17:56,498 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:17:56,498 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:17:56,499 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:17:56,499 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:17:56,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:17:56,499 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:17:56,530 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:17:56,531 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:17:56,531 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:17:56,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:17:56,532 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:17:56,532 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:17:56,532 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:17:56,533 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:17:56,533 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f [2024-10-31 22:17:56,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:17:56,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:17:56,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:17:56,854 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:17:56,854 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:17:56,855 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/array-tiling/pnr2.c Unable to find full path for "g++" [2024-10-31 22:17:59,180 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:17:59,380 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:17:59,380 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/sv-benchmarks/c/array-tiling/pnr2.c [2024-10-31 22:17:59,388 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/data/e7953ec88/a08e84b458394b7fa4911e866f52bce8/FLAG228440f1e [2024-10-31 22:17:59,762 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/data/e7953ec88/a08e84b458394b7fa4911e866f52bce8 [2024-10-31 22:17:59,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:17:59,765 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:17:59,767 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:17:59,767 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:17:59,773 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:17:59,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:17:59" (1/1) ... [2024-10-31 22:17:59,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b5d13af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:59, skipping insertion in model container [2024-10-31 22:17:59,775 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:17:59" (1/1) ... [2024-10-31 22:17:59,799 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:17:59,982 WARN L251 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_6a3c65ce-ea9e-423b-89ca-eaf75956732e/sv-benchmarks/c/array-tiling/pnr2.c[395,408] [2024-10-31 22:18:00,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:18:00,017 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:18:00,030 WARN L251 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_6a3c65ce-ea9e-423b-89ca-eaf75956732e/sv-benchmarks/c/array-tiling/pnr2.c[395,408] [2024-10-31 22:18:00,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:18:00,055 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:18:00,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:00 WrapperNode [2024-10-31 22:18:00,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:18:00,057 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:18:00,057 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:18:00,057 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:18:00,065 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:00" (1/1) ... [2024-10-31 22:18:00,072 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:00" (1/1) ... [2024-10-31 22:18:00,092 INFO L138 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2024-10-31 22:18:00,095 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:18:00,096 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:18:00,096 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:18:00,096 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:18:00,109 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:00" (1/1) ... [2024-10-31 22:18:00,109 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:00" (1/1) ... [2024-10-31 22:18:00,111 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:00" (1/1) ... [2024-10-31 22:18:00,135 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 7, 5]. 50 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 4 writes are split as follows [0, 0, 4]. [2024-10-31 22:18:00,136 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:00" (1/1) ... [2024-10-31 22:18:00,136 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:00" (1/1) ... [2024-10-31 22:18:00,142 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:00" (1/1) ... [2024-10-31 22:18:00,146 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:00" (1/1) ... [2024-10-31 22:18:00,147 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:00" (1/1) ... [2024-10-31 22:18:00,149 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:00" (1/1) ... [2024-10-31 22:18:00,150 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:18:00,151 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:18:00,152 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:18:00,152 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:18:00,153 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:00" (1/1) ... [2024-10-31 22:18:00,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:18:00,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:00,191 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:18:00,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:18:00,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:18:00,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:18:00,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:18:00,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:18:00,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:18:00,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:18:00,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:18:00,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:18:00,258 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2024-10-31 22:18:00,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2024-10-31 22:18:00,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:18:00,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:18:00,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:18:00,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:18:00,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:18:00,354 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:18:00,356 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:18:00,552 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-10-31 22:18:00,553 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:18:00,568 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:18:00,568 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:18:00,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:18:00 BoogieIcfgContainer [2024-10-31 22:18:00,569 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:18:00,572 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:18:00,572 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:18:00,576 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:18:00,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:17:59" (1/3) ... [2024-10-31 22:18:00,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66515980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:18:00, skipping insertion in model container [2024-10-31 22:18:00,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:00" (2/3) ... [2024-10-31 22:18:00,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66515980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:18:00, skipping insertion in model container [2024-10-31 22:18:00,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:18:00" (3/3) ... [2024-10-31 22:18:00,580 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr2.c [2024-10-31 22:18:00,603 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:18:00,603 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:18:00,659 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:18:00,666 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;@8c9d787, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:18:00,667 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:18:00,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:18:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-31 22:18:00,682 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:18:00,683 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:00,683 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:18:00,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1808077575, now seen corresponding path program 1 times [2024-10-31 22:18:00,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:00,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425716651] [2024-10-31 22:18:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:00,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:01,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:01,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425716651] [2024-10-31 22:18:01,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425716651] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:18:01,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:18:01,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:18:01,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457829235] [2024-10-31 22:18:01,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:18:01,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:18:01,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:01,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:18:01,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:18:01,394 INFO L87 Difference]: Start difference. First operand has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2024-10-31 22:18:01,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:18:01,564 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2024-10-31 22:18:01,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:18:01,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 [2024-10-31 22:18:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:18:01,576 INFO L225 Difference]: With dead ends: 68 [2024-10-31 22:18:01,576 INFO L226 Difference]: Without dead ends: 32 [2024-10-31 22:18:01,579 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:18:01,585 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:18:01,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 44 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:18:01,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-31 22:18:01,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2024-10-31 22:18:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:18:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-31 22:18:01,635 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2024-10-31 22:18:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:18:01,636 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-31 22:18:01,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2024-10-31 22:18:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-31 22:18:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-31 22:18:01,638 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:18:01,639 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:01,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:18:01,639 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:18:01,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:01,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1032504238, now seen corresponding path program 1 times [2024-10-31 22:18:01,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:01,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654483973] [2024-10-31 22:18:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:01,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:02,408 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-31 22:18:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:02,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:18:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:18:02,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:02,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654483973] [2024-10-31 22:18:02,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654483973] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:18:02,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645669882] [2024-10-31 22:18:02,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:02,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:02,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:02,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:02,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:18:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:02,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-31 22:18:02,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:02,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:18:02,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-10-31 22:18:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:18:02,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:18:02,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-31 22:18:02,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-31 22:18:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:18:02,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645669882] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:18:02,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:18:02,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2024-10-31 22:18:02,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015737758] [2024-10-31 22:18:02,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:18:02,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:18:02,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:02,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:18:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:18:02,950 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:18:03,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:18:03,246 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2024-10-31 22:18:03,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:18:03,247 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2024-10-31 22:18:03,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:18:03,248 INFO L225 Difference]: With dead ends: 65 [2024-10-31 22:18:03,249 INFO L226 Difference]: Without dead ends: 63 [2024-10-31 22:18:03,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:18:03,250 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 57 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:18:03,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 147 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:18:03,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-31 22:18:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2024-10-31 22:18:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:18:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-10-31 22:18:03,273 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 25 [2024-10-31 22:18:03,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:18:03,273 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-10-31 22:18:03,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:18:03,274 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-10-31 22:18:03,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-31 22:18:03,275 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:18:03,275 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:03,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:18:03,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:03,476 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:18:03,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:03,477 INFO L85 PathProgramCache]: Analyzing trace with hash 445698224, now seen corresponding path program 1 times [2024-10-31 22:18:03,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:03,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840137883] [2024-10-31 22:18:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:03,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:03,898 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-31 22:18:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:03,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:18:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:18:03,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:03,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840137883] [2024-10-31 22:18:03,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840137883] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:18:03,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978879336] [2024-10-31 22:18:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:03,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:03,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:03,922 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:03,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:18:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:04,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-31 22:18:04,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:04,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:18:04,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-31 22:18:04,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:18:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:04,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:18:04,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-31 22:18:04,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-31 22:18:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:18:04,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978879336] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:18:04,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:18:04,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 23 [2024-10-31 22:18:04,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430935526] [2024-10-31 22:18:04,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:18:04,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:18:04,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:04,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:18:04,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:18:04,886 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:18:05,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:18:05,781 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2024-10-31 22:18:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-31 22:18:05,782 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 25 [2024-10-31 22:18:05,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:18:05,785 INFO L225 Difference]: With dead ends: 83 [2024-10-31 22:18:05,787 INFO L226 Difference]: Without dead ends: 81 [2024-10-31 22:18:05,788 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2024-10-31 22:18:05,790 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 279 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 22:18:05,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 160 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 22:18:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-31 22:18:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 27. [2024-10-31 22:18:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:18:05,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-10-31 22:18:05,811 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 25 [2024-10-31 22:18:05,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:18:05,812 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-10-31 22:18:05,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:18:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-10-31 22:18:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-31 22:18:05,816 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:18:05,816 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:05,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:18:06,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:06,020 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:18:06,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:06,021 INFO L85 PathProgramCache]: Analyzing trace with hash 921940004, now seen corresponding path program 1 times [2024-10-31 22:18:06,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:06,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984073107] [2024-10-31 22:18:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:06,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:06,469 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-31 22:18:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:06,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:18:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:18:06,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:06,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984073107] [2024-10-31 22:18:06,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984073107] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:18:06,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252438486] [2024-10-31 22:18:06,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:06,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:06,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:06,492 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:06,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:18:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:06,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:18:06,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:06,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:18:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:18:06,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:18:06,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-31 22:18:06,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-31 22:18:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:18:06,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252438486] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:18:06,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:18:06,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2024-10-31 22:18:06,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557227951] [2024-10-31 22:18:06,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:18:06,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:18:06,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:06,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:18:06,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:18:06,863 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:18:07,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:18:07,070 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2024-10-31 22:18:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:18:07,071 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-10-31 22:18:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:18:07,072 INFO L225 Difference]: With dead ends: 60 [2024-10-31 22:18:07,072 INFO L226 Difference]: Without dead ends: 58 [2024-10-31 22:18:07,073 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:18:07,074 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:18:07,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 153 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:18:07,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-31 22:18:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2024-10-31 22:18:07,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:18:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-10-31 22:18:07,094 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 29 [2024-10-31 22:18:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:18:07,094 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-10-31 22:18:07,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:18:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-10-31 22:18:07,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-31 22:18:07,095 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:18:07,095 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:07,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:18:07,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:07,297 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:18:07,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:07,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1623004582, now seen corresponding path program 1 times [2024-10-31 22:18:07,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:07,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878453869] [2024-10-31 22:18:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:07,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:07,747 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-31 22:18:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:07,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:18:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:18:07,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:07,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878453869] [2024-10-31 22:18:07,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878453869] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:18:07,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651735767] [2024-10-31 22:18:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:07,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:07,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:07,776 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:07,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:18:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:07,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-31 22:18:07,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:08,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:18:08,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:18:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:18:08,330 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:18:08,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-31 22:18:08,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-10-31 22:18:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:18:08,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651735767] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:18:08,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:18:08,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2024-10-31 22:18:08,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674015413] [2024-10-31 22:18:08,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:18:08,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:18:08,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:08,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:18:08,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:18:08,598 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 22:18:09,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:18:09,299 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2024-10-31 22:18:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:18:09,300 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2024-10-31 22:18:09,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:18:09,301 INFO L225 Difference]: With dead ends: 81 [2024-10-31 22:18:09,301 INFO L226 Difference]: Without dead ends: 79 [2024-10-31 22:18:09,302 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2024-10-31 22:18:09,303 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 122 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 22:18:09,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 255 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 22:18:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-31 22:18:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 31. [2024-10-31 22:18:09,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:18:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-10-31 22:18:09,325 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 29 [2024-10-31 22:18:09,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:18:09,325 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-10-31 22:18:09,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 22:18:09,326 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-10-31 22:18:09,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-31 22:18:09,328 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:18:09,328 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:09,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:18:09,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:09,533 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:18:09,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:09,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1082487194, now seen corresponding path program 2 times [2024-10-31 22:18:09,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:09,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041810677] [2024-10-31 22:18:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:09,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:09,838 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-31 22:18:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:09,844 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:18:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:18:09,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:09,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041810677] [2024-10-31 22:18:09,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041810677] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:18:09,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550446508] [2024-10-31 22:18:09,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:18:09,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:09,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:09,853 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:09,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:18:09,932 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:18:09,932 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:18:09,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:18:09,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:18:10,332 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:18:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:18:10,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550446508] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:18:10,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:18:10,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2024-10-31 22:18:10,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451658660] [2024-10-31 22:18:10,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:18:10,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 22:18:10,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:10,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 22:18:10,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2024-10-31 22:18:10,563 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 22:18:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:18:10,931 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2024-10-31 22:18:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:18:10,936 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2024-10-31 22:18:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:18:10,937 INFO L225 Difference]: With dead ends: 64 [2024-10-31 22:18:10,937 INFO L226 Difference]: Without dead ends: 48 [2024-10-31 22:18:10,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2024-10-31 22:18:10,939 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 136 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:18:10,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 83 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:18:10,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-31 22:18:10,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2024-10-31 22:18:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:18:10,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2024-10-31 22:18:10,962 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 33 [2024-10-31 22:18:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:18:10,966 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2024-10-31 22:18:10,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 22:18:10,967 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2024-10-31 22:18:10,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-31 22:18:10,968 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:18:10,968 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:10,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:18:11,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:11,169 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:18:11,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:11,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1606558351, now seen corresponding path program 3 times [2024-10-31 22:18:11,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:11,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70741124] [2024-10-31 22:18:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:11,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:11,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-31 22:18:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:11,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:18:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:11,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-31 22:18:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:11,767 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-31 22:18:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 22:18:11,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:11,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70741124] [2024-10-31 22:18:11,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70741124] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:18:11,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682886683] [2024-10-31 22:18:11,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:18:11,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:11,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:11,775 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:11,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:18:11,869 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:18:11,869 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:18:11,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-31 22:18:11,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:12,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:18:12,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-10-31 22:18:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 22:18:12,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:18:12,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-31 22:18:12,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-31 22:18:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 22:18:12,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682886683] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:18:12,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:18:12,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 24 [2024-10-31 22:18:12,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229865506] [2024-10-31 22:18:12,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:18:12,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 22:18:12,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:12,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 22:18:12,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2024-10-31 22:18:12,437 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 9 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-10-31 22:18:13,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:18:13,176 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2024-10-31 22:18:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 22:18:13,177 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 9 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 47 [2024-10-31 22:18:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:18:13,179 INFO L225 Difference]: With dead ends: 98 [2024-10-31 22:18:13,179 INFO L226 Difference]: Without dead ends: 96 [2024-10-31 22:18:13,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2024-10-31 22:18:13,181 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 162 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 22:18:13,182 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 269 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 22:18:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-31 22:18:13,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 52. [2024-10-31 22:18:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:18:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2024-10-31 22:18:13,204 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 47 [2024-10-31 22:18:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:18:13,205 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2024-10-31 22:18:13,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 9 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-10-31 22:18:13,205 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2024-10-31 22:18:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-31 22:18:13,209 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:18:13,209 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:13,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:18:13,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:13,410 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:18:13,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:13,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2029260177, now seen corresponding path program 1 times [2024-10-31 22:18:13,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:13,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957896408] [2024-10-31 22:18:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:13,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:13,863 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-31 22:18:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:13,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:18:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:13,877 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-31 22:18:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:13,882 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-31 22:18:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 22:18:13,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:13,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957896408] [2024-10-31 22:18:13,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957896408] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:18:13,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734502880] [2024-10-31 22:18:13,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:13,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:13,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:13,889 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:13,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:18:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:13,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-31 22:18:13,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:14,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:18:14,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-31 22:18:14,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:18:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:18:14,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:18:14,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-31 22:18:14,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-10-31 22:18:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 22:18:15,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734502880] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:18:15,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:18:15,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 31 [2024-10-31 22:18:15,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189946338] [2024-10-31 22:18:15,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:18:15,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-31 22:18:15,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-31 22:18:15,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2024-10-31 22:18:15,038 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-10-31 22:18:20,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:18:24,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:18:28,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:18:32,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:18:32,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:18:32,641 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2024-10-31 22:18:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-31 22:18:32,642 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 47 [2024-10-31 22:18:32,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:18:32,643 INFO L225 Difference]: With dead ends: 146 [2024-10-31 22:18:32,643 INFO L226 Difference]: Without dead ends: 144 [2024-10-31 22:18:32,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=554, Invalid=2416, Unknown=0, NotChecked=0, Total=2970 [2024-10-31 22:18:32,647 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 335 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 142 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2024-10-31 22:18:32,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 302 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 551 Invalid, 4 Unknown, 0 Unchecked, 16.8s Time] [2024-10-31 22:18:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-10-31 22:18:32,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 55. [2024-10-31 22:18:32,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-31 22:18:32,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-10-31 22:18:32,682 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 47 [2024-10-31 22:18:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:18:32,682 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-10-31 22:18:32,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-10-31 22:18:32,683 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-10-31 22:18:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 22:18:32,685 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:18:32,685 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:32,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:18:32,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-31 22:18:32,889 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:18:32,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:32,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1632717179, now seen corresponding path program 4 times [2024-10-31 22:18:32,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:32,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499855509] [2024-10-31 22:18:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:32,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:33,349 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-31 22:18:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:33,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:18:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:33,358 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-31 22:18:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:33,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-31 22:18:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 22:18:33,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:33,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499855509] [2024-10-31 22:18:33,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499855509] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:18:33,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607441357] [2024-10-31 22:18:33,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:18:33,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:33,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:33,370 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:33,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a3c65ce-ea9e-423b-89ca-eaf75956732e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:18:33,459 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:18:33,459 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:18:33,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 22:18:33,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:33,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-31 22:18:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 22:18:33,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:18:33,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-31 22:18:33,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-31 22:18:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 22:18:33,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607441357] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:18:33,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:18:33,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2024-10-31 22:18:33,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521025420] [2024-10-31 22:18:33,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:18:33,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:18:33,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:33,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:18:33,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:18:33,902 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)