./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/running_example.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-data/running_example.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ --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 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:37:21,586 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:37:21,713 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 21:37:21,720 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:37:21,721 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:37:21,762 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:37:21,763 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:37:21,763 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:37:21,764 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 21:37:21,769 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 21:37:21,770 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:37:21,771 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:37:21,772 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:37:21,774 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:37:21,774 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:37:21,775 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:37:21,775 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:37:21,776 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:37:21,776 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:37:21,777 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:37:21,777 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:37:21,779 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:37:21,780 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:37:21,780 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:37:21,781 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:37:21,781 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:37:21,781 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:37:21,782 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:37:21,783 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:37:21,783 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:37:21,785 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:37:21,785 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:37:21,785 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:37:21,785 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:37:21,786 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:37:21,786 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 21:37:21,786 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:37:21,786 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:37:21,787 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:37:21,787 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:37:21,787 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:37:21,787 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:37:21,788 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_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f [2023-11-23 21:37:22,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:37:22,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:37:22,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:37:22,178 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:37:22,178 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:37:22,180 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/heap-data/running_example.i [2023-11-23 21:37:25,311 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:37:25,559 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:37:25,559 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/sv-benchmarks/c/heap-data/running_example.i [2023-11-23 21:37:25,578 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/data/93c8cc96e/e48ae167694f45c986f2ff8277f51b3f/FLAGc311e244f [2023-11-23 21:37:25,600 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/data/93c8cc96e/e48ae167694f45c986f2ff8277f51b3f [2023-11-23 21:37:25,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:37:25,607 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:37:25,611 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:37:25,611 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:37:25,616 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:37:25,617 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:37:25" (1/1) ... [2023-11-23 21:37:25,618 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@233ad476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:25, skipping insertion in model container [2023-11-23 21:37:25,618 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:37:25" (1/1) ... [2023-11-23 21:37:25,680 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:37:26,065 WARN L240 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_deaea85a-4465-4e1f-8faa-d8de9526a031/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2023-11-23 21:37:26,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:37:26,083 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:37:26,143 WARN L240 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_deaea85a-4465-4e1f-8faa-d8de9526a031/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2023-11-23 21:37:26,144 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:37:26,184 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:37:26,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26 WrapperNode [2023-11-23 21:37:26,184 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:37:26,186 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:37:26,187 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:37:26,187 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:37:26,195 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:26,209 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:26,231 INFO L138 Inliner]: procedures = 121, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2023-11-23 21:37:26,232 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:37:26,233 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:37:26,233 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:37:26,233 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:37:26,244 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:26,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:26,262 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:26,284 INFO L189 HeapSplitter]: Split 15 memory accesses to 2 slices as follows [2, 13] [2023-11-23 21:37:26,284 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:26,285 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:26,296 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:26,303 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:26,310 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:26,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:26,320 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:37:26,325 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:37:26,325 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:37:26,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:37:26,326 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:26,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:37:26,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:26,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:37:26,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:37:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 21:37:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 21:37:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 21:37:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 21:37:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:37:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:37:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 21:37:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 21:37:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 21:37:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 21:37:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 21:37:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 21:37:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:37:26,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:37:26,566 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:37:26,567 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:37:26,725 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:37:26,750 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:37:26,751 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 21:37:26,751 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:37:26 BoogieIcfgContainer [2023-11-23 21:37:26,752 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:37:26,754 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:37:26,755 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:37:26,758 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:37:26,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:37:25" (1/3) ... [2023-11-23 21:37:26,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bea8b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:37:26, skipping insertion in model container [2023-11-23 21:37:26,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (2/3) ... [2023-11-23 21:37:26,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bea8b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:37:26, skipping insertion in model container [2023-11-23 21:37:26,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:37:26" (3/3) ... [2023-11-23 21:37:26,761 INFO L112 eAbstractionObserver]: Analyzing ICFG running_example.i [2023-11-23 21:37:26,782 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:37:26,782 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:37:26,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:37:26,834 INFO L357 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, mHoare=true, 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;@59b02955, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:37:26,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:37:26,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 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) [2023-11-23 21:37:26,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:37:26,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:26,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:26,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:26,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1646938671, now seen corresponding path program 1 times [2023-11-23 21:37:26,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:26,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229794792] [2023-11-23 21:37:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:26,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:27,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:27,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229794792] [2023-11-23 21:37:27,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229794792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:27,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:27,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:37:27,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721649861] [2023-11-23 21:37:27,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:27,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:37:27,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:27,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:37:27,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:37:27,191 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-11-23 21:37:27,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:27,211 INFO L93 Difference]: Finished difference Result 25 states and 41 transitions. [2023-11-23 21:37:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:37:27,222 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2023-11-23 21:37:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:27,230 INFO L225 Difference]: With dead ends: 25 [2023-11-23 21:37:27,232 INFO L226 Difference]: Without dead ends: 14 [2023-11-23 21:37:27,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:37:27,240 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:27,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-23 21:37:27,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-23 21:37:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2023-11-23 21:37:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2023-11-23 21:37:27,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 7 [2023-11-23 21:37:27,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:27,275 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2023-11-23 21:37:27,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-11-23 21:37:27,276 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2023-11-23 21:37:27,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:37:27,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:27,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:27,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:37:27,279 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:27,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:27,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1234098151, now seen corresponding path program 1 times [2023-11-23 21:37:27,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:27,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864459086] [2023-11-23 21:37:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:27,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:27,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:27,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864459086] [2023-11-23 21:37:27,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864459086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:27,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:27,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:27,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256187875] [2023-11-23 21:37:27,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:27,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:37:27,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:27,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:37:27,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:27,747 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-11-23 21:37:27,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:27,860 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2023-11-23 21:37:27,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:27,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2023-11-23 21:37:27,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:27,863 INFO L225 Difference]: With dead ends: 34 [2023-11-23 21:37:27,863 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 21:37:27,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:37:27,865 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:27,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:37:27,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 21:37:27,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2023-11-23 21:37:27,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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) [2023-11-23 21:37:27,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2023-11-23 21:37:27,873 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2023-11-23 21:37:27,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:27,874 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2023-11-23 21:37:27,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-11-23 21:37:27,874 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2023-11-23 21:37:27,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:37:27,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:27,875 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:27,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:37:27,876 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:27,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:27,877 INFO L85 PathProgramCache]: Analyzing trace with hash -825321697, now seen corresponding path program 1 times [2023-11-23 21:37:27,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:27,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468025464] [2023-11-23 21:37:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:27,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:28,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:28,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468025464] [2023-11-23 21:37:28,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468025464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:28,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247054130] [2023-11-23 21:37:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:28,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:28,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:28,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:28,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:37:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:28,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 21:37:28,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:28,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:37:28,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 21:37:28,853 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 39 treesize of output 22 [2023-11-23 21:37:28,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:28,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 11 [2023-11-23 21:37:28,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:37:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:28,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:29,048 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_88 (Array Int Int)) (v_ArrVal_87 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_19| Int)) (or (< 9 (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_main_~tail~0#1.base| v_ArrVal_88) |v_ULTIMATE.start_main_~p~0#1.base_19| v_ArrVal_87) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|)) (not (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~tail~0#1.offset| 4))) (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse0 (select v_ArrVal_88 .cse0))) v_ArrVal_88)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_19|) 0)))) is different from false [2023-11-23 21:37:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-23 21:37:29,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247054130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:37:29,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:37:29,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-11-23 21:37:29,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004380307] [2023-11-23 21:37:29,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:37:29,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:37:29,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:29,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:37:29,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=80, Unknown=1, NotChecked=18, Total=132 [2023-11-23 21:37:29,133 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 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) [2023-11-23 21:37:29,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:29,484 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2023-11-23 21:37:29,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:37:29,484 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 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 13 [2023-11-23 21:37:29,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:29,485 INFO L225 Difference]: With dead ends: 65 [2023-11-23 21:37:29,486 INFO L226 Difference]: Without dead ends: 56 [2023-11-23 21:37:29,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=206, Unknown=1, NotChecked=32, Total=342 [2023-11-23 21:37:29,488 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 76 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:29,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 102 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2023-11-23 21:37:29,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-23 21:37:29,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2023-11-23 21:37:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 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) [2023-11-23 21:37:29,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 51 transitions. [2023-11-23 21:37:29,498 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 51 transitions. Word has length 13 [2023-11-23 21:37:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:29,498 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 51 transitions. [2023-11-23 21:37:29,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 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) [2023-11-23 21:37:29,499 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 51 transitions. [2023-11-23 21:37:29,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:37:29,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:29,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:29,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:37:29,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:29,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:29,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:29,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1998928062, now seen corresponding path program 1 times [2023-11-23 21:37:29,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:29,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628359864] [2023-11-23 21:37:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:29,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:30,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:30,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628359864] [2023-11-23 21:37:30,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628359864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:30,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915027762] [2023-11-23 21:37:30,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:30,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:30,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:30,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:30,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:37:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:30,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 21:37:30,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:30,177 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 18 treesize of output 7 [2023-11-23 21:37:30,183 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 18 treesize of output 7 [2023-11-23 21:37:30,298 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 [2023-11-23 21:37:30,308 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 [2023-11-23 21:37:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:30,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:30,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915027762] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:37:30,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:37:30,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-23 21:37:30,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801226678] [2023-11-23 21:37:30,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:37:30,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:37:30,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:30,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:37:30,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:37:30,400 INFO L87 Difference]: Start difference. First operand 35 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2023-11-23 21:37:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:30,567 INFO L93 Difference]: Finished difference Result 81 states and 116 transitions. [2023-11-23 21:37:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:37:30,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 15 [2023-11-23 21:37:30,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:30,568 INFO L225 Difference]: With dead ends: 81 [2023-11-23 21:37:30,569 INFO L226 Difference]: Without dead ends: 62 [2023-11-23 21:37:30,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:37:30,570 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:30,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 50 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:37:30,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-23 21:37:30,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2023-11-23 21:37:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 54 states have internal predecessors, (80), 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) [2023-11-23 21:37:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 80 transitions. [2023-11-23 21:37:30,587 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 80 transitions. Word has length 15 [2023-11-23 21:37:30,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:30,588 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 80 transitions. [2023-11-23 21:37:30,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2023-11-23 21:37:30,588 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 80 transitions. [2023-11-23 21:37:30,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:37:30,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:30,589 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:30,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:37:30,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:30,804 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:30,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:30,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1187174786, now seen corresponding path program 1 times [2023-11-23 21:37:30,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:30,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932403670] [2023-11-23 21:37:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:30,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:31,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:31,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932403670] [2023-11-23 21:37:31,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932403670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:31,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142055075] [2023-11-23 21:37:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:31,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:31,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:31,061 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:31,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:37:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:31,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:37:31,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:31,171 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 [2023-11-23 21:37:31,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 21:37:31,328 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 [2023-11-23 21:37:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:31,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:31,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142055075] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:37:31,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:37:31,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2023-11-23 21:37:31,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818714994] [2023-11-23 21:37:31,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:37:31,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:37:31,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:31,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:37:31,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:37:31,422 INFO L87 Difference]: Start difference. First operand 55 states and 80 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:31,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:31,820 INFO L93 Difference]: Finished difference Result 153 states and 207 transitions. [2023-11-23 21:37:31,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 21:37:31,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-23 21:37:31,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:31,822 INFO L225 Difference]: With dead ends: 153 [2023-11-23 21:37:31,823 INFO L226 Difference]: Without dead ends: 134 [2023-11-23 21:37:31,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2023-11-23 21:37:31,824 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:31,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 125 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:37:31,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-23 21:37:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 114. [2023-11-23 21:37:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.3982300884955752) internal successors, (158), 113 states have internal predecessors, (158), 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) [2023-11-23 21:37:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 158 transitions. [2023-11-23 21:37:31,855 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 158 transitions. Word has length 17 [2023-11-23 21:37:31,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:31,855 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 158 transitions. [2023-11-23 21:37:31,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:31,858 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 158 transitions. [2023-11-23 21:37:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:37:31,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:31,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:31,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:37:32,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:32,081 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:32,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:32,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1996523334, now seen corresponding path program 1 times [2023-11-23 21:37:32,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:32,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603686424] [2023-11-23 21:37:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:32,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:37:32,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:32,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603686424] [2023-11-23 21:37:32,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603686424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:32,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:32,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:32,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848811977] [2023-11-23 21:37:32,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:32,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:37:32,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:32,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:37:32,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:32,200 INFO L87 Difference]: Start difference. First operand 114 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:32,288 INFO L93 Difference]: Finished difference Result 157 states and 216 transitions. [2023-11-23 21:37:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:32,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-23 21:37:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:32,292 INFO L225 Difference]: With dead ends: 157 [2023-11-23 21:37:32,292 INFO L226 Difference]: Without dead ends: 115 [2023-11-23 21:37:32,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:37:32,294 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:32,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 41 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-23 21:37:32,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2023-11-23 21:37:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.3893805309734513) internal successors, (157), 113 states have internal predecessors, (157), 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) [2023-11-23 21:37:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 157 transitions. [2023-11-23 21:37:32,360 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 157 transitions. Word has length 17 [2023-11-23 21:37:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:32,360 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 157 transitions. [2023-11-23 21:37:32,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 157 transitions. [2023-11-23 21:37:32,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:37:32,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:32,362 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:32,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:37:32,362 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:32,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:32,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1926163675, now seen corresponding path program 2 times [2023-11-23 21:37:32,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:32,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176771996] [2023-11-23 21:37:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:32,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:32,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:32,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176771996] [2023-11-23 21:37:32,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176771996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:32,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838461791] [2023-11-23 21:37:32,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:37:32,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:32,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:32,754 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:32,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:37:32,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:37:32,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:37:32,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 21:37:32,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:32,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 21:37:32,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:37:32,978 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2023-11-23 21:37:32,998 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 21:37:32,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-23 21:37:33,015 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 21:37:33,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 21:37:33,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-11-23 21:37:33,108 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 16 treesize of output 11 [2023-11-23 21:37:33,131 INFO L349 Elim1Store]: treesize reduction 14, result has 39.1 percent of original size [2023-11-23 21:37:33,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-11-23 21:37:33,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-23 21:37:33,207 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 [2023-11-23 21:37:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:33,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:33,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:33,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2023-11-23 21:37:33,264 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_294 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_27| Int)) (or (< 9 (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_main_~tail~0#1.base| v_ArrVal_294) |v_ULTIMATE.start_main_~p~0#1.base_27| v_arrayElimArr_3) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|)) (< (select v_arrayElimArr_3 0) 10))) is different from false [2023-11-23 21:37:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-11-23 21:37:33,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838461791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:37:33,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:37:33,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-23 21:37:33,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021842394] [2023-11-23 21:37:33,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:37:33,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 21:37:33,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:33,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 21:37:33,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=141, Unknown=2, NotChecked=24, Total=210 [2023-11-23 21:37:33,404 INFO L87 Difference]: Start difference. First operand 114 states and 157 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 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) [2023-11-23 21:37:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:34,223 INFO L93 Difference]: Finished difference Result 163 states and 223 transitions. [2023-11-23 21:37:34,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:37:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-23 21:37:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:34,225 INFO L225 Difference]: With dead ends: 163 [2023-11-23 21:37:34,225 INFO L226 Difference]: Without dead ends: 154 [2023-11-23 21:37:34,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=325, Unknown=2, NotChecked=40, Total=506 [2023-11-23 21:37:34,227 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 158 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:34,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 91 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 118 Invalid, 0 Unknown, 56 Unchecked, 0.5s Time] [2023-11-23 21:37:34,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-23 21:37:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2023-11-23 21:37:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.385321100917431) internal successors, (151), 109 states have internal predecessors, (151), 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) [2023-11-23 21:37:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 151 transitions. [2023-11-23 21:37:34,252 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 151 transitions. Word has length 17 [2023-11-23 21:37:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:34,252 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 151 transitions. [2023-11-23 21:37:34,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 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) [2023-11-23 21:37:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 151 transitions. [2023-11-23 21:37:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:37:34,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:34,254 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:34,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-23 21:37:34,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:34,471 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:34,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:34,471 INFO L85 PathProgramCache]: Analyzing trace with hash 948853192, now seen corresponding path program 1 times [2023-11-23 21:37:34,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:34,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986889658] [2023-11-23 21:37:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:34,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:35,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:35,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986889658] [2023-11-23 21:37:35,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986889658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:35,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428208517] [2023-11-23 21:37:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:35,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:35,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:35,384 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:35,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:37:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:35,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-23 21:37:35,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:35,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 21:37:35,607 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-23 21:37:35,613 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-23 21:37:35,629 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 21:37:35,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 69 [2023-11-23 21:37:35,645 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-23 21:37:35,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-23 21:37:35,652 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 27 treesize of output 1 [2023-11-23 21:37:35,658 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 11 [2023-11-23 21:37:35,817 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 [2023-11-23 21:37:35,824 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 35 treesize of output 19 [2023-11-23 21:37:35,829 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 20 treesize of output 15 [2023-11-23 21:37:35,849 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 27 treesize of output 15 [2023-11-23 21:37:35,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-11-23 21:37:35,888 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 [2023-11-23 21:37:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:35,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:36,006 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_377 (Array Int Int))) (< 9 (let ((.cse0 (+ |c_ULTIMATE.start_main_~list~0#1.offset| 4))) (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_377) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~list~0#1.base|) .cse0)) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~list~0#1.base|) .cse0))))) is different from false [2023-11-23 21:37:36,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:36,043 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 57 [2023-11-23 21:37:36,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:36,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 105 [2023-11-23 21:37:36,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:36,072 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 78 [2023-11-23 21:37:36,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:36,082 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 60 [2023-11-23 21:37:36,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:36,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 131 [2023-11-23 21:37:36,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:36,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 167 [2023-11-23 21:37:36,165 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 95 treesize of output 83 [2023-11-23 21:37:36,179 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 71 treesize of output 55 [2023-11-23 21:37:36,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:36,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 50 [2023-11-23 21:37:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-23 21:37:36,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428208517] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:37:36,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:37:36,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2023-11-23 21:37:36,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927514943] [2023-11-23 21:37:36,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:37:36,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 21:37:36,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:36,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 21:37:36,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=197, Unknown=6, NotChecked=28, Total=272 [2023-11-23 21:37:36,696 INFO L87 Difference]: Start difference. First operand 110 states and 151 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:37,622 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2023-11-23 21:37:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 21:37:37,623 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-23 21:37:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:37,624 INFO L225 Difference]: With dead ends: 177 [2023-11-23 21:37:37,625 INFO L226 Difference]: Without dead ends: 175 [2023-11-23 21:37:37,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=705, Unknown=6, NotChecked=56, Total=930 [2023-11-23 21:37:37,626 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 267 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:37,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 189 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 274 Invalid, 0 Unknown, 103 Unchecked, 0.4s Time] [2023-11-23 21:37:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-23 21:37:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2023-11-23 21:37:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.411764705882353) internal successors, (192), 136 states have internal predecessors, (192), 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) [2023-11-23 21:37:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 192 transitions. [2023-11-23 21:37:37,657 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 192 transitions. Word has length 19 [2023-11-23 21:37:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:37,657 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 192 transitions. [2023-11-23 21:37:37,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 192 transitions. [2023-11-23 21:37:37,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:37:37,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:37,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:37,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:37:37,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 21:37:37,881 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:37,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:37,881 INFO L85 PathProgramCache]: Analyzing trace with hash 948855114, now seen corresponding path program 1 times [2023-11-23 21:37:37,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:37,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793614438] [2023-11-23 21:37:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:37,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:38,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:38,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793614438] [2023-11-23 21:37:38,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793614438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:38,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824706167] [2023-11-23 21:37:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:38,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:38,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:38,591 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:38,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:37:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:38,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-23 21:37:38,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:38,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 21:37:38,814 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-23 21:37:38,830 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 21:37:38,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 77 [2023-11-23 21:37:38,842 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-23 21:37:38,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-23 21:37:38,849 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 27 treesize of output 1 [2023-11-23 21:37:38,852 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2023-11-23 21:37:38,857 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 11 [2023-11-23 21:37:39,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-23 21:37:39,017 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 35 treesize of output 19 [2023-11-23 21:37:39,022 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 20 treesize of output 15 [2023-11-23 21:37:39,040 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 27 treesize of output 15 [2023-11-23 21:37:39,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-11-23 21:37:39,077 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 [2023-11-23 21:37:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:39,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:39,131 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_463 (Array Int Int))) (< (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_463) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0)) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0))) 21)) is different from false [2023-11-23 21:37:39,151 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_463 (Array Int Int))) (< (let ((.cse0 (+ |c_ULTIMATE.start_main_~list~0#1.offset| 4))) (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_463) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~list~0#1.base|) .cse0)) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~list~0#1.base|) .cse0))) 21)) is different from false [2023-11-23 21:37:39,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:39,181 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 57 [2023-11-23 21:37:39,195 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:39,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 105 [2023-11-23 21:37:39,206 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:39,206 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 80 [2023-11-23 21:37:39,216 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:39,217 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 62 [2023-11-23 21:37:39,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:39,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 101 [2023-11-23 21:37:39,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:39,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 110 [2023-11-23 21:37:39,279 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 73 treesize of output 57 [2023-11-23 21:37:39,289 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 57 treesize of output 45 [2023-11-23 21:37:39,309 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:39,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 50 [2023-11-23 21:37:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-11-23 21:37:39,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824706167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:37:39,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:37:39,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2023-11-23 21:37:39,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085770385] [2023-11-23 21:37:39,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:37:39,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 21:37:39,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 21:37:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=175, Unknown=2, NotChecked=54, Total=272 [2023-11-23 21:37:39,677 INFO L87 Difference]: Start difference. First operand 137 states and 192 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 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) [2023-11-23 21:37:40,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:40,445 INFO L93 Difference]: Finished difference Result 231 states and 323 transitions. [2023-11-23 21:37:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 21:37:40,445 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 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 19 [2023-11-23 21:37:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:40,447 INFO L225 Difference]: With dead ends: 231 [2023-11-23 21:37:40,447 INFO L226 Difference]: Without dead ends: 192 [2023-11-23 21:37:40,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=611, Unknown=2, NotChecked=106, Total=870 [2023-11-23 21:37:40,449 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 161 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:40,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 191 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 272 Invalid, 0 Unknown, 184 Unchecked, 0.3s Time] [2023-11-23 21:37:40,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-23 21:37:40,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 164. [2023-11-23 21:37:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.4171779141104295) internal successors, (231), 163 states have internal predecessors, (231), 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) [2023-11-23 21:37:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 231 transitions. [2023-11-23 21:37:40,479 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 231 transitions. Word has length 19 [2023-11-23 21:37:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:40,479 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 231 transitions. [2023-11-23 21:37:40,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 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) [2023-11-23 21:37:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 231 transitions. [2023-11-23 21:37:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:37:40,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:40,481 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:40,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:37:40,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:40,702 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:40,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:40,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1247162244, now seen corresponding path program 1 times [2023-11-23 21:37:40,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:40,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548572310] [2023-11-23 21:37:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:40,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:37:40,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:40,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548572310] [2023-11-23 21:37:40,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548572310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:40,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736797406] [2023-11-23 21:37:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:40,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:40,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:40,922 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:40,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:37:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:41,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 21:37:41,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:41,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 21:37:41,193 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 [2023-11-23 21:37:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:37:41,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:41,245 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-23 21:37:41,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2023-11-23 21:37:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:37:41,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736797406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:37:41,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:37:41,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-11-23 21:37:41,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449328988] [2023-11-23 21:37:41,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:37:41,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:37:41,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:41,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:37:41,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:37:41,268 INFO L87 Difference]: Start difference. First operand 164 states and 231 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:41,612 INFO L93 Difference]: Finished difference Result 284 states and 390 transitions. [2023-11-23 21:37:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:37:41,613 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-23 21:37:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:41,614 INFO L225 Difference]: With dead ends: 284 [2023-11-23 21:37:41,615 INFO L226 Difference]: Without dead ends: 228 [2023-11-23 21:37:41,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:37:41,616 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 104 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:41,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 116 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:37:41,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-11-23 21:37:41,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 121. [2023-11-23 21:37:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.4416666666666667) internal successors, (173), 120 states have internal predecessors, (173), 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) [2023-11-23 21:37:41,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 173 transitions. [2023-11-23 21:37:41,642 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 173 transitions. Word has length 21 [2023-11-23 21:37:41,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:41,642 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 173 transitions. [2023-11-23 21:37:41,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:41,643 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 173 transitions. [2023-11-23 21:37:41,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:37:41,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:41,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:41,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:37:41,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:41,863 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:41,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:41,864 INFO L85 PathProgramCache]: Analyzing trace with hash 437813696, now seen corresponding path program 1 times [2023-11-23 21:37:41,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:41,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659015728] [2023-11-23 21:37:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:41,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:37:42,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:42,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659015728] [2023-11-23 21:37:42,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659015728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:42,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673211813] [2023-11-23 21:37:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:42,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:42,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:42,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:42,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:37:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:42,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:37:42,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:42,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-23 21:37:42,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:37:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:37:42,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:42,564 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-23 21:37:42,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 32 [2023-11-23 21:37:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:37:42,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673211813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:37:42,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:37:42,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-11-23 21:37:42,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262158679] [2023-11-23 21:37:42,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:37:42,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:37:42,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:42,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:37:42,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:37:42,590 INFO L87 Difference]: Start difference. First operand 121 states and 173 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:42,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:42,913 INFO L93 Difference]: Finished difference Result 165 states and 226 transitions. [2023-11-23 21:37:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:37:42,914 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-23 21:37:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:42,915 INFO L225 Difference]: With dead ends: 165 [2023-11-23 21:37:42,916 INFO L226 Difference]: Without dead ends: 138 [2023-11-23 21:37:42,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:37:42,917 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:42,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 110 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:37:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-23 21:37:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 117. [2023-11-23 21:37:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 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) [2023-11-23 21:37:42,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 171 transitions. [2023-11-23 21:37:42,936 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 171 transitions. Word has length 21 [2023-11-23 21:37:42,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:42,936 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 171 transitions. [2023-11-23 21:37:42,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:42,937 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 171 transitions. [2023-11-23 21:37:42,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:37:42,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:42,937 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:42,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:37:43,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:43,158 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:43,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:43,158 INFO L85 PathProgramCache]: Analyzing trace with hash 437815618, now seen corresponding path program 1 times [2023-11-23 21:37:43,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:43,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673685568] [2023-11-23 21:37:43,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:43,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:37:43,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:43,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673685568] [2023-11-23 21:37:43,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673685568] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:43,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121659645] [2023-11-23 21:37:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:43,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:43,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:43,403 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:43,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:37:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:43,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 21:37:43,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:43,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-23 21:37:43,755 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 [2023-11-23 21:37:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:37:43,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:44,045 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-23 21:37:44,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2023-11-23 21:37:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:37:44,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121659645] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:37:44,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:37:44,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-23 21:37:44,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22168116] [2023-11-23 21:37:44,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:37:44,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 21:37:44,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:44,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 21:37:44,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:37:44,059 INFO L87 Difference]: Start difference. First operand 117 states and 171 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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) [2023-11-23 21:37:44,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:44,875 INFO L93 Difference]: Finished difference Result 346 states and 496 transitions. [2023-11-23 21:37:44,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 21:37:44,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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 21 [2023-11-23 21:37:44,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:44,877 INFO L225 Difference]: With dead ends: 346 [2023-11-23 21:37:44,877 INFO L226 Difference]: Without dead ends: 291 [2023-11-23 21:37:44,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=402, Invalid=930, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 21:37:44,882 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:44,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 194 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:37:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-11-23 21:37:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 204. [2023-11-23 21:37:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.4827586206896552) internal successors, (301), 203 states have internal predecessors, (301), 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) [2023-11-23 21:37:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 301 transitions. [2023-11-23 21:37:44,933 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 301 transitions. Word has length 21 [2023-11-23 21:37:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:44,933 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 301 transitions. [2023-11-23 21:37:44,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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) [2023-11-23 21:37:44,934 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 301 transitions. [2023-11-23 21:37:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:37:44,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:44,938 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:44,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:37:45,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:45,160 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:45,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:45,160 INFO L85 PathProgramCache]: Analyzing trace with hash -410437298, now seen corresponding path program 2 times [2023-11-23 21:37:45,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:45,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925293862] [2023-11-23 21:37:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:45,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:46,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:46,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925293862] [2023-11-23 21:37:46,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925293862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:46,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554114893] [2023-11-23 21:37:46,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:37:46,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:46,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:46,290 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:46,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaea85a-4465-4e1f-8faa-d8de9526a031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:37:46,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:37:46,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:37:46,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-23 21:37:46,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:46,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 21:37:46,518 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 [2023-11-23 21:37:46,523 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-23 21:37:46,536 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 21:37:46,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-23 21:37:46,546 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-23 21:37:46,560 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 21:37:46,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-23 21:37:46,570 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 5 treesize of output 3 [2023-11-23 21:37:46,589 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-23 21:37:46,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-23 21:37:46,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:46,756 INFO L349 Elim1Store]: treesize reduction 44, result has 10.2 percent of original size [2023-11-23 21:37:46,757 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 78 [2023-11-23 21:37:46,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:46,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-11-23 21:37:46,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:46,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 11 [2023-11-23 21:37:46,788 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 21:37:46,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 14 [2023-11-23 21:37:46,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-23 21:37:47,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2023-11-23 21:37:47,031 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 35 treesize of output 19 [2023-11-23 21:37:47,043 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 [2023-11-23 21:37:47,090 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 27 treesize of output 15 [2023-11-23 21:37:47,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-11-23 21:37:47,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-23 21:37:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:47,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:47,624 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:37:47,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:47,651 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 103 [2023-11-23 21:37:47,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:47,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 75 [2023-11-23 21:37:47,693 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:47,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 283 [2023-11-23 21:37:47,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:47,709 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 220 [2023-11-23 21:37:47,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:47,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1520 treesize of output 1477 [2023-11-23 21:37:47,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:47,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1874 treesize of output 1838 [2023-11-23 21:37:47,933 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 275 treesize of output 235 [2023-11-23 21:37:48,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:48,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 455 treesize of output 473 [2023-11-23 21:37:48,050 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 434 treesize of output 382 [2023-11-23 21:37:48,091 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 219 treesize of output 195 [2023-11-23 21:37:48,131 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 390 treesize of output 326 [2023-11-23 21:38:07,343 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:38:07,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1249 treesize of output 1229