./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mlceu.c --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_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/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_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mlceu.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/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_c1996604-c1dc-4c5c-8e18-fd536d89fed0/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 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:37:16,344 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:37:16,413 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:37:16,419 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:37:16,420 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:37:16,445 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:37:16,446 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:37:16,447 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:37:16,448 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:37:16,448 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:37:16,449 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:37:16,449 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:37:16,450 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:37:16,451 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:37:16,452 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:37:16,452 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:37:16,453 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:37:16,453 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:37:16,454 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:37:16,455 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:37:16,455 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:37:16,456 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:37:16,457 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:37:16,457 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:37:16,458 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:37:16,459 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:37:16,459 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:37:16,460 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:37:16,461 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:37:16,461 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:37:16,462 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:37:16,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:37:16,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:37:16,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:37:16,464 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:37:16,465 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:37:16,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:37:16,466 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:37:16,466 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:37:16,467 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:37:16,467 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:37:16,468 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:37:16,468 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_c1996604-c1dc-4c5c-8e18-fd536d89fed0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 [2023-11-23 22:37:16,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:37:16,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:37:16,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:37:16,787 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:37:16,787 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:37:16,788 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/array-tiling/mlceu.c [2023-11-23 22:37:19,975 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:37:20,217 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:37:20,217 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/sv-benchmarks/c/array-tiling/mlceu.c [2023-11-23 22:37:20,224 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/data/06fae3e5f/ce2b135871334ca981a4d3269709bda4/FLAGf73995dca [2023-11-23 22:37:20,237 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/data/06fae3e5f/ce2b135871334ca981a4d3269709bda4 [2023-11-23 22:37:20,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:37:20,242 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:37:20,243 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:37:20,244 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:37:20,249 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:37:20,249 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:37:20" (1/1) ... [2023-11-23 22:37:20,250 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc8d4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20, skipping insertion in model container [2023-11-23 22:37:20,251 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:37:20" (1/1) ... [2023-11-23 22:37:20,271 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:37:20,453 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_c1996604-c1dc-4c5c-8e18-fd536d89fed0/sv-benchmarks/c/array-tiling/mlceu.c[396,409] [2023-11-23 22:37:20,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:37:20,494 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:37:20,512 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_c1996604-c1dc-4c5c-8e18-fd536d89fed0/sv-benchmarks/c/array-tiling/mlceu.c[396,409] [2023-11-23 22:37:20,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:37:20,551 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:37:20,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20 WrapperNode [2023-11-23 22:37:20,552 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:37:20,554 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:37:20,554 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:37:20,554 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:37:20,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20" (1/1) ... [2023-11-23 22:37:20,573 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20" (1/1) ... [2023-11-23 22:37:20,603 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2023-11-23 22:37:20,603 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:37:20,604 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:37:20,604 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:37:20,604 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:37:20,617 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20" (1/1) ... [2023-11-23 22:37:20,618 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20" (1/1) ... [2023-11-23 22:37:20,629 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20" (1/1) ... [2023-11-23 22:37:20,656 INFO L189 HeapSplitter]: Split 13 memory accesses to 3 slices as follows [2, 8, 3] [2023-11-23 22:37:20,656 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20" (1/1) ... [2023-11-23 22:37:20,657 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20" (1/1) ... [2023-11-23 22:37:20,662 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20" (1/1) ... [2023-11-23 22:37:20,671 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20" (1/1) ... [2023-11-23 22:37:20,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20" (1/1) ... [2023-11-23 22:37:20,682 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20" (1/1) ... [2023-11-23 22:37:20,689 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:37:20,693 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:37:20,693 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:37:20,694 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:37:20,695 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20" (1/1) ... [2023-11-23 22:37:20,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:37:20,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:20,731 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:37:20,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:37:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:37:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:37:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:37:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:37:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:37:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:37:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:37:20,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:37:20,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:37:20,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:37:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:37:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:37:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:37:20,870 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:37:20,872 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:37:21,087 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:37:21,135 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:37:21,139 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 22:37:21,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:37:21 BoogieIcfgContainer [2023-11-23 22:37:21,141 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:37:21,145 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:37:21,146 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:37:21,150 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:37:21,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:37:20" (1/3) ... [2023-11-23 22:37:21,151 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b590e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:37:21, skipping insertion in model container [2023-11-23 22:37:21,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:20" (2/3) ... [2023-11-23 22:37:21,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b590e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:37:21, skipping insertion in model container [2023-11-23 22:37:21,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:37:21" (3/3) ... [2023-11-23 22:37:21,155 INFO L112 eAbstractionObserver]: Analyzing ICFG mlceu.c [2023-11-23 22:37:21,177 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:37:21,177 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:37:21,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:37:21,255 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;@3518b12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:37:21,256 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:37:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 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 22:37:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 22:37:21,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:21,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:21,270 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:21,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:21,282 INFO L85 PathProgramCache]: Analyzing trace with hash -569365392, now seen corresponding path program 1 times [2023-11-23 22:37:21,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:21,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166090180] [2023-11-23 22:37:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:21,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:21,509 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 22:37:21,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:21,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166090180] [2023-11-23 22:37:21,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166090180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:21,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:21,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:37:21,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831652501] [2023-11-23 22:37:21,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:21,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:37:21,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:21,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:37:21,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:37:21,553 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 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 4.5) internal successors, (9), 2 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 22:37:21,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:21,579 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2023-11-23 22:37:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:37:21,582 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 22:37:21,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:21,591 INFO L225 Difference]: With dead ends: 29 [2023-11-23 22:37:21,591 INFO L226 Difference]: Without dead ends: 13 [2023-11-23 22:37:21,593 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 22:37:21,598 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:21,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:37:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-23 22:37:21,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-23 22:37:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 22:37:21,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-23 22:37:21,637 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2023-11-23 22:37:21,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:21,638 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-23 22:37:21,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 22:37:21,638 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-23 22:37:21,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 22:37:21,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:21,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:21,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:37:21,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:21,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:21,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1205641970, now seen corresponding path program 1 times [2023-11-23 22:37:21,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:21,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729156371] [2023-11-23 22:37:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:21,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:21,816 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 22:37:21,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:21,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729156371] [2023-11-23 22:37:21,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729156371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:21,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:21,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:37:21,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107150137] [2023-11-23 22:37:21,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:21,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:37:21,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:21,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:37:21,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:37:21,822 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.25) 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 22:37:21,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:21,868 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-11-23 22:37:21,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:37:21,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) 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 22:37:21,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:21,870 INFO L225 Difference]: With dead ends: 30 [2023-11-23 22:37:21,870 INFO L226 Difference]: Without dead ends: 21 [2023-11-23 22:37:21,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:37:21,873 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:21,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 11 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:37:21,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-23 22:37:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2023-11-23 22:37:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 22:37:21,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-23 22:37:21,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2023-11-23 22:37:21,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:21,889 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-23 22:37:21,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) 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 22:37:21,890 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-23 22:37:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 22:37:21,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:21,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:21,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:37:21,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:21,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:21,893 INFO L85 PathProgramCache]: Analyzing trace with hash 557936914, now seen corresponding path program 1 times [2023-11-23 22:37:21,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:21,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923854975] [2023-11-23 22:37:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:21,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:22,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:22,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923854975] [2023-11-23 22:37:22,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923854975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:22,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402569107] [2023-11-23 22:37:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:22,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:22,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:22,456 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:22,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:37:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:22,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 22:37:22,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:22,665 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 22:37:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:22,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:22,779 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 14 treesize of output 12 [2023-11-23 22:37:22,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-23 22:37:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:22,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402569107] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:22,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:22,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-23 22:37:22,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004285059] [2023-11-23 22:37:22,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:22,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:37:22,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:22,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:37:22,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:37:22,801 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 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 22:37:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:22,890 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2023-11-23 22:37:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:37:22,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 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 12 [2023-11-23 22:37:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:22,891 INFO L225 Difference]: With dead ends: 22 [2023-11-23 22:37:22,892 INFO L226 Difference]: Without dead ends: 20 [2023-11-23 22:37:22,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:37:22,894 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:22,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:37:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-23 22:37:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2023-11-23 22:37:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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 22:37:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-11-23 22:37:22,909 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-11-23 22:37:22,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:22,909 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-11-23 22:37:22,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 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 22:37:22,910 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-11-23 22:37:22,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 22:37:22,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:22,910 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:22,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:23,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:23,112 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:23,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:23,112 INFO L85 PathProgramCache]: Analyzing trace with hash -19725265, now seen corresponding path program 1 times [2023-11-23 22:37:23,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:23,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625400036] [2023-11-23 22:37:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:23,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:23,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:23,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625400036] [2023-11-23 22:37:23,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625400036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:23,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771263758] [2023-11-23 22:37:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:23,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:23,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:23,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:23,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:37:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:23,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:37:23,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:23,474 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 22:37:23,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:23,541 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 22:37:23,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771263758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:23,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:23,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-23 22:37:23,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151374233] [2023-11-23 22:37:23,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:23,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:37:23,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:23,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:37:23,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:37:23,549 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 22:37:23,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:23,654 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-11-23 22:37:23,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:37:23,655 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 22:37:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:23,659 INFO L225 Difference]: With dead ends: 43 [2023-11-23 22:37:23,659 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 22:37:23,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:37:23,663 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:23,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 30 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:37:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 22:37:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2023-11-23 22:37:23,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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 22:37:23,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-23 22:37:23,678 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2023-11-23 22:37:23,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:23,679 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-23 22:37:23,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 22:37:23,680 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-23 22:37:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 22:37:23,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:23,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:23,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:23,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:23,903 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:23,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:23,903 INFO L85 PathProgramCache]: Analyzing trace with hash 497859151, now seen corresponding path program 2 times [2023-11-23 22:37:23,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:23,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368225511] [2023-11-23 22:37:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:23,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:24,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:24,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368225511] [2023-11-23 22:37:24,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368225511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:24,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667209810] [2023-11-23 22:37:24,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:37:24,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:24,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:24,300 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:24,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:37:24,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:37:24,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:37:24,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:37:24,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:24,421 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 22:37:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:24,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:24,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 22:37:24,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-23 22:37:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:24,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667209810] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:24,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:24,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-23 22:37:24,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610836894] [2023-11-23 22:37:24,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:24,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:37:24,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:24,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:37:24,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:37:24,600 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:24,793 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2023-11-23 22:37:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:37:24,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-23 22:37:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:24,801 INFO L225 Difference]: With dead ends: 28 [2023-11-23 22:37:24,801 INFO L226 Difference]: Without dead ends: 26 [2023-11-23 22:37:24,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-23 22:37:24,803 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:24,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 56 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:37:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-23 22:37:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-11-23 22:37:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 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 22:37:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-23 22:37:24,809 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2023-11-23 22:37:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:24,809 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-23 22:37:24,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-23 22:37:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 22:37:24,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:24,812 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:24,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:25,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:25,018 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:25,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:25,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1204999634, now seen corresponding path program 3 times [2023-11-23 22:37:25,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:25,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553973630] [2023-11-23 22:37:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:25,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:25,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:25,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553973630] [2023-11-23 22:37:25,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553973630] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:25,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876057927] [2023-11-23 22:37:25,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:37:25,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:25,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:25,176 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:25,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:37:25,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 22:37:25,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:37:25,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 22:37:25,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:25,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:25,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876057927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:25,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:25,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-23 22:37:25,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841270466] [2023-11-23 22:37:25,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:25,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:37:25,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:25,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:37:25,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:37:25,436 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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 22:37:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:25,542 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-11-23 22:37:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:37:25,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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 22:37:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:25,547 INFO L225 Difference]: With dead ends: 55 [2023-11-23 22:37:25,548 INFO L226 Difference]: Without dead ends: 33 [2023-11-23 22:37:25,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-23 22:37:25,550 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:25,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 40 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:37:25,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-23 22:37:25,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2023-11-23 22:37:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 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 22:37:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-11-23 22:37:25,560 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2023-11-23 22:37:25,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:25,561 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-11-23 22:37:25,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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 22:37:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-11-23 22:37:25,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 22:37:25,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:25,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:25,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:25,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:25,778 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:25,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:25,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1792242674, now seen corresponding path program 4 times [2023-11-23 22:37:25,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:25,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879167554] [2023-11-23 22:37:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:25,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:26,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:26,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879167554] [2023-11-23 22:37:26,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879167554] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:26,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330117268] [2023-11-23 22:37:26,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:37:26,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:26,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:26,113 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:26,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:37:26,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:37:26,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:37:26,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 22:37:26,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:26,224 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 22:37:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:26,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:26,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 22:37:26,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-23 22:37:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:26,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330117268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:26,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:26,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2023-11-23 22:37:26,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480721337] [2023-11-23 22:37:26,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:26,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 22:37:26,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:26,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 22:37:26,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-23 22:37:26,512 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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 22:37:26,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:26,775 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2023-11-23 22:37:26,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 22:37:26,775 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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 24 [2023-11-23 22:37:26,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:26,776 INFO L225 Difference]: With dead ends: 34 [2023-11-23 22:37:26,776 INFO L226 Difference]: Without dead ends: 32 [2023-11-23 22:37:26,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-11-23 22:37:26,777 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:26,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 59 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:37:26,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-23 22:37:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-11-23 22:37:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:26,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-11-23 22:37:26,784 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2023-11-23 22:37:26,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:26,784 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-11-23 22:37:26,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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 22:37:26,784 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-11-23 22:37:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 22:37:26,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:26,785 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:26,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:26,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:26,986 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:26,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:26,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1968149839, now seen corresponding path program 5 times [2023-11-23 22:37:26,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:26,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909894016] [2023-11-23 22:37:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:26,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:27,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:27,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909894016] [2023-11-23 22:37:27,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909894016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:27,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137623248] [2023-11-23 22:37:27,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 22:37:27,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:27,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:27,156 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:27,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:37:27,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-23 22:37:27,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:37:27,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:37:27,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:27,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:27,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137623248] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:27,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:27,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-23 22:37:27,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651948044] [2023-11-23 22:37:27,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:27,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 22:37:27,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:27,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 22:37:27,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-23 22:37:27,470 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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 22:37:27,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:27,581 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2023-11-23 22:37:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:37:27,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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 27 [2023-11-23 22:37:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:27,584 INFO L225 Difference]: With dead ends: 67 [2023-11-23 22:37:27,585 INFO L226 Difference]: Without dead ends: 39 [2023-11-23 22:37:27,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-23 22:37:27,587 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:27,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 40 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:37:27,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-23 22:37:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2023-11-23 22:37:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 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 22:37:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-11-23 22:37:27,597 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2023-11-23 22:37:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:27,598 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-11-23 22:37:27,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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 22:37:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-11-23 22:37:27,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 22:37:27,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:27,599 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:27,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:27,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 22:37:27,812 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:27,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:27,812 INFO L85 PathProgramCache]: Analyzing trace with hash 229186415, now seen corresponding path program 6 times [2023-11-23 22:37:27,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:27,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587888081] [2023-11-23 22:37:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:27,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:28,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:28,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587888081] [2023-11-23 22:37:28,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587888081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:28,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102895736] [2023-11-23 22:37:28,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 22:37:28,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:28,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:28,360 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:28,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:37:28,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-23 22:37:28,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:37:28,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-23 22:37:28,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:28,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-23 22:37:29,319 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 22:37:29,319 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 23 [2023-11-23 22:37:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:29,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:29,875 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 18 treesize of output 16 [2023-11-23 22:37:29,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-11-23 22:37:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:30,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102895736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:30,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:30,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 14] total 37 [2023-11-23 22:37:30,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124509272] [2023-11-23 22:37:30,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:30,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-23 22:37:30,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-23 22:37:30,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 22:37:30,126 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 37 states have internal predecessors, (83), 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 22:37:33,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:33,163 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2023-11-23 22:37:33,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-23 22:37:33,163 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 37 states have internal predecessors, (83), 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 30 [2023-11-23 22:37:33,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:33,164 INFO L225 Difference]: With dead ends: 97 [2023-11-23 22:37:33,164 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 22:37:33,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1143, Invalid=5663, Unknown=0, NotChecked=0, Total=6806 [2023-11-23 22:37:33,168 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 195 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:33,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 72 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 22:37:33,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 22:37:33,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2023-11-23 22:37:33,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:33,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-11-23 22:37:33,186 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2023-11-23 22:37:33,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:33,186 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-11-23 22:37:33,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 37 states have internal predecessors, (83), 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 22:37:33,187 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-11-23 22:37:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 22:37:33,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:33,191 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:33,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:33,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:33,398 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:33,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:33,398 INFO L85 PathProgramCache]: Analyzing trace with hash 515402032, now seen corresponding path program 1 times [2023-11-23 22:37:33,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:33,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135450498] [2023-11-23 22:37:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:33,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 22:37:33,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:33,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135450498] [2023-11-23 22:37:33,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135450498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:33,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111670249] [2023-11-23 22:37:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:33,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:33,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:33,554 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:33,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:37:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:33,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:37:33,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 22:37:33,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 22:37:33,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111670249] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:33,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:33,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-23 22:37:33,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78975987] [2023-11-23 22:37:33,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:33,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:37:33,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:33,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:37:33,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:37:33,792 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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 22:37:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:33,939 INFO L93 Difference]: Finished difference Result 127 states and 144 transitions. [2023-11-23 22:37:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 22:37:33,940 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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 39 [2023-11-23 22:37:33,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:33,944 INFO L225 Difference]: With dead ends: 127 [2023-11-23 22:37:33,944 INFO L226 Difference]: Without dead ends: 107 [2023-11-23 22:37:33,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:37:33,945 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 111 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:33,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 44 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:37:33,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-23 22:37:33,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 59. [2023-11-23 22:37:33,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 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 22:37:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2023-11-23 22:37:33,966 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 39 [2023-11-23 22:37:33,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:33,967 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2023-11-23 22:37:33,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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 22:37:33,967 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2023-11-23 22:37:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 22:37:33,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:33,970 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:33,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:34,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:34,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:34,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:34,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1173541710, now seen corresponding path program 7 times [2023-11-23 22:37:34,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:34,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916439260] [2023-11-23 22:37:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:34,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:34,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:34,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916439260] [2023-11-23 22:37:34,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916439260] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:34,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228767342] [2023-11-23 22:37:34,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 22:37:34,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:34,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:34,746 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:34,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:37:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:34,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-23 22:37:34,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:34,969 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 22:37:35,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:37:35,034 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 21 treesize of output 20 [2023-11-23 22:37:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:35,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:35,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 22:37:35,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-23 22:37:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:37:35,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228767342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:35,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:35,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 31 [2023-11-23 22:37:35,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130122222] [2023-11-23 22:37:35,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:35,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 22:37:35,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:35,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 22:37:35,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2023-11-23 22:37:35,687 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 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 22:37:38,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:37:40,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:37:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:42,745 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2023-11-23 22:37:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-23 22:37:42,746 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 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 39 [2023-11-23 22:37:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:42,747 INFO L225 Difference]: With dead ends: 89 [2023-11-23 22:37:42,747 INFO L226 Difference]: Without dead ends: 87 [2023-11-23 22:37:42,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=2444, Unknown=0, NotChecked=0, Total=2756 [2023-11-23 22:37:42,749 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 43 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:42,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 152 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 643 Invalid, 7 Unknown, 0 Unchecked, 6.6s Time] [2023-11-23 22:37:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-23 22:37:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2023-11-23 22:37:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 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 22:37:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2023-11-23 22:37:42,763 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 39 [2023-11-23 22:37:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:42,764 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2023-11-23 22:37:42,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 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 22:37:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2023-11-23 22:37:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 22:37:42,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:42,765 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:42,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-23 22:37:42,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:42,980 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:42,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:42,980 INFO L85 PathProgramCache]: Analyzing trace with hash 57812111, now seen corresponding path program 8 times [2023-11-23 22:37:42,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:42,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293158807] [2023-11-23 22:37:42,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:42,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:43,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:43,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293158807] [2023-11-23 22:37:43,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293158807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:43,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969640787] [2023-11-23 22:37:43,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:37:43,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:43,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:43,601 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:43,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:37:43,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:37:43,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:37:43,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-23 22:37:43,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:43,910 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 22:37:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:44,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:44,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 22:37:44,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-23 22:37:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:44,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969640787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:44,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:44,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2023-11-23 22:37:44,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597936311] [2023-11-23 22:37:44,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:44,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-23 22:37:44,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:44,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-23 22:37:44,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2023-11-23 22:37:44,429 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 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 22:37:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:45,101 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2023-11-23 22:37:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-23 22:37:45,102 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 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 42 [2023-11-23 22:37:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:45,103 INFO L225 Difference]: With dead ends: 69 [2023-11-23 22:37:45,103 INFO L226 Difference]: Without dead ends: 67 [2023-11-23 22:37:45,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=1773, Unknown=0, NotChecked=0, Total=1980 [2023-11-23 22:37:45,105 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:45,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 162 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:37:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-23 22:37:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-11-23 22:37:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 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 22:37:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2023-11-23 22:37:45,119 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 42 [2023-11-23 22:37:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:45,120 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2023-11-23 22:37:45,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 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 22:37:45,120 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2023-11-23 22:37:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 22:37:45,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:45,121 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:45,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:45,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 22:37:45,327 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:45,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash 3818386, now seen corresponding path program 9 times [2023-11-23 22:37:45,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:45,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606455951] [2023-11-23 22:37:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:45,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:45,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:45,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606455951] [2023-11-23 22:37:45,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606455951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:45,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443803731] [2023-11-23 22:37:45,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:37:45,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:45,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:45,653 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:45,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:37:45,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-23 22:37:45,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:37:45,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 22:37:45,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:46,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:46,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443803731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:46,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:46,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-23 22:37:46,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751305552] [2023-11-23 22:37:46,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:46,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-23 22:37:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:46,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-23 22:37:46,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-23 22:37:46,271 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 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 22:37:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:46,491 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2023-11-23 22:37:46,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 22:37:46,492 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 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 45 [2023-11-23 22:37:46,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:46,493 INFO L225 Difference]: With dead ends: 96 [2023-11-23 22:37:46,494 INFO L226 Difference]: Without dead ends: 71 [2023-11-23 22:37:46,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 22:37:46,496 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:46,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 66 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:37:46,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-23 22:37:46,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2023-11-23 22:37:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 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 22:37:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2023-11-23 22:37:46,521 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 45 [2023-11-23 22:37:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:46,522 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2023-11-23 22:37:46,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 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 22:37:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2023-11-23 22:37:46,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 22:37:46,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:46,524 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:46,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:46,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:46,732 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:46,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:46,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2026537394, now seen corresponding path program 10 times [2023-11-23 22:37:46,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:46,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230374568] [2023-11-23 22:37:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:46,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:47,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:47,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230374568] [2023-11-23 22:37:47,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230374568] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:47,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894800741] [2023-11-23 22:37:47,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:37:47,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:47,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:47,270 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:47,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 22:37:47,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:37:47,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:37:47,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-23 22:37:47,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:47,394 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 13 treesize of output 9 [2023-11-23 22:37:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:47,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:47,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 22:37:47,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-23 22:37:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:47,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894800741] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:47,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:47,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 28 [2023-11-23 22:37:47,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392708538] [2023-11-23 22:37:47,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:47,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 22:37:47,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:47,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 22:37:47,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2023-11-23 22:37:47,877 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 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 22:37:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:48,554 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2023-11-23 22:37:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-23 22:37:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 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 48 [2023-11-23 22:37:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:48,555 INFO L225 Difference]: With dead ends: 72 [2023-11-23 22:37:48,555 INFO L226 Difference]: Without dead ends: 70 [2023-11-23 22:37:48,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2023-11-23 22:37:48,557 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:48,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:37:48,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-23 22:37:48,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2023-11-23 22:37:48,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 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 22:37:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2023-11-23 22:37:48,572 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 48 [2023-11-23 22:37:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:48,572 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2023-11-23 22:37:48,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 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 22:37:48,572 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2023-11-23 22:37:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 22:37:48,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:48,573 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:48,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-23 22:37:48,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 22:37:48,788 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:48,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1774669937, now seen corresponding path program 11 times [2023-11-23 22:37:48,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:48,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788510747] [2023-11-23 22:37:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:48,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 58 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:49,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:49,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788510747] [2023-11-23 22:37:49,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788510747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:49,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251040419] [2023-11-23 22:37:49,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 22:37:49,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:49,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:49,110 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:49,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 22:37:49,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-23 22:37:49,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:37:49,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 22:37:49,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:49,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:49,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251040419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:49,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:49,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-23 22:37:49,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900832681] [2023-11-23 22:37:49,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:49,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-23 22:37:49,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:49,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-23 22:37:49,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-23 22:37:49,717 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 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 22:37:49,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:49,919 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2023-11-23 22:37:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 22:37:49,919 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 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 51 [2023-11-23 22:37:49,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:49,920 INFO L225 Difference]: With dead ends: 102 [2023-11-23 22:37:49,921 INFO L226 Difference]: Without dead ends: 74 [2023-11-23 22:37:49,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 77 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 22:37:49,922 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:49,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 81 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:37:49,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-23 22:37:49,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2023-11-23 22:37:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 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 22:37:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2023-11-23 22:37:49,936 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 51 [2023-11-23 22:37:49,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:49,936 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2023-11-23 22:37:49,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 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 22:37:49,936 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2023-11-23 22:37:49,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 22:37:49,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:49,937 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:49,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:50,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 22:37:50,156 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:50,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:50,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1041640017, now seen corresponding path program 12 times [2023-11-23 22:37:50,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:50,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678729844] [2023-11-23 22:37:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:50,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:50,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:50,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678729844] [2023-11-23 22:37:50,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678729844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:50,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407678675] [2023-11-23 22:37:50,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 22:37:50,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:50,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:50,844 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:50,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 22:37:51,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-23 22:37:51,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:37:51,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 22:37:51,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:51,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-23 22:37:52,653 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 22:37:52,654 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 23 [2023-11-23 22:37:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 70 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:52,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:53,864 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 18 treesize of output 16 [2023-11-23 22:37:53,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-11-23 22:37:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 63 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:54,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407678675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:54,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:54,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 22] total 62 [2023-11-23 22:37:54,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537371000] [2023-11-23 22:37:54,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:54,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-23 22:37:54,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:54,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-23 22:37:54,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=3317, Unknown=0, NotChecked=0, Total=3782 [2023-11-23 22:37:54,485 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 62 states, 62 states have (on average 2.5) internal successors, (155), 62 states have internal predecessors, (155), 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 22:38:00,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:38:00,602 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2023-11-23 22:38:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-23 22:38:00,602 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.5) internal successors, (155), 62 states have internal predecessors, (155), 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 54 [2023-11-23 22:38:00,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:38:00,603 INFO L225 Difference]: With dead ends: 137 [2023-11-23 22:38:00,603 INFO L226 Difference]: Without dead ends: 78 [2023-11-23 22:38:00,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4952 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2499, Invalid=16961, Unknown=0, NotChecked=0, Total=19460 [2023-11-23 22:38:00,611 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 472 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:38:00,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 226 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 22:38:00,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-23 22:38:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2023-11-23 22:38:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 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 22:38:00,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2023-11-23 22:38:00,628 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 54 [2023-11-23 22:38:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:38:00,628 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2023-11-23 22:38:00,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.5) internal successors, (155), 62 states have internal predecessors, (155), 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 22:38:00,629 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2023-11-23 22:38:00,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 22:38:00,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:38:00,630 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:00,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 22:38:00,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 22:38:00,837 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:38:00,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:00,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1926449778, now seen corresponding path program 13 times [2023-11-23 22:38:00,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:00,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023843450] [2023-11-23 22:38:00,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:00,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 1 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:01,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:01,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023843450] [2023-11-23 22:38:01,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023843450] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:38:01,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659224190] [2023-11-23 22:38:01,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 22:38:01,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:01,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:01,643 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:38:01,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 22:38:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:01,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-23 22:38:01,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:02,053 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 22:38:02,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:38:02,137 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 21 treesize of output 20 [2023-11-23 22:38:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:03,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:38:03,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 22:38:03,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-23 22:38:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 1 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:38:03,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659224190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:38:03,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:38:03,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 23] total 47 [2023-11-23 22:38:03,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638234944] [2023-11-23 22:38:03,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:38:03,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-23 22:38:03,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:03,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-23 22:38:03,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1983, Unknown=0, NotChecked=0, Total=2162 [2023-11-23 22:38:03,249 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 47 states, 47 states have (on average 2.74468085106383) internal successors, (129), 47 states have internal predecessors, (129), 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 22:38:06,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:38:08,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:38:09,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:38:09,512 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2023-11-23 22:38:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-23 22:38:09,513 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.74468085106383) internal successors, (129), 47 states have internal predecessors, (129), 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 63 [2023-11-23 22:38:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:38:09,514 INFO L225 Difference]: With dead ends: 113 [2023-11-23 22:38:09,514 INFO L226 Difference]: Without dead ends: 111 [2023-11-23 22:38:09,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=508, Invalid=6632, Unknown=0, NotChecked=0, Total=7140 [2023-11-23 22:38:09,525 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 1712 mSolverCounterSat, 62 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1712 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:38:09,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 378 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1712 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2023-11-23 22:38:09,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-23 22:38:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 74. [2023-11-23 22:38:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 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 22:38:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2023-11-23 22:38:09,546 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 63 [2023-11-23 22:38:09,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:38:09,546 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2023-11-23 22:38:09,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.74468085106383) internal successors, (129), 47 states have internal predecessors, (129), 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 22:38:09,547 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2023-11-23 22:38:09,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 22:38:09,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:38:09,548 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:09,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 22:38:09,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 22:38:09,764 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:38:09,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:09,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1517432527, now seen corresponding path program 14 times [2023-11-23 22:38:09,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:09,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420020807] [2023-11-23 22:38:09,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:09,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:10,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:10,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420020807] [2023-11-23 22:38:10,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420020807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:38:10,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257165314] [2023-11-23 22:38:10,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:38:10,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:10,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:10,533 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:38:10,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1996604-c1dc-4c5c-8e18-fd536d89fed0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 22:38:10,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:38:10,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:38:10,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-23 22:38:10,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:11,019 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