./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/list-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/list-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a135e953d64ed0fec81eb2a1e42f4031e3e387fc71d5a5cd2177772a202dc706 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:16:50,037 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:16:50,108 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:16:50,115 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:16:50,115 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:16:50,147 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:16:50,147 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:16:50,148 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:16:50,149 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:16:50,149 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:16:50,150 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:16:50,150 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:16:50,151 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:16:50,151 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:16:50,151 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:16:50,152 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:16:50,155 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:16:50,157 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:16:50,158 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:16:50,158 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:16:50,158 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:16:50,159 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:16:50,159 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:16:50,159 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:16:50,159 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:16:50,160 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:16:50,160 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:16:50,160 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:16:50,160 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:16:50,161 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:16:50,163 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:16:50,163 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:16:50,164 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:16:50,164 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:16:50,164 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:16:50,164 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:16:50,165 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:16:50,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:16:50,165 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:16:50,165 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:16:50,166 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:16:50,167 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:16:50,167 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_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a135e953d64ed0fec81eb2a1e42f4031e3e387fc71d5a5cd2177772a202dc706 [2024-10-31 22:16:50,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:16:50,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:16:50,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:16:50,529 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:16:50,529 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:16:50,530 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/list-properties/list-2.i Unable to find full path for "g++" [2024-10-31 22:16:52,646 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:16:52,921 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:16:52,922 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/sv-benchmarks/c/list-properties/list-2.i [2024-10-31 22:16:52,937 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/data/4054503ab/88776988703a49ec9ddfecb9851fd54a/FLAG430cec6a1 [2024-10-31 22:16:52,954 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/data/4054503ab/88776988703a49ec9ddfecb9851fd54a [2024-10-31 22:16:52,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:16:52,959 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:16:52,960 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:16:52,960 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:16:52,970 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:16:52,971 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:16:52" (1/1) ... [2024-10-31 22:16:52,974 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f72beee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:52, skipping insertion in model container [2024-10-31 22:16:52,975 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:16:52" (1/1) ... [2024-10-31 22:16:53,028 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:16:53,403 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/sv-benchmarks/c/list-properties/list-2.i[23408,23421] [2024-10-31 22:16:53,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:16:53,417 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:16:53,475 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/sv-benchmarks/c/list-properties/list-2.i[23408,23421] [2024-10-31 22:16:53,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:16:53,515 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:16:53,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:53 WrapperNode [2024-10-31 22:16:53,516 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:16:53,517 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:16:53,518 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:16:53,518 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:16:53,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:53" (1/1) ... [2024-10-31 22:16:53,547 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:53" (1/1) ... [2024-10-31 22:16:53,579 INFO L138 Inliner]: procedures = 124, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2024-10-31 22:16:53,581 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:16:53,582 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:16:53,582 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:16:53,582 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:16:53,595 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:53" (1/1) ... [2024-10-31 22:16:53,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:53" (1/1) ... [2024-10-31 22:16:53,598 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:53" (1/1) ... [2024-10-31 22:16:53,622 INFO L175 MemorySlicer]: Split 14 memory accesses to 2 slices as follows [2, 12]. 86 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-10-31 22:16:53,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:53" (1/1) ... [2024-10-31 22:16:53,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:53" (1/1) ... [2024-10-31 22:16:53,635 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:53" (1/1) ... [2024-10-31 22:16:53,641 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:53" (1/1) ... [2024-10-31 22:16:53,643 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:53" (1/1) ... [2024-10-31 22:16:53,648 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:53" (1/1) ... [2024-10-31 22:16:53,654 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:16:53,655 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:16:53,655 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:16:53,655 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:16:53,656 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:53" (1/1) ... [2024-10-31 22:16:53,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:16:53,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:53,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:16:53,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:16:53,730 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-10-31 22:16:53,731 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-10-31 22:16:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:16:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:16:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:16:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:16:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:16:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:16:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-31 22:16:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-31 22:16:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-31 22:16:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-31 22:16:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:16:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:16:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:16:53,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:16:53,867 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:16:53,869 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:16:53,901 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-10-31 22:16:54,083 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-10-31 22:16:54,083 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:16:54,115 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:16:54,116 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:16:54,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:16:54 BoogieIcfgContainer [2024-10-31 22:16:54,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:16:54,119 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:16:54,119 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:16:54,123 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:16:54,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:16:52" (1/3) ... [2024-10-31 22:16:54,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a7bb440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:16:54, skipping insertion in model container [2024-10-31 22:16:54,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:53" (2/3) ... [2024-10-31 22:16:54,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a7bb440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:16:54, skipping insertion in model container [2024-10-31 22:16:54,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:16:54" (3/3) ... [2024-10-31 22:16:54,126 INFO L112 eAbstractionObserver]: Analyzing ICFG list-2.i [2024-10-31 22:16:54,167 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:16:54,167 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:16:54,226 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:16:54,234 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@10b17dd4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:16:54,234 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:16:54,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 25 states have (on average 1.52) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 22:16:54,248 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:54,249 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:54,249 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:54,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash 896526153, now seen corresponding path program 1 times [2024-10-31 22:16:54,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:54,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405265768] [2024-10-31 22:16:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:54,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:54,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:54,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405265768] [2024-10-31 22:16:54,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405265768] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:54,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:54,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:16:54,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095144525] [2024-10-31 22:16:54,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:54,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:16:54,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:54,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:16:54,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:16:54,475 INFO L87 Difference]: Start difference. First operand has 30 states, 25 states have (on average 1.52) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:54,491 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2024-10-31 22:16:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:16:54,492 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 [2024-10-31 22:16:54,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:54,499 INFO L225 Difference]: With dead ends: 50 [2024-10-31 22:16:54,499 INFO L226 Difference]: Without dead ends: 21 [2024-10-31 22:16:54,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:16:54,505 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:54,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:16:54,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-31 22:16:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-31 22:16:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-10-31 22:16:54,546 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2024-10-31 22:16:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:54,547 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-10-31 22:16:54,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:54,548 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-10-31 22:16:54,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 22:16:54,550 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:54,550 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:54,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:16:54,551 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:54,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:54,554 INFO L85 PathProgramCache]: Analyzing trace with hash 283143297, now seen corresponding path program 1 times [2024-10-31 22:16:54,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:54,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240346201] [2024-10-31 22:16:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:54,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:55,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:55,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240346201] [2024-10-31 22:16:55,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240346201] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:55,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:55,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:16:55,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388026169] [2024-10-31 22:16:55,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:55,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:16:55,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:55,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:16:55,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:16:55,023 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:55,130 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2024-10-31 22:16:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:16:55,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2024-10-31 22:16:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:55,132 INFO L225 Difference]: With dead ends: 38 [2024-10-31 22:16:55,132 INFO L226 Difference]: Without dead ends: 34 [2024-10-31 22:16:55,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:16:55,134 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:55,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:16:55,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-31 22:16:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-10-31 22:16:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-10-31 22:16:55,148 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 16 [2024-10-31 22:16:55,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:55,150 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-10-31 22:16:55,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:55,151 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-10-31 22:16:55,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-31 22:16:55,152 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:55,152 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:55,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:16:55,153 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:55,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:55,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1566445212, now seen corresponding path program 1 times [2024-10-31 22:16:55,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:55,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668402971] [2024-10-31 22:16:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:55,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:55,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:55,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668402971] [2024-10-31 22:16:55,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668402971] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:55,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:55,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:16:55,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838539951] [2024-10-31 22:16:55,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:55,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:16:55,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:55,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:16:55,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:16:55,370 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:55,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:55,474 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2024-10-31 22:16:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:16:55,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-31 22:16:55,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:55,476 INFO L225 Difference]: With dead ends: 40 [2024-10-31 22:16:55,476 INFO L226 Difference]: Without dead ends: 32 [2024-10-31 22:16:55,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:16:55,478 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:55,479 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 52 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:16:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-31 22:16:55,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2024-10-31 22:16:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-10-31 22:16:55,491 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2024-10-31 22:16:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:55,492 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-10-31 22:16:55,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-10-31 22:16:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-31 22:16:55,493 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:55,493 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:55,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:16:55,493 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:55,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:55,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1703819108, now seen corresponding path program 1 times [2024-10-31 22:16:55,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:55,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127172243] [2024-10-31 22:16:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:55,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:55,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:55,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127172243] [2024-10-31 22:16:55,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127172243] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:55,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:55,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:16:55,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554552349] [2024-10-31 22:16:55,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:55,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:16:55,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:55,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:16:55,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:16:55,636 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:55,701 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2024-10-31 22:16:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:16:55,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-31 22:16:55,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:55,703 INFO L225 Difference]: With dead ends: 40 [2024-10-31 22:16:55,703 INFO L226 Difference]: Without dead ends: 29 [2024-10-31 22:16:55,703 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:16:55,704 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:55,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 56 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:16:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-31 22:16:55,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2024-10-31 22:16:55,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:55,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-31 22:16:55,709 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2024-10-31 22:16:55,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:55,710 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-31 22:16:55,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:55,710 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-31 22:16:55,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-31 22:16:55,711 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:55,711 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:55,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:16:55,711 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:55,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:55,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1538293272, now seen corresponding path program 1 times [2024-10-31 22:16:55,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:55,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014231045] [2024-10-31 22:16:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:55,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:56,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:56,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014231045] [2024-10-31 22:16:56,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014231045] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:56,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550720419] [2024-10-31 22:16:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:56,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:56,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:56,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:56,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:16:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:56,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-31 22:16:56,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:56,446 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 [2024-10-31 22:16:56,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-31 22:16:56,624 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-10-31 22:16:56,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2024-10-31 22:16:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:56,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:57,199 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_23| Int) (v_ArrVal_81 (Array Int Int))) (let ((.cse1 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_81))) (or (not (= v_ArrVal_81 (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 (select v_ArrVal_81 .cse0))))) (= (select (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2) (= 3 (select (select (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_23| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_23|) |c_ULTIMATE.start_main_~t~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2024-10-31 22:16:57,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:16:57,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 181 [2024-10-31 22:16:57,538 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 11 treesize of output 7 [2024-10-31 22:16:57,545 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 203 treesize of output 195 [2024-10-31 22:16:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:57,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550720419] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:57,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:57,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 22 [2024-10-31 22:16:57,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311542056] [2024-10-31 22:16:57,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:57,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 22:16:57,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:57,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 22:16:57,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=352, Unknown=1, NotChecked=38, Total=462 [2024-10-31 22:16:57,618 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:58,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:58,273 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-10-31 22:16:58,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 22:16:58,274 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 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 20 [2024-10-31 22:16:58,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:58,276 INFO L225 Difference]: With dead ends: 53 [2024-10-31 22:16:58,277 INFO L226 Difference]: Without dead ends: 45 [2024-10-31 22:16:58,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=169, Invalid=826, Unknown=1, NotChecked=60, Total=1056 [2024-10-31 22:16:58,278 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:58,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 190 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 258 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2024-10-31 22:16:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-31 22:16:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2024-10-31 22:16:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2024-10-31 22:16:58,293 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 20 [2024-10-31 22:16:58,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:58,293 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2024-10-31 22:16:58,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2024-10-31 22:16:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-31 22:16:58,294 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:58,294 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:58,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:16:58,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:58,497 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:58,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:58,498 INFO L85 PathProgramCache]: Analyzing trace with hash -674891608, now seen corresponding path program 1 times [2024-10-31 22:16:58,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:58,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039100016] [2024-10-31 22:16:58,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:58,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:58,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:58,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039100016] [2024-10-31 22:16:58,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039100016] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:58,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102014640] [2024-10-31 22:16:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:58,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:58,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:58,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:58,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:16:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:58,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-31 22:16:58,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:58,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:16:59,002 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 [2024-10-31 22:16:59,017 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:16:59,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:16:59,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-31 22:16:59,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:16:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:59,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:59,146 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_133 (Array Int Int))) (= (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2024-10-31 22:16:59,177 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_130 (Array Int Int)) (v_ArrVal_133 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_130) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (not (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 (select v_ArrVal_130 .cse0))) v_ArrVal_130)))) is different from false [2024-10-31 22:16:59,205 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:16:59,206 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 132 treesize of output 134 [2024-10-31 22:16:59,224 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 24 treesize of output 20 [2024-10-31 22:16:59,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-31 22:16:59,270 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 48 treesize of output 46 [2024-10-31 22:16:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-10-31 22:16:59,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102014640] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:59,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:59,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-10-31 22:16:59,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438431111] [2024-10-31 22:16:59,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:59,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:16:59,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:59,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:16:59,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=85, Unknown=2, NotChecked=38, Total=156 [2024-10-31 22:16:59,370 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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) [2024-10-31 22:16:59,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:59,554 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2024-10-31 22:16:59,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:16:59,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-31 22:16:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:59,556 INFO L225 Difference]: With dead ends: 60 [2024-10-31 22:16:59,556 INFO L226 Difference]: Without dead ends: 56 [2024-10-31 22:16:59,556 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=158, Unknown=2, NotChecked=54, Total=272 [2024-10-31 22:16:59,557 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:59,557 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 90 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 91 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2024-10-31 22:16:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-31 22:16:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2024-10-31 22:16:59,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-10-31 22:16:59,564 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 20 [2024-10-31 22:16:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:59,565 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-10-31 22:16:59,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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) [2024-10-31 22:16:59,565 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-10-31 22:16:59,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-31 22:16:59,566 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:59,566 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:59,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:16:59,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:16:59,770 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:59,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:59,771 INFO L85 PathProgramCache]: Analyzing trace with hash 242294851, now seen corresponding path program 1 times [2024-10-31 22:16:59,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:59,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743523450] [2024-10-31 22:16:59,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:59,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:00,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:00,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743523450] [2024-10-31 22:17:00,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743523450] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:00,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012382796] [2024-10-31 22:17:00,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:00,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:00,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:00,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:00,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:17:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:00,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-31 22:17:00,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:00,527 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 [2024-10-31 22:17:00,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:17:00,649 INFO L349 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2024-10-31 22:17:00,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2024-10-31 22:17:00,671 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2024-10-31 22:17:00,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-10-31 22:17:00,677 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 9 [2024-10-31 22:17:00,700 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 15 treesize of output 11 [2024-10-31 22:17:00,791 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 19 treesize of output 11 [2024-10-31 22:17:00,798 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 7 treesize of output 3 [2024-10-31 22:17:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:00,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:00,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:00,987 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 94 treesize of output 97 [2024-10-31 22:17:01,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:01,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2024-10-31 22:17:01,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:01,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2024-10-31 22:17:01,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:01,114 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 83 treesize of output 52 [2024-10-31 22:17:01,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:01,132 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 58 treesize of output 57 [2024-10-31 22:17:01,140 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 41 treesize of output 37 [2024-10-31 22:17:01,147 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 37 treesize of output 33 [2024-10-31 22:17:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:01,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012382796] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:01,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:01,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 20 [2024-10-31 22:17:01,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302215417] [2024-10-31 22:17:01,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:01,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:17:01,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:01,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:17:01,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:17:01,264 INFO L87 Difference]: Start difference. First operand 45 states and 53 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) [2024-10-31 22:17:01,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:17:01,833 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2024-10-31 22:17:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 22:17:01,834 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 22 [2024-10-31 22:17:01,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:17:01,834 INFO L225 Difference]: With dead ends: 73 [2024-10-31 22:17:01,835 INFO L226 Difference]: Without dead ends: 62 [2024-10-31 22:17:01,835 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-10-31 22:17:01,836 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:17:01,836 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 135 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:17:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-31 22:17:01,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2024-10-31 22:17:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:17:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-10-31 22:17:01,852 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 22 [2024-10-31 22:17:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:17:01,853 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-10-31 22:17:01,853 INFO L472 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) [2024-10-31 22:17:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-10-31 22:17:01,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-31 22:17:01,854 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:17:01,854 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:01,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:17:02,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:02,059 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:17:02,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:02,060 INFO L85 PathProgramCache]: Analyzing trace with hash 965794270, now seen corresponding path program 1 times [2024-10-31 22:17:02,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:02,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349816224] [2024-10-31 22:17:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:02,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:02,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:02,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349816224] [2024-10-31 22:17:02,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349816224] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:02,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180442752] [2024-10-31 22:17:02,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:02,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:02,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:02,539 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:02,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:17:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:02,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-31 22:17:02,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:02,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:17:02,799 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 [2024-10-31 22:17:02,874 INFO L349 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2024-10-31 22:17:02,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2024-10-31 22:17:02,899 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2024-10-31 22:17:02,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-10-31 22:17:02,904 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 9 [2024-10-31 22:17:02,926 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 15 treesize of output 11 [2024-10-31 22:17:03,030 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 19 treesize of output 11 [2024-10-31 22:17:03,038 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 7 treesize of output 3 [2024-10-31 22:17:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:03,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:03,239 INFO L349 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2024-10-31 22:17:03,239 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 67 treesize of output 66 [2024-10-31 22:17:03,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:03,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 152 [2024-10-31 22:17:03,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:03,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 112 [2024-10-31 22:17:03,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:03,591 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 263 treesize of output 148 [2024-10-31 22:17:03,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:03,615 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 192 treesize of output 173 [2024-10-31 22:17:03,627 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 157 treesize of output 153 [2024-10-31 22:17:03,636 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 153 treesize of output 149 [2024-10-31 22:17:03,648 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 149 treesize of output 141 [2024-10-31 22:17:03,657 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 141 treesize of output 137 [2024-10-31 22:17:03,665 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 137 treesize of output 133 [2024-10-31 22:17:03,673 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 133 treesize of output 125 [2024-10-31 22:17:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:03,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180442752] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:03,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:03,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2024-10-31 22:17:03,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126606259] [2024-10-31 22:17:03,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:03,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 22:17:03,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:03,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 22:17:03,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-10-31 22:17:03,889 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:17:04,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:17:04,497 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2024-10-31 22:17:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-31 22:17:04,498 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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 [2024-10-31 22:17:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:17:04,498 INFO L225 Difference]: With dead ends: 68 [2024-10-31 22:17:04,499 INFO L226 Difference]: Without dead ends: 48 [2024-10-31 22:17:04,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2024-10-31 22:17:04,500 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 63 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:17:04,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 161 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:17:04,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-31 22:17:04,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2024-10-31 22:17:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 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) [2024-10-31 22:17:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2024-10-31 22:17:04,507 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 24 [2024-10-31 22:17:04,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:17:04,510 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2024-10-31 22:17:04,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:17:04,510 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2024-10-31 22:17:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-31 22:17:04,511 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:17:04,511 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:04,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-31 22:17:04,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:04,712 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:17:04,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:04,712 INFO L85 PathProgramCache]: Analyzing trace with hash 666149519, now seen corresponding path program 1 times [2024-10-31 22:17:04,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:04,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629175298] [2024-10-31 22:17:04,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:04,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:05,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:05,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629175298] [2024-10-31 22:17:05,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629175298] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:05,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535284333] [2024-10-31 22:17:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:05,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:05,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:05,195 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:05,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:17:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:05,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-31 22:17:05,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:05,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:17:05,357 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:17:05,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:17:05,363 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 [2024-10-31 22:17:05,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:17:05,403 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 8 [2024-10-31 22:17:05,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-31 22:17:05,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:17:05,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:17:05,539 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-10-31 22:17:05,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2024-10-31 22:17:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:05,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:05,850 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_317 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_54| Int)) (let ((.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_317))) (or (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (= 3 (select (select (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_54| (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_54|) |c_ULTIMATE.start_main_~t~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2024-10-31 22:17:05,876 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_317 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_54| Int)) (let ((.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_317))) (or (= 3 (select (select (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_54| (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_54|) 0 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) is different from false [2024-10-31 22:17:05,924 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_317 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_54| Int) (v_ArrVal_311 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int#1| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_311) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_317))) (or (= (select (select (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_54| (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_54|) 0 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (not (= (let ((.cse1 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~p~0#1.base|) .cse1 (select v_ArrVal_311 .cse1))) v_ArrVal_311))))) is different from false [2024-10-31 22:17:05,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:05,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1699 treesize of output 1663 [2024-10-31 22:17:06,085 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 687 treesize of output 651 [2024-10-31 22:17:09,046 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 41 treesize of output 35 [2024-10-31 22:17:09,107 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 19 treesize of output 15 [2024-10-31 22:17:09,126 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 11 treesize of output 7 [2024-10-31 22:17:09,160 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 593 treesize of output 567 [2024-10-31 22:17:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-10-31 22:17:09,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535284333] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:09,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:09,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2024-10-31 22:17:09,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20174499] [2024-10-31 22:17:09,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:09,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:17:09,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:17:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=316, Unknown=3, NotChecked=114, Total=506 [2024-10-31 22:17:09,317 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2024-10-31 22:17:09,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:17:09,924 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2024-10-31 22:17:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-31 22:17:09,924 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 24 [2024-10-31 22:17:09,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:17:09,925 INFO L225 Difference]: With dead ends: 77 [2024-10-31 22:17:09,925 INFO L226 Difference]: Without dead ends: 72 [2024-10-31 22:17:09,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=759, Unknown=3, NotChecked=180, Total=1122 [2024-10-31 22:17:09,927 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:17:09,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 197 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 252 Invalid, 0 Unknown, 205 Unchecked, 0.3s Time] [2024-10-31 22:17:09,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-31 22:17:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2024-10-31 22:17:09,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:17:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2024-10-31 22:17:09,934 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 24 [2024-10-31 22:17:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:17:09,935 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2024-10-31 22:17:09,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2024-10-31 22:17:09,935 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2024-10-31 22:17:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-31 22:17:09,936 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:17:09,936 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:09,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:17:10,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:10,141 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:17:10,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:10,141 INFO L85 PathProgramCache]: Analyzing trace with hash 17470058, now seen corresponding path program 1 times [2024-10-31 22:17:10,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:10,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21894488] [2024-10-31 22:17:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:10,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:10,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:10,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21894488] [2024-10-31 22:17:10,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21894488] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:10,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940120676] [2024-10-31 22:17:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:10,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:10,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:10,649 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:10,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:17:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:10,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-31 22:17:10,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:10,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:17:10,828 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 [2024-10-31 22:17:10,843 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:17:10,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:17:10,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-31 22:17:10,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:17:10,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:17:10,995 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-10-31 22:17:10,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2024-10-31 22:17:11,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:11,074 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 31 treesize of output 23 [2024-10-31 22:17:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:11,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:11,195 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_63| Int) (v_ArrVal_398 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_398))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_63| (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_63|) |c_ULTIMATE.start_main_~t~0#1.offset| 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) is different from false [2024-10-31 22:17:11,209 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_63| Int) (v_ArrVal_398 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_398))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_63| (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_63|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) is different from false [2024-10-31 22:17:11,229 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_63| Int) (v_ArrVal_396 (Array Int Int)) (v_ArrVal_398 (Array Int Int))) (or (not (= (select (select (let ((.cse0 (store (store |c_#memory_int#1| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_396) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_398))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_63| (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_63|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) (not (= v_ArrVal_396 (let ((.cse1 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~p~0#1.base|) .cse1 (select v_ArrVal_396 .cse1))))))) is different from false [2024-10-31 22:17:11,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:11,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1729 treesize of output 1711 [2024-10-31 22:17:11,320 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 550 treesize of output 518 [2024-10-31 22:17:11,870 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 6 treesize of output 4 [2024-10-31 22:17:11,874 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 6 treesize of output 4 [2024-10-31 22:17:11,883 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 44 treesize of output 42 [2024-10-31 22:17:11,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-10-31 22:17:12,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940120676] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:12,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:12,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2024-10-31 22:17:12,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580646187] [2024-10-31 22:17:12,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:12,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 22:17:12,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:12,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 22:17:12,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=354, Unknown=3, NotChecked=120, Total=552 [2024-10-31 22:17:12,021 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:17:12,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:17:12,535 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2024-10-31 22:17:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-31 22:17:12,536 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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 26 [2024-10-31 22:17:12,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:17:12,536 INFO L225 Difference]: With dead ends: 79 [2024-10-31 22:17:12,537 INFO L226 Difference]: Without dead ends: 71 [2024-10-31 22:17:12,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=878, Unknown=3, NotChecked=192, Total=1260 [2024-10-31 22:17:12,538 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:17:12,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 129 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 199 Invalid, 0 Unknown, 156 Unchecked, 0.2s Time] [2024-10-31 22:17:12,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-31 22:17:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2024-10-31 22:17:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 67 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:17:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2024-10-31 22:17:12,546 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 26 [2024-10-31 22:17:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:17:12,547 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2024-10-31 22:17:12,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:17:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2024-10-31 22:17:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-31 22:17:12,548 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:17:12,550 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:12,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:17:12,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:12,754 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:17:12,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:12,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1042173034, now seen corresponding path program 2 times [2024-10-31 22:17:12,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:12,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933128670] [2024-10-31 22:17:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:12,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:13,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:13,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933128670] [2024-10-31 22:17:13,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933128670] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:13,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172692165] [2024-10-31 22:17:13,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:17:13,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:13,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:13,474 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:13,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4838547-a830-4851-abca-bde3f2ab9771/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:17:13,594 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:17:13,594 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:17:13,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-31 22:17:13,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:13,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:17:13,663 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-31 22:17:13,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-10-31 22:17:13,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:17:13,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:17:13,810 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-10-31 22:17:13,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2024-10-31 22:17:13,833 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-10-31 22:17:13,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-10-31 22:17:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:13,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:17:13,864 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 [2024-10-31 22:17:13,967 INFO L349 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2024-10-31 22:17:13,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 201 treesize of output 147 [2024-10-31 22:17:13,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 124 [2024-10-31 22:17:13,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2024-10-31 22:17:14,139 INFO L349 Elim1Store]: treesize reduction 56, result has 16.4 percent of original size [2024-10-31 22:17:14,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 192 treesize of output 153 [2024-10-31 22:17:14,168 INFO L349 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2024-10-31 22:17:14,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 148 treesize of output 142 [2024-10-31 22:17:14,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 40 [2024-10-31 22:17:14,342 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-10-31 22:17:14,343 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 50 [2024-10-31 22:17:14,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2024-10-31 22:17:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:14,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:14,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:14,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2024-10-31 22:17:14,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:14,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 946 treesize of output 972 [2024-10-31 22:17:14,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:17:14,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 522 treesize of output 490 [2024-10-31 22:17:15,119 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 6 treesize of output 4 [2024-10-31 22:17:15,134 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 6 treesize of output 4