./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pnr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:03:28,944 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:03:29,036 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:03:29,041 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:03:29,042 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:03:29,068 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:03:29,069 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:03:29,069 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:03:29,070 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:03:29,071 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:03:29,072 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:03:29,072 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:03:29,073 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:03:29,073 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:03:29,074 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:03:29,075 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:03:29,075 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:03:29,076 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:03:29,076 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:03:29,077 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:03:29,078 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:03:29,079 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:03:29,080 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:03:29,080 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:03:29,081 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:03:29,081 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:03:29,082 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:03:29,083 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:03:29,083 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:03:29,084 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:03:29,084 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:03:29,085 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:03:29,085 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:03:29,085 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:03:29,086 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:03:29,086 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:03:29,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:03:29,087 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:03:29,087 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:03:29,087 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:03:29,088 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:03:29,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:03:29,088 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:03:29,089 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:03:29,089 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:03:29,089 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b [2023-11-19 05:03:29,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:03:29,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:03:29,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:03:29,427 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:03:29,428 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:03:29,430 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/array-tiling/pnr5.c [2023-11-19 05:03:32,662 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:03:32,897 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:03:32,898 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/sv-benchmarks/c/array-tiling/pnr5.c [2023-11-19 05:03:32,906 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/data/a254a022e/f428af4631314b4db4d37cf6365474f9/FLAG2f5f59ea4 [2023-11-19 05:03:32,922 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/data/a254a022e/f428af4631314b4db4d37cf6365474f9 [2023-11-19 05:03:32,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:03:32,926 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:03:32,928 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:03:32,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:03:32,935 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:03:32,936 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:03:32" (1/1) ... [2023-11-19 05:03:32,938 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e1cf7c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:32, skipping insertion in model container [2023-11-19 05:03:32,938 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:03:32" (1/1) ... [2023-11-19 05:03:32,964 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:03:33,144 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2023-11-19 05:03:33,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:03:33,201 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:03:33,219 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2023-11-19 05:03:33,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:03:33,280 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:03:33,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:33 WrapperNode [2023-11-19 05:03:33,281 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:03:33,282 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:03:33,282 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:03:33,283 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:03:33,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:33" (1/1) ... [2023-11-19 05:03:33,313 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:33" (1/1) ... [2023-11-19 05:03:33,349 INFO L138 Inliner]: procedures = 17, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 99 [2023-11-19 05:03:33,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:03:33,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:03:33,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:03:33,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:03:33,360 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:33" (1/1) ... [2023-11-19 05:03:33,361 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:33" (1/1) ... [2023-11-19 05:03:33,367 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:33" (1/1) ... [2023-11-19 05:03:33,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:33" (1/1) ... [2023-11-19 05:03:33,386 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:33" (1/1) ... [2023-11-19 05:03:33,393 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:33" (1/1) ... [2023-11-19 05:03:33,401 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:33" (1/1) ... [2023-11-19 05:03:33,403 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:33" (1/1) ... [2023-11-19 05:03:33,405 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:03:33,409 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:03:33,412 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:03:33,413 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:03:33,413 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:33" (1/1) ... [2023-11-19 05:03:33,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:03:33,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:03:33,450 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:03:33,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:03:33,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:03:33,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:03:33,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:03:33,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:03:33,498 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2023-11-19 05:03:33,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2023-11-19 05:03:33,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:03:33,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:03:33,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:03:33,573 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:03:33,575 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:03:33,796 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:03:33,918 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:03:33,919 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 05:03:33,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:03:33 BoogieIcfgContainer [2023-11-19 05:03:33,924 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:03:33,926 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:03:33,927 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:03:33,930 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:03:33,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:03:32" (1/3) ... [2023-11-19 05:03:33,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c60e7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:03:33, skipping insertion in model container [2023-11-19 05:03:33,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:33" (2/3) ... [2023-11-19 05:03:33,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c60e7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:03:33, skipping insertion in model container [2023-11-19 05:03:33,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:03:33" (3/3) ... [2023-11-19 05:03:33,934 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr5.c [2023-11-19 05:03:33,950 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:03:33,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:03:34,015 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:03:34,021 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, 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;@51391338, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:03:34,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:03:34,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 05:03:34,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 05:03:34,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:34,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:03:34,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:34,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:34,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1043633906, now seen corresponding path program 1 times [2023-11-19 05:03:34,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:34,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8298736] [2023-11-19 05:03:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:34,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:03:34,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:34,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8298736] [2023-11-19 05:03:34,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8298736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:03:34,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:03:34,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:03:34,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39091844] [2023-11-19 05:03:34,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:03:34,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:03:34,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:34,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:03:34,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:03:34,755 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:03:34,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:34,945 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2023-11-19 05:03:34,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:03:34,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-19 05:03:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:34,958 INFO L225 Difference]: With dead ends: 46 [2023-11-19 05:03:34,958 INFO L226 Difference]: Without dead ends: 32 [2023-11-19 05:03:34,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:03:34,968 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:34,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:03:34,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-19 05:03:35,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2023-11-19 05:03:35,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 05:03:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-19 05:03:35,039 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 7 [2023-11-19 05:03:35,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:35,041 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-19 05:03:35,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:03:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-19 05:03:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 05:03:35,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:35,045 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:03:35,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:03:35,046 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:35,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:35,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1400921599, now seen corresponding path program 1 times [2023-11-19 05:03:35,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:35,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951365603] [2023-11-19 05:03:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:35,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:03:38,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:38,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951365603] [2023-11-19 05:03:38,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951365603] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:03:38,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310461139] [2023-11-19 05:03:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:38,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:03:38,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:03:38,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:03:38,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:03:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:38,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 05:03:38,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:03:38,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 05:03:38,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 05:03:38,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 57 [2023-11-19 05:03:38,710 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 15 [2023-11-19 05:03:38,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-19 05:03:38,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-19 05:03:38,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 57 [2023-11-19 05:03:38,847 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 20 treesize of output 9 [2023-11-19 05:03:38,852 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 9 treesize of output 7 [2023-11-19 05:03:38,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-19 05:03:38,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 57 [2023-11-19 05:03:38,985 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 15 [2023-11-19 05:03:38,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-19 05:03:39,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-11-19 05:03:39,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:03:39,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 75 [2023-11-19 05:03:39,176 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 39 treesize of output 25 [2023-11-19 05:03:39,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-19 05:03:39,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-11-19 05:03:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:03:39,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:03:39,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:03:39,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2023-11-19 05:03:39,724 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 05:03:39,724 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 17 treesize of output 11 [2023-11-19 05:03:39,736 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 [2023-11-19 05:03:39,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:03:39,746 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 26 treesize of output 21 [2023-11-19 05:03:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:03:39,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310461139] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:03:39,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1462198836] [2023-11-19 05:03:39,826 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-19 05:03:39,827 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:03:39,831 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:03:39,837 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:03:39,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:03:45,108 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 1 for LOIs [2023-11-19 05:03:45,110 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:04:17,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '303#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_66| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 2 ~SIZE~0) (<= |ULTIMATE.start_main_~value~0#1| 2147483647) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (exists ((|v_#memory_int_73| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~value~0#1_56| Int) (|v_ULTIMATE.start_main_~value~0#1_57| Int) (|v_ULTIMATE.start_main_~value~0#1_55| Int) (|v_#memory_int_71| (Array Int (Array Int Int))) (|v_#memory_int_72| (Array Int (Array Int Int)))) (and (<= |v_ULTIMATE.start_main_~value~0#1_55| 2147483647) (or (and (= (store |v_#memory_int_71| |ULTIMATE.start_main_~a~0#1.base| (store (select |v_#memory_int_71| |ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_66| 20) (- 32)) 10)) |v_#memory_int_72|) (= |v_ULTIMATE.start_main_~value~0#1_56| 0)) (and (not (= |v_ULTIMATE.start_main_~value~0#1_56| 0)) (= |v_#memory_int_72| (store |v_#memory_int_71| |ULTIMATE.start_main_~a~0#1.base| (store (select |v_#memory_int_71| |ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_66| 20) (- 32)) |v_ULTIMATE.start_main_~value~0#1_56|))))) (<= 0 (+ |v_ULTIMATE.start_main_~value~0#1_57| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~value~0#1_56| 2147483648)) (or (and (= |v_ULTIMATE.start_main_~value~0#1_55| 0) (exists ((|v_#memory_int_70| (Array Int (Array Int Int)))) (= (store |v_#memory_int_70| |ULTIMATE.start_main_~a~0#1.base| (store (select |v_#memory_int_70| |ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_66| 20) (- 36)) 10)) |v_#memory_int_71|))) (and (not (= |v_ULTIMATE.start_main_~value~0#1_55| 0)) (exists ((|v_#memory_int_70| (Array Int (Array Int Int)))) (= |v_#memory_int_71| (store |v_#memory_int_70| |ULTIMATE.start_main_~a~0#1.base| (store (select |v_#memory_int_70| |ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_66| 20) (- 36)) |v_ULTIMATE.start_main_~value~0#1_55|)))))) (<= |v_ULTIMATE.start_main_~value~0#1_56| 2147483647) (or (and (not (= 0 |ULTIMATE.start_main_~value~0#1|)) (= |#memory_int| (store |v_#memory_int_73| |ULTIMATE.start_main_~a~0#1.base| (store (select |v_#memory_int_73| |ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_66| 20) (- 24)) |ULTIMATE.start_main_~value~0#1|)))) (and (= (store |v_#memory_int_73| |ULTIMATE.start_main_~a~0#1.base| (store (select |v_#memory_int_73| |ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_66| 20) (- 24)) 10)) |#memory_int|) (= 0 |ULTIMATE.start_main_~value~0#1|))) (<= 0 (+ |v_ULTIMATE.start_main_~value~0#1_55| 2147483648)) (or (and (= |v_#memory_int_73| (store |v_#memory_int_72| |ULTIMATE.start_main_~a~0#1.base| (store (select |v_#memory_int_72| |ULTIMATE.start_main_~a~0#1.base|) (+ (- 28) (* |v_ULTIMATE.start_main_~i~0#1_66| 20)) |v_ULTIMATE.start_main_~value~0#1_57|))) (not (= |v_ULTIMATE.start_main_~value~0#1_57| 0))) (and (= (store |v_#memory_int_72| |ULTIMATE.start_main_~a~0#1.base| (store (select |v_#memory_int_72| |ULTIMATE.start_main_~a~0#1.base|) (+ (- 28) (* |v_ULTIMATE.start_main_~i~0#1_66| 20)) 10)) |v_#memory_int_73|) (= |v_ULTIMATE.start_main_~value~0#1_57| 0))) (<= |v_ULTIMATE.start_main_~value~0#1_57| 2147483647))) (<= (+ (div ~SIZE~0 5) 1) |v_ULTIMATE.start_main_~i~0#1_66|) (<= 2 |v_ULTIMATE.start_main_~i~0#1_66|) (<= ~SIZE~0 99999) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~value~0#1|)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-19 05:04:17,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:04:17,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:04:17,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-11-19 05:04:17,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212894424] [2023-11-19 05:04:17,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:04:17,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 05:04:17,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:17,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 05:04:17,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1016, Unknown=20, NotChecked=0, Total=1190 [2023-11-19 05:04:17,037 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 7 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-19 05:04:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:18,210 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-11-19 05:04:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 05:04:18,211 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 7 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 28 [2023-11-19 05:04:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:18,213 INFO L225 Difference]: With dead ends: 42 [2023-11-19 05:04:18,214 INFO L226 Difference]: Without dead ends: 40 [2023-11-19 05:04:18,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=321, Invalid=1726, Unknown=23, NotChecked=0, Total=2070 [2023-11-19 05:04:18,217 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 112 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:18,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 66 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:04:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-19 05:04:18,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2023-11-19 05:04:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 05:04:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-19 05:04:18,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2023-11-19 05:04:18,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:18,231 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-19 05:04:18,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 7 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-19 05:04:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-19 05:04:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 05:04:18,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:18,234 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:18,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:04:18,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 05:04:18,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:18,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:18,444 INFO L85 PathProgramCache]: Analyzing trace with hash -652519913, now seen corresponding path program 1 times [2023-11-19 05:04:18,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:18,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5961322] [2023-11-19 05:04:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:18,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:04:19,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:19,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5961322] [2023-11-19 05:04:19,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5961322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:19,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400176934] [2023-11-19 05:04:19,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:19,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:19,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:19,649 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:19,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f7da05-b74f-49d8-bf42-9c896e7c8e68/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:04:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:19,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 05:04:19,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:19,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 39 [2023-11-19 05:04:19,912 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:04:19,921 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 16 treesize of output 5 [2023-11-19 05:04:19,926 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 5 treesize of output 3 [2023-11-19 05:04:20,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 57 [2023-11-19 05:04:20,028 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 9 treesize of output 7 [2023-11-19 05:04:20,049 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 28 treesize of output 16 [2023-11-19 05:04:20,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-19 05:04:20,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 57 [2023-11-19 05:04:20,127 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:04:20,136 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 35 treesize of output 21 [2023-11-19 05:04:20,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-11-19 05:04:20,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:04:20,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 75 [2023-11-19 05:04:20,255 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 39 treesize of output 25 [2023-11-19 05:04:20,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-19 05:04:20,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-11-19 05:04:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:04:20,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:04:20,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:04:20,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2023-11-19 05:04:20,916 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 58 treesize of output 42 [2023-11-19 05:04:20,934 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 05:04:20,934 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 19 treesize of output 11 [2023-11-19 05:04:20,947 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 8 treesize of output 4 [2023-11-19 05:04:20,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:04:20,967 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 27 treesize of output 20 [2023-11-19 05:04:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:04:21,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400176934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:04:21,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [751161067] [2023-11-19 05:04:21,071 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-19 05:04:21,071 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:04:21,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:04:21,072 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:04:21,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:04:26,170 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 1 for LOIs [2023-11-19 05:04:26,171 INFO L180 IcfgInterpreter]: Interpretation finished