./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.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_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/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_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/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_c008a65f-35ed-4289-a42d-6ac3d73d565c/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 cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:53:48,761 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:53:48,871 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:53:48,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:53:48,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:53:48,909 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:53:48,909 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:53:48,910 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:53:48,911 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:53:48,912 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:53:48,912 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:53:48,913 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:53:48,913 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:53:48,914 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:53:48,915 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:53:48,915 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:53:48,916 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:53:48,916 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:53:48,917 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:53:48,918 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:53:48,918 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:53:48,923 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:53:48,924 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:53:48,925 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:53:48,925 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:53:48,926 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:53:48,926 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:53:48,926 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:53:48,927 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:53:48,927 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:53:48,929 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:53:48,929 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:53:48,929 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:53:48,930 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:53:48,930 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:53:48,930 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:53:48,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:53:48,931 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:53:48,931 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:53:48,931 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:53:48,932 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:53:48,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:53:48,932 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:53:48,932 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:53:48,933 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:53:48,933 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_c008a65f-35ed-4289-a42d-6ac3d73d565c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 [2023-11-19 04:53:49,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:53:49,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:53:49,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:53:49,275 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:53:49,276 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:53:49,277 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2023-11-19 04:53:52,390 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:53:52,646 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:53:52,647 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2023-11-19 04:53:52,655 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/data/742bb7323/8ddeef5ffde343889dc0e40af2ec48f1/FLAG520208be4 [2023-11-19 04:53:52,671 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/data/742bb7323/8ddeef5ffde343889dc0e40af2ec48f1 [2023-11-19 04:53:52,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:53:52,676 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:53:52,677 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:53:52,678 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:53:52,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:53:52,684 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:53:52" (1/1) ... [2023-11-19 04:53:52,685 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44e03b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:52, skipping insertion in model container [2023-11-19 04:53:52,686 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:53:52" (1/1) ... [2023-11-19 04:53:52,711 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:53:52,862 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_c008a65f-35ed-4289-a42d-6ac3d73d565c/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c[322,335] [2023-11-19 04:53:52,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:53:52,897 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:53:52,910 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_c008a65f-35ed-4289-a42d-6ac3d73d565c/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c[322,335] [2023-11-19 04:53:52,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:53:52,940 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:53:52,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:52 WrapperNode [2023-11-19 04:53:52,941 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:53:52,942 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:53:52,942 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:53:52,943 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:53:52,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:52" (1/1) ... [2023-11-19 04:53:52,959 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:52" (1/1) ... [2023-11-19 04:53:52,984 INFO L138 Inliner]: procedures = 14, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 112 [2023-11-19 04:53:52,984 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:53:52,985 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:53:52,986 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:53:52,986 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:53:52,997 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:52" (1/1) ... [2023-11-19 04:53:52,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:52" (1/1) ... [2023-11-19 04:53:53,000 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:52" (1/1) ... [2023-11-19 04:53:53,001 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:52" (1/1) ... [2023-11-19 04:53:53,007 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:52" (1/1) ... [2023-11-19 04:53:53,013 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:52" (1/1) ... [2023-11-19 04:53:53,014 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:52" (1/1) ... [2023-11-19 04:53:53,022 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:52" (1/1) ... [2023-11-19 04:53:53,028 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:53:53,030 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:53:53,030 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:53:53,030 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:53:53,031 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:52" (1/1) ... [2023-11-19 04:53:53,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:53:53,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:53,075 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:53:53,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:53:53,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:53:53,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:53:53,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:53:53,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:53:53,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:53:53,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:53:53,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:53:53,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:53:53,212 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:53:53,214 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:53:53,406 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:53:53,466 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:53:53,467 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-19 04:53:53,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:53:53 BoogieIcfgContainer [2023-11-19 04:53:53,473 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:53:53,476 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:53:53,476 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:53:53,481 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:53:53,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:53:52" (1/3) ... [2023-11-19 04:53:53,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f18bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:53:53, skipping insertion in model container [2023-11-19 04:53:53,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:52" (2/3) ... [2023-11-19 04:53:53,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f18bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:53:53, skipping insertion in model container [2023-11-19 04:53:53,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:53:53" (3/3) ... [2023-11-19 04:53:53,486 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2023-11-19 04:53:53,509 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:53:53,510 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:53:53,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:53:53,573 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;@3075cbde, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:53:53,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:53:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:53:53,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 04:53:53,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:53,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:53,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:53,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:53,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1309612569, now seen corresponding path program 1 times [2023-11-19 04:53:53,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:53,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017582711] [2023-11-19 04:53:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:53,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:53,718 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:53:53,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432774134] [2023-11-19 04:53:53,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:53,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:53,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:53,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:53:53,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:53:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:53,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:53:53,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:53:54,004 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 04:53:54,005 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:53:54,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:54,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017582711] [2023-11-19 04:53:54,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:53:54,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432774134] [2023-11-19 04:53:54,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432774134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:53:54,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:53:54,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:53:54,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432729252] [2023-11-19 04:53:54,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:53:54,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:53:54,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:54,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:53:54,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:53:54,052 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 04:53:54,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:54,146 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2023-11-19 04:53:54,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:53:54,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2023-11-19 04:53:54,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:54,177 INFO L225 Difference]: With dead ends: 27 [2023-11-19 04:53:54,177 INFO L226 Difference]: Without dead ends: 15 [2023-11-19 04:53:54,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:53:54,184 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:54,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:53:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-19 04:53:54,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-11-19 04:53:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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 04:53:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2023-11-19 04:53:54,219 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 8 [2023-11-19 04:53:54,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:54,220 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2023-11-19 04:53:54,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 04:53:54,220 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2023-11-19 04:53:54,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:53:54,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:54,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:54,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:53:54,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 04:53:54,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:54,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:54,446 INFO L85 PathProgramCache]: Analyzing trace with hash -215038707, now seen corresponding path program 1 times [2023-11-19 04:53:54,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:54,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964068747] [2023-11-19 04:53:54,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:54,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:54,465 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:53:54,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581142147] [2023-11-19 04:53:54,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:54,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:54,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:54,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:53:54,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:53:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:54,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:53:54,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:53:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:54,631 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:53:54,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:54,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964068747] [2023-11-19 04:53:54,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:53:54,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581142147] [2023-11-19 04:53:54,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581142147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:53:54,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:53:54,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:53:54,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130735878] [2023-11-19 04:53:54,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:53:54,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:53:54,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:54,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:53:54,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:53:54,638 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 04:53:54,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:54,721 INFO L93 Difference]: Finished difference Result 37 states and 57 transitions. [2023-11-19 04:53:54,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:53:54,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2023-11-19 04:53:54,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:54,725 INFO L225 Difference]: With dead ends: 37 [2023-11-19 04:53:54,725 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 04:53:54,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 04:53:54,728 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:54,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 10 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:53:54,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 04:53:54,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2023-11-19 04:53:54,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:53:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2023-11-19 04:53:54,749 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 10 [2023-11-19 04:53:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:54,749 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2023-11-19 04:53:54,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 04:53:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2023-11-19 04:53:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:53:54,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:54,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:54,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:53:54,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:54,973 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:54,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:54,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1517764035, now seen corresponding path program 1 times [2023-11-19 04:53:54,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:54,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9561868] [2023-11-19 04:53:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:54,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:54,988 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:53:54,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217462643] [2023-11-19 04:53:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:54,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:54,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:54,994 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:53:55,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:53:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:55,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:53:55,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:53:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:55,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:53:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:55,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:55,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9561868] [2023-11-19 04:53:55,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:53:55,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217462643] [2023-11-19 04:53:55,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217462643] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:53:55,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1840022020] [2023-11-19 04:53:55,241 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 04:53:55,242 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:53:55,246 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:53:55,252 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:53:55,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:53:56,218 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:53:56,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1840022020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:53:56,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:53:56,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 11 [2023-11-19 04:53:56,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033649132] [2023-11-19 04:53:56,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:53:56,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:53:56,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:56,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:53:56,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:53:56,569 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:53:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:56,956 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2023-11-19 04:53:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:53:56,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-19 04:53:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:56,958 INFO L225 Difference]: With dead ends: 41 [2023-11-19 04:53:56,958 INFO L226 Difference]: Without dead ends: 29 [2023-11-19 04:53:56,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:53:56,960 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:56,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:53:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-19 04:53:56,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2023-11-19 04:53:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 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 04:53:56,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2023-11-19 04:53:56,979 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 11 [2023-11-19 04:53:56,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:56,979 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2023-11-19 04:53:56,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:53:56,980 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2023-11-19 04:53:56,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:53:56,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:56,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:57,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:53:57,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:57,181 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:57,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:57,182 INFO L85 PathProgramCache]: Analyzing trace with hash 862012475, now seen corresponding path program 1 times [2023-11-19 04:53:57,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:57,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296014851] [2023-11-19 04:53:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:57,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:57,196 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:53:57,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909057673] [2023-11-19 04:53:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:57,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:57,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:57,198 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:53:57,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:53:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:57,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:53:57,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:53:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:53:57,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:53:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:53:57,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:57,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296014851] [2023-11-19 04:53:57,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:53:57,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909057673] [2023-11-19 04:53:57,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909057673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:53:57,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [559163722] [2023-11-19 04:53:57,359 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-19 04:53:57,359 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:53:57,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:53:57,360 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:53:57,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:53:58,403 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:53:58,895 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '512#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) |ULTIMATE.start_main_~#C~0#1.offset|)) (not (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296))) (<= 1 |ULTIMATE.start_main_~m~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (exists ((|v_ULTIMATE.start_main_~j~0#1_100| Int) (|v_ULTIMATE.start_main_~i~0#1_98| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_100|) (<= |ULTIMATE.start_main_~m~0#1| |v_ULTIMATE.start_main_~i~0#1_98|))))' at error location [2023-11-19 04:53:58,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:53:58,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:53:58,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-19 04:53:58,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997520974] [2023-11-19 04:53:58,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:53:58,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:53:58,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:58,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:53:58,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-11-19 04:53:58,898 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 04:53:59,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:59,042 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2023-11-19 04:53:59,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:53:59,043 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-19 04:53:59,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:59,044 INFO L225 Difference]: With dead ends: 63 [2023-11-19 04:53:59,044 INFO L226 Difference]: Without dead ends: 45 [2023-11-19 04:53:59,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:53:59,046 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 91 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:59,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 16 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:53:59,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-19 04:53:59,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2023-11-19 04:53:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 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) [2023-11-19 04:53:59,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-11-19 04:53:59,063 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 17 [2023-11-19 04:53:59,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:59,063 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-11-19 04:53:59,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 04:53:59,063 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-11-19 04:53:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 04:53:59,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:59,065 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:59,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:53:59,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:59,289 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:59,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:59,290 INFO L85 PathProgramCache]: Analyzing trace with hash 883853987, now seen corresponding path program 2 times [2023-11-19 04:53:59,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:59,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575778199] [2023-11-19 04:53:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:59,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:59,313 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:53:59,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237719926] [2023-11-19 04:53:59,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:53:59,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:59,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:59,315 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:53:59,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:53:59,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 04:53:59,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:53:59,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:53:59,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:53:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:53:59,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:53:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:53:59,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:59,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575778199] [2023-11-19 04:53:59,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:53:59,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237719926] [2023-11-19 04:53:59,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237719926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:53:59,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475149280] [2023-11-19 04:53:59,539 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-19 04:53:59,539 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:53:59,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:53:59,540 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:53:59,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:54:00,479 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:54:00,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '853#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) |ULTIMATE.start_main_~#C~0#1.offset|)) (not (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296))) (<= 1 |ULTIMATE.start_main_~m~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (exists ((|v_ULTIMATE.start_main_~j~0#1_149| Int) (|v_ULTIMATE.start_main_~i~0#1_119| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_149|) (<= |ULTIMATE.start_main_~m~0#1| |v_ULTIMATE.start_main_~i~0#1_119|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-19 04:54:00,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:54:00,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:54:00,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-19 04:54:00,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626978603] [2023-11-19 04:54:00,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:54:00,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:54:00,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:54:00,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-11-19 04:54:00,999 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:01,192 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2023-11-19 04:54:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:54:01,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-19 04:54:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:01,200 INFO L225 Difference]: With dead ends: 171 [2023-11-19 04:54:01,201 INFO L226 Difference]: Without dead ends: 141 [2023-11-19 04:54:01,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:54:01,204 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 167 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:01,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 16 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:54:01,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-19 04:54:01,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 92. [2023-11-19 04:54:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 91 states have internal predecessors, (111), 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 04:54:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2023-11-19 04:54:01,256 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 26 [2023-11-19 04:54:01,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:01,257 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2023-11-19 04:54:01,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2023-11-19 04:54:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-19 04:54:01,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:01,262 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:01,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:54:01,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:54:01,477 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:01,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:01,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1008971561, now seen corresponding path program 3 times [2023-11-19 04:54:01,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:01,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092684997] [2023-11-19 04:54:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:01,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:01,546 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:54:01,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109256989] [2023-11-19 04:54:01,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:54:01,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:54:01,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:54:01,548 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:54:01,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c008a65f-35ed-4289-a42d-6ac3d73d565c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process