./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91 --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 df76811034b688387cfe28dd1eb6de91c21580662ac8ddb8163b41c1d6179172 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:06:41,051 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:06:41,120 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:06:41,125 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:06:41,126 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:06:41,150 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:06:41,151 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:06:41,152 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:06:41,153 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:06:41,154 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:06:41,154 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:06:41,155 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:06:41,156 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:06:41,156 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:06:41,157 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:06:41,158 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:06:41,158 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:06:41,159 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:06:41,159 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:06:41,160 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:06:41,161 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:06:41,161 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:06:41,162 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:06:41,163 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:06:41,163 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:06:41,164 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:06:41,164 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:06:41,165 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:06:41,165 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:06:41,166 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:06:41,166 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:06:41,167 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:06:41,167 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:06:41,168 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:06:41,168 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:06:41,169 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:06:41,169 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:06:41,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:41,171 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:06:41,171 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:06:41,172 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:06:41,172 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:06:41,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:06:41,173 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:06:41,174 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:06:41,174 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:06:41,175 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:06:41,175 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_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df76811034b688387cfe28dd1eb6de91c21580662ac8ddb8163b41c1d6179172 [2023-11-25 00:06:41,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:06:41,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:06:41,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:06:41,521 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:06:41,522 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:06:41,523 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c [2023-11-25 00:06:44,706 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:06:44,938 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:06:44,939 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c [2023-11-25 00:06:44,947 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/data/f301a222f/6b99bee5e6204bff9a38337b49a93a00/FLAGc164b24e7 [2023-11-25 00:06:44,962 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/data/f301a222f/6b99bee5e6204bff9a38337b49a93a00 [2023-11-25 00:06:44,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:06:44,966 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:06:44,967 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:44,968 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:06:44,973 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:06:44,974 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:44" (1/1) ... [2023-11-25 00:06:44,975 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e37ae3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:44, skipping insertion in model container [2023-11-25 00:06:44,975 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:44" (1/1) ... [2023-11-25 00:06:45,000 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:06:45,201 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_dedf5836-d9f5-413b-9a7d-29f73f8549f1/sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c[333,346] [2023-11-25 00:06:45,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:45,246 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:06:45,259 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_dedf5836-d9f5-413b-9a7d-29f73f8549f1/sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c[333,346] [2023-11-25 00:06:45,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:45,286 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:06:45,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45 WrapperNode [2023-11-25 00:06:45,286 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:45,288 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:06:45,288 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:06:45,288 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:06:45,296 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,308 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,334 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-11-25 00:06:45,337 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:06:45,337 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:06:45,338 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:06:45,338 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:06:45,349 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,359 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,359 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,365 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,370 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,371 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,372 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,374 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:06:45,375 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:06:45,376 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:06:45,376 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:06:45,377 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:45,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:45,434 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:06:45,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:06:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:06:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:06:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:06:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:06:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:06:45,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:06:45,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:06:45,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:06:45,569 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:06:45,572 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:06:45,779 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:06:45,822 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:06:45,822 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-25 00:06:45,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:06:45 BoogieIcfgContainer [2023-11-25 00:06:45,824 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:06:45,859 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:06:45,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:06:45,863 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:06:45,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:06:44" (1/3) ... [2023-11-25 00:06:45,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d8b7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:06:45, skipping insertion in model container [2023-11-25 00:06:45,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (2/3) ... [2023-11-25 00:06:45,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d8b7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:06:45, skipping insertion in model container [2023-11-25 00:06:45,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:06:45" (3/3) ... [2023-11-25 00:06:45,867 INFO L112 eAbstractionObserver]: Analyzing ICFG init-non-constant-3-u.c [2023-11-25 00:06:45,887 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:06:45,888 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:06:45,937 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:06:45,945 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;@384b6d04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:06:45,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:06:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:45,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-25 00:06:45,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:45,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:45,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:45,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:45,964 INFO L85 PathProgramCache]: Analyzing trace with hash -368862215, now seen corresponding path program 1 times [2023-11-25 00:06:45,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:45,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342141820] [2023-11-25 00:06:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:45,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:46,076 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:06:46,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492757316] [2023-11-25 00:06:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:46,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:46,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:46,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:46,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:06:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:46,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:06:46,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:46,303 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:46,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:46,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342141820] [2023-11-25 00:06:46,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:06:46,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492757316] [2023-11-25 00:06:46,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492757316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:46,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:46,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:06:46,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832358211] [2023-11-25 00:06:46,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:46,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:06:46,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:46,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:06:46,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:06:46,352 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:46,422 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2023-11-25 00:06:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:06:46,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-25 00:06:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:46,433 INFO L225 Difference]: With dead ends: 23 [2023-11-25 00:06:46,434 INFO L226 Difference]: Without dead ends: 14 [2023-11-25 00:06:46,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:06:46,441 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:46,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:06:46,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-25 00:06:46,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2023-11-25 00:06:46,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:46,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2023-11-25 00:06:46,481 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 7 [2023-11-25 00:06:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:46,482 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2023-11-25 00:06:46,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2023-11-25 00:06:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-25 00:06:46,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:46,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:46,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:46,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-25 00:06:46,690 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:46,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:46,691 INFO L85 PathProgramCache]: Analyzing trace with hash -861472263, now seen corresponding path program 1 times [2023-11-25 00:06:46,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:46,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332258163] [2023-11-25 00:06:46,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:46,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:46,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:06:46,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237854082] [2023-11-25 00:06:46,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:46,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:46,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:46,704 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:46,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:06:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:46,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:06:46,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:46,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:46,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:46,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332258163] [2023-11-25 00:06:46,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:06:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237854082] [2023-11-25 00:06:46,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237854082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:46,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:46,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:06:46,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838570640] [2023-11-25 00:06:46,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:46,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:06:46,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:46,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:06:46,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:06:46,813 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:46,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:46,876 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2023-11-25 00:06:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:06:46,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-25 00:06:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:46,879 INFO L225 Difference]: With dead ends: 31 [2023-11-25 00:06:46,879 INFO L226 Difference]: Without dead ends: 21 [2023-11-25 00:06:46,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:06:46,883 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:46,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 8 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:06:46,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-25 00:06:46,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2023-11-25 00:06:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2023-11-25 00:06:46,900 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2023-11-25 00:06:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:46,901 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2023-11-25 00:06:46,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2023-11-25 00:06:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-25 00:06:46,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:46,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:46,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-25 00:06:47,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:47,111 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:47,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:47,112 INFO L85 PathProgramCache]: Analyzing trace with hash -186889216, now seen corresponding path program 1 times [2023-11-25 00:06:47,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:47,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204586796] [2023-11-25 00:06:47,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:47,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:47,130 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:06:47,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638241520] [2023-11-25 00:06:47,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:47,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:47,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:47,136 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:47,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:06:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:47,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:06:47,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:47,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:47,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:47,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204586796] [2023-11-25 00:06:47,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:06:47,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638241520] [2023-11-25 00:06:47,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638241520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:47,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:47,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:06:47,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026538504] [2023-11-25 00:06:47,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:47,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:06:47,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:47,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:06:47,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:06:47,237 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2023-11-25 00:06:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:47,298 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2023-11-25 00:06:47,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:06:47,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 [2023-11-25 00:06:47,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:47,299 INFO L225 Difference]: With dead ends: 33 [2023-11-25 00:06:47,300 INFO L226 Difference]: Without dead ends: 21 [2023-11-25 00:06:47,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:06:47,304 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:47,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 6 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:06:47,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-25 00:06:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2023-11-25 00:06:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 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) [2023-11-25 00:06:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-11-25 00:06:47,320 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 11 [2023-11-25 00:06:47,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:47,323 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-11-25 00:06:47,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2023-11-25 00:06:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-11-25 00:06:47,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-25 00:06:47,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:47,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:47,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:47,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:47,530 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:47,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:47,531 INFO L85 PathProgramCache]: Analyzing trace with hash 458831821, now seen corresponding path program 1 times [2023-11-25 00:06:47,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:47,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071426754] [2023-11-25 00:06:47,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:47,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:47,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:06:47,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376000503] [2023-11-25 00:06:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:47,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:47,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:47,543 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:47,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:06:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:47,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:06:47,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:47,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:47,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:47,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071426754] [2023-11-25 00:06:47,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:06:47,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376000503] [2023-11-25 00:06:47,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376000503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:47,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1049606678] [2023-11-25 00:06:47,721 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-25 00:06:47,721 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:06:47,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:06:47,732 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:06:47,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:06:49,001 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:06:49,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '378#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_48| Int) (|v_ULTIMATE.start_main_~j~0#1_55| Int) (|v_ULTIMATE.start_main_~k~0#1_51| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_55|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_48|) (<= 0 |v_ULTIMATE.start_main_~k~0#1_51|))) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= (mod |ULTIMATE.start_main_#t~mem5#1| 4294967296) (mod |ULTIMATE.start_main_~C~0#1| 4294967296))) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-25 00:06:49,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:06:49,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:06:49,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-25 00:06:49,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544261861] [2023-11-25 00:06:49,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:06:49,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:06:49,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:49,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:06:49,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:06:49,604 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:49,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:49,712 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2023-11-25 00:06:49,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:06:49,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-25 00:06:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:49,714 INFO L225 Difference]: With dead ends: 49 [2023-11-25 00:06:49,714 INFO L226 Difference]: Without dead ends: 35 [2023-11-25 00:06:49,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:06:49,716 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:49,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 12 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:06:49,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-25 00:06:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2023-11-25 00:06:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2023-11-25 00:06:49,724 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 12 [2023-11-25 00:06:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:49,725 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2023-11-25 00:06:49,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2023-11-25 00:06:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-25 00:06:49,726 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:49,726 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:49,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:49,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:49,932 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:49,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:49,933 INFO L85 PathProgramCache]: Analyzing trace with hash 580867904, now seen corresponding path program 2 times [2023-11-25 00:06:49,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:49,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288711215] [2023-11-25 00:06:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:49,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:49,953 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:06:49,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698556931] [2023-11-25 00:06:49,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:06:49,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:49,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:49,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:49,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:06:50,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-25 00:06:50,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:06:50,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:06:50,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-25 00:06:50,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-25 00:06:50,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:50,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288711215] [2023-11-25 00:06:50,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:06:50,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698556931] [2023-11-25 00:06:50,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698556931] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:50,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [26603557] [2023-11-25 00:06:50,104 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-25 00:06:50,104 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:06:50,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:06:50,105 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:06:50,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:06:50,684 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:06:51,209 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '600#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (exists ((|v_ULTIMATE.start_main_~i~0#1_59| Int) (|v_ULTIMATE.start_main_~k~0#1_76| Int) (|v_ULTIMATE.start_main_~j~0#1_72| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_72|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_59|) (<= 0 |v_ULTIMATE.start_main_~k~0#1_76|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= (mod |ULTIMATE.start_main_#t~mem5#1| 4294967296) (mod |ULTIMATE.start_main_~C~0#1| 4294967296))) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-25 00:06:51,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:06:51,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:06:51,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-25 00:06:51,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955485300] [2023-11-25 00:06:51,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:06:51,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:06:51,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:51,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:06:51,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:06:51,213 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:51,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:51,317 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2023-11-25 00:06:51,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:06:51,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-25 00:06:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:51,320 INFO L225 Difference]: With dead ends: 70 [2023-11-25 00:06:51,320 INFO L226 Difference]: Without dead ends: 52 [2023-11-25 00:06:51,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:06:51,322 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:51,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 13 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:06:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-25 00:06:51,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-25 00:06:51,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 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) [2023-11-25 00:06:51,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2023-11-25 00:06:51,335 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 15 [2023-11-25 00:06:51,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:51,335 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2023-11-25 00:06:51,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:51,336 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2023-11-25 00:06:51,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-25 00:06:51,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:51,337 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:51,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:51,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:51,543 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:51,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:51,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1938997483, now seen corresponding path program 3 times [2023-11-25 00:06:51,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:51,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807148359] [2023-11-25 00:06:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:51,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:51,562 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:06:51,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424916058] [2023-11-25 00:06:51,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:06:51,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:51,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:51,564 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:51,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:06:51,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:06:51,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:06:51,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-25 00:06:51,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 97 proven. 5 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-25 00:06:51,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 97 proven. 5 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-25 00:06:51,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:51,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807148359] [2023-11-25 00:06:51,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:06:51,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424916058] [2023-11-25 00:06:51,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424916058] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:51,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [417016355] [2023-11-25 00:06:51,838 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-25 00:06:51,838 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:06:51,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:06:51,839 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:06:51,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:06:52,447 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:06:53,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1062#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~k~0#1_127| Int) (|v_ULTIMATE.start_main_~j~0#1_101| Int) (|v_ULTIMATE.start_main_~i~0#1_76| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_101|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_76|) (<= 0 |v_ULTIMATE.start_main_~k~0#1_127|))) (= |ULTIMATE.start_main_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= (mod |ULTIMATE.start_main_#t~mem5#1| 4294967296) (mod |ULTIMATE.start_main_~C~0#1| 4294967296))) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-25 00:06:53,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:06:53,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:06:53,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-25 00:06:53,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296249182] [2023-11-25 00:06:53,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:06:53,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-25 00:06:53,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:53,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-25 00:06:53,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2023-11-25 00:06:53,056 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:53,592 INFO L93 Difference]: Finished difference Result 232 states and 289 transitions. [2023-11-25 00:06:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-25 00:06:53,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-25 00:06:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:53,599 INFO L225 Difference]: With dead ends: 232 [2023-11-25 00:06:53,600 INFO L226 Difference]: Without dead ends: 189 [2023-11-25 00:06:53,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2023-11-25 00:06:53,603 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 143 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:53,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 86 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:06:53,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-25 00:06:53,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 166. [2023-11-25 00:06:53,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2545454545454546) internal successors, (207), 165 states have internal predecessors, (207), 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) [2023-11-25 00:06:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2023-11-25 00:06:53,663 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 39 [2023-11-25 00:06:53,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:53,664 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2023-11-25 00:06:53,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:53,664 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2023-11-25 00:06:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-25 00:06:53,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:53,670 INFO L195 NwaCegarLoop]: trace histogram [64, 16, 16, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:53,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:53,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-25 00:06:53,877 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:53,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:53,877 INFO L85 PathProgramCache]: Analyzing trace with hash 23857257, now seen corresponding path program 4 times [2023-11-25 00:06:53,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:53,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973527733] [2023-11-25 00:06:53,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:53,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:53,949 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:06:53,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139210326] [2023-11-25 00:06:53,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-25 00:06:53,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:53,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:53,951 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:53,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-25 00:06:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:54,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-25 00:06:54,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3360 backedges. 398 proven. 10 refuted. 0 times theorem prover too weak. 2952 trivial. 0 not checked. [2023-11-25 00:06:54,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3360 backedges. 398 proven. 10 refuted. 0 times theorem prover too weak. 2952 trivial. 0 not checked. [2023-11-25 00:06:54,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:54,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973527733] [2023-11-25 00:06:54,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:06:54,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139210326] [2023-11-25 00:06:54,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139210326] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:54,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2105182131] [2023-11-25 00:06:54,342 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-25 00:06:54,342 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:06:54,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:06:54,343 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:06:54,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:06:54,887 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:06:55,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2471#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= (mod |ULTIMATE.start_main_#t~mem5#1| 4294967296) (mod |ULTIMATE.start_main_~C~0#1| 4294967296))) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (exists ((|v_ULTIMATE.start_main_~k~0#1_239| Int) (|v_ULTIMATE.start_main_~j~0#1_141| Int) (|v_ULTIMATE.start_main_~i~0#1_93| Int)) (and (<= 0 |v_ULTIMATE.start_main_~k~0#1_239|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_141|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_93|))) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-25 00:06:55,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:06:55,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:06:55,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-25 00:06:55,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482878421] [2023-11-25 00:06:55,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:06:55,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-25 00:06:55,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:55,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-25 00:06:55,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-11-25 00:06:55,394 INFO L87 Difference]: Start difference. First operand 166 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2023-11-25 00:06:55,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:55,674 INFO L93 Difference]: Finished difference Result 511 states and 727 transitions. [2023-11-25 00:06:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-25 00:06:55,674 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) Word has length 111 [2023-11-25 00:06:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:55,677 INFO L225 Difference]: With dead ends: 511 [2023-11-25 00:06:55,677 INFO L226 Difference]: Without dead ends: 353 [2023-11-25 00:06:55,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2023-11-25 00:06:55,683 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 193 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:55,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 30 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:06:55,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-25 00:06:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 334. [2023-11-25 00:06:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.1981981981981982) internal successors, (399), 333 states have internal predecessors, (399), 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) [2023-11-25 00:06:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 399 transitions. [2023-11-25 00:06:55,778 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 399 transitions. Word has length 111 [2023-11-25 00:06:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:55,779 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 399 transitions. [2023-11-25 00:06:55,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2023-11-25 00:06:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 399 transitions. [2023-11-25 00:06:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-25 00:06:55,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:55,796 INFO L195 NwaCegarLoop]: trace histogram [160, 16, 16, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:55,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:56,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-25 00:06:56,008 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:56,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:56,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1469824919, now seen corresponding path program 5 times [2023-11-25 00:06:56,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:56,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495708626] [2023-11-25 00:06:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:56,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:56,097 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:06:56,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782179312] [2023-11-25 00:06:56,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:06:56,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:56,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:56,099 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:56,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-25 00:06:58,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-11-25 00:06:58,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:06:58,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-25 00:06:58,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 15600 backedges. 1838 proven. 55 refuted. 0 times theorem prover too weak. 13707 trivial. 0 not checked. [2023-11-25 00:06:58,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 15600 backedges. 23 proven. 1870 refuted. 0 times theorem prover too weak. 13707 trivial. 0 not checked. [2023-11-25 00:06:59,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:59,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495708626] [2023-11-25 00:06:59,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:06:59,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782179312] [2023-11-25 00:06:59,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782179312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:59,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1235343359] [2023-11-25 00:06:59,122 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-25 00:06:59,122 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:06:59,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:06:59,123 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:06:59,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:06:59,596 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:07:00,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5221#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= (mod |ULTIMATE.start_main_#t~mem5#1| 4294967296) (mod |ULTIMATE.start_main_~C~0#1| 4294967296))) (= |ULTIMATE.start_main_~k~0#1| 0) (exists ((|v_ULTIMATE.start_main_~k~0#1_448| Int) (|v_ULTIMATE.start_main_~j~0#1_176| Int) (|v_ULTIMATE.start_main_~i~0#1_106| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_106|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_176|) (<= 0 |v_ULTIMATE.start_main_~k~0#1_448|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-25 00:07:00,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:07:00,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:07:00,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-11-25 00:07:00,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834815082] [2023-11-25 00:07:00,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:07:00,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-25 00:07:00,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:00,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-25 00:07:00,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=663, Unknown=0, NotChecked=0, Total=992 [2023-11-25 00:07:00,050 INFO L87 Difference]: Start difference. First operand 334 states and 399 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 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) [2023-11-25 00:07:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:00,662 INFO L93 Difference]: Finished difference Result 1033 states and 1429 transitions. [2023-11-25 00:07:00,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-25 00:07:00,663 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 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 207 [2023-11-25 00:07:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:00,667 INFO L225 Difference]: With dead ends: 1033 [2023-11-25 00:07:00,667 INFO L226 Difference]: Without dead ends: 713 [2023-11-25 00:07:00,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=615, Invalid=1191, Unknown=0, NotChecked=0, Total=1806 [2023-11-25 00:07:00,670 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 332 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:00,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 66 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:07:00,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2023-11-25 00:07:00,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 670. [2023-11-25 00:07:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 1.1704035874439462) internal successors, (783), 669 states have internal predecessors, (783), 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) [2023-11-25 00:07:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 783 transitions. [2023-11-25 00:07:00,757 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 783 transitions. Word has length 207 [2023-11-25 00:07:00,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:00,757 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 783 transitions. [2023-11-25 00:07:00,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 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) [2023-11-25 00:07:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 783 transitions. [2023-11-25 00:07:00,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2023-11-25 00:07:00,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:00,765 INFO L195 NwaCegarLoop]: trace histogram [352, 16, 16, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:00,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-25 00:07:00,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:00,976 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:00,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:00,976 INFO L85 PathProgramCache]: Analyzing trace with hash -966512535, now seen corresponding path program 6 times [2023-11-25 00:07:00,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:00,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465753377] [2023-11-25 00:07:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:00,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:01,130 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:07:01,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805443525] [2023-11-25 00:07:01,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:07:01,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:01,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:01,132 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:07:01,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-25 00:07:02,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:07:02,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:07:02,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 2612 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-25 00:07:02,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 67728 backedges. 25702 proven. 3206 refuted. 0 times theorem prover too weak. 38820 trivial. 0 not checked. [2023-11-25 00:07:02,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:07:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 67728 backedges. 25702 proven. 3206 refuted. 0 times theorem prover too weak. 38820 trivial. 0 not checked. [2023-11-25 00:07:03,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:03,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465753377] [2023-11-25 00:07:03,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:07:03,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805443525] [2023-11-25 00:07:03,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805443525] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:07:03,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [648846469] [2023-11-25 00:07:03,585 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-25 00:07:03,585 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:07:03,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:07:03,586 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:07:03,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:07:04,074 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:07:04,922 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10619#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= (mod |ULTIMATE.start_main_#t~mem5#1| 4294967296) (mod |ULTIMATE.start_main_~C~0#1| 4294967296))) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (exists ((|v_ULTIMATE.start_main_~j~0#1_215| Int) (|v_ULTIMATE.start_main_~i~0#1_119| Int) (|v_ULTIMATE.start_main_~k~0#1_860| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_119|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_215|) (<= 0 |v_ULTIMATE.start_main_~k~0#1_860|))))' at error location [2023-11-25 00:07:04,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:07:04,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:07:04,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2023-11-25 00:07:04,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065501695] [2023-11-25 00:07:04,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:07:04,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-25 00:07:04,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:04,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-25 00:07:04,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=2755, Unknown=0, NotChecked=0, Total=4032 [2023-11-25 00:07:04,929 INFO L87 Difference]: Start difference. First operand 670 states and 783 transitions. Second operand has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 58 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:07:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:08,724 INFO L93 Difference]: Finished difference Result 2380 states and 2716 transitions. [2023-11-25 00:07:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-11-25 00:07:08,725 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 58 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 399 [2023-11-25 00:07:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:08,736 INFO L225 Difference]: With dead ends: 2380 [2023-11-25 00:07:08,736 INFO L226 Difference]: Without dead ends: 1809 [2023-11-25 00:07:08,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1300 GetRequests, 1134 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10696 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=8509, Invalid=19547, Unknown=0, NotChecked=0, Total=28056 [2023-11-25 00:07:08,750 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 535 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:08,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 701 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:07:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2023-11-25 00:07:08,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1654. [2023-11-25 00:07:08,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 1.1669691470054446) internal successors, (1929), 1653 states have internal predecessors, (1929), 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) [2023-11-25 00:07:08,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 1929 transitions. [2023-11-25 00:07:08,972 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 1929 transitions. Word has length 399 [2023-11-25 00:07:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:08,973 INFO L495 AbstractCegarLoop]: Abstraction has 1654 states and 1929 transitions. [2023-11-25 00:07:08,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 58 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:07:08,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 1929 transitions. [2023-11-25 00:07:09,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2023-11-25 00:07:09,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:09,012 INFO L195 NwaCegarLoop]: trace histogram [880, 40, 40, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:09,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-25 00:07:09,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-25 00:07:09,218 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:09,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:09,219 INFO L85 PathProgramCache]: Analyzing trace with hash -980550895, now seen corresponding path program 7 times [2023-11-25 00:07:09,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:09,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67136041] [2023-11-25 00:07:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:09,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:09,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:07:09,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477855080] [2023-11-25 00:07:09,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-25 00:07:09,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:09,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:09,631 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:07:09,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-25 00:07:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:11,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 6498 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-25 00:07:11,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 423696 backedges. 20678 proven. 253 refuted. 0 times theorem prover too weak. 402765 trivial. 0 not checked. [2023-11-25 00:07:12,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:07:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 423696 backedges. 20678 proven. 253 refuted. 0 times theorem prover too weak. 402765 trivial. 0 not checked. [2023-11-25 00:07:13,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:13,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67136041] [2023-11-25 00:07:13,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:07:13,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477855080] [2023-11-25 00:07:13,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477855080] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:07:13,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2103800175] [2023-11-25 00:07:13,031 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-25 00:07:13,031 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:07:13,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:07:13,032 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:07:13,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:07:13,452 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:07:13,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23578#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= (mod |ULTIMATE.start_main_#t~mem5#1| 4294967296) (mod |ULTIMATE.start_main_~C~0#1| 4294967296))) (exists ((|v_ULTIMATE.start_main_~j~0#1_274| Int) (|v_ULTIMATE.start_main_~i~0#1_132| Int) (|v_ULTIMATE.start_main_~k~0#1_1825| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_274|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_132|) (<= 0 |v_ULTIMATE.start_main_~k~0#1_1825|))) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-25 00:07:13,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:07:13,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:07:13,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2023-11-25 00:07:13,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175748928] [2023-11-25 00:07:13,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:07:14,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-25 00:07:14,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:14,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-25 00:07:14,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=1875, Unknown=0, NotChecked=0, Total=3080 [2023-11-25 00:07:14,003 INFO L87 Difference]: Start difference. First operand 1654 states and 1929 transitions. Second operand has 50 states, 50 states have (on average 1.26) internal successors, (63), 49 states have internal predecessors, (63), 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) [2023-11-25 00:07:15,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:15,891 INFO L93 Difference]: Finished difference Result 5053 states and 6997 transitions. [2023-11-25 00:07:15,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-25 00:07:15,891 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 49 states have internal predecessors, (63), 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 975 [2023-11-25 00:07:15,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:15,912 INFO L225 Difference]: With dead ends: 5053 [2023-11-25 00:07:15,912 INFO L226 Difference]: Without dead ends: 3425 [2023-11-25 00:07:15,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2946 GetRequests, 2869 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2355, Invalid=3807, Unknown=0, NotChecked=0, Total=6162 [2023-11-25 00:07:15,918 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 757 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:15,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 138 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:07:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3425 states. [2023-11-25 00:07:16,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3425 to 3334. [2023-11-25 00:07:16,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3333 states have (on average 1.1548154815481548) internal successors, (3849), 3333 states have internal predecessors, (3849), 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) [2023-11-25 00:07:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 3849 transitions. [2023-11-25 00:07:16,433 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 3849 transitions. Word has length 975 [2023-11-25 00:07:16,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:16,434 INFO L495 AbstractCegarLoop]: Abstraction has 3334 states and 3849 transitions. [2023-11-25 00:07:16,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 49 states have internal predecessors, (63), 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) [2023-11-25 00:07:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 3849 transitions. [2023-11-25 00:07:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1936 [2023-11-25 00:07:16,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:16,466 INFO L195 NwaCegarLoop]: trace histogram [1840, 40, 40, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:16,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-25 00:07:16,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-25 00:07:16,688 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:16,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:16,688 INFO L85 PathProgramCache]: Analyzing trace with hash 838486801, now seen corresponding path program 8 times [2023-11-25 00:07:16,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:16,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934459880] [2023-11-25 00:07:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:16,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:17,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:07:17,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56616861] [2023-11-25 00:07:17,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:07:17,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:17,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:17,488 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:07:17,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dedf5836-d9f5-413b-9a7d-29f73f8549f1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process