./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_partition_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partition_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5 --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 6c4a57140d9977d38b2a20d40c88df51a4fcb7b14a0fb7c51e0b4e36cddf9998 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:47:56,198 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:47:56,278 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:47:56,283 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:47:56,284 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:47:56,314 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:47:56,315 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:47:56,316 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:47:56,317 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:47:56,318 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:47:56,318 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:47:56,319 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:47:56,319 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:47:56,320 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:47:56,321 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:47:56,321 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:47:56,322 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:47:56,322 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:47:56,323 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:47:56,324 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:47:56,324 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:47:56,332 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:47:56,333 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:47:56,334 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:47:56,339 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:47:56,339 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:47:56,340 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:47:56,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:47:56,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:47:56,341 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:47:56,342 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:47:56,343 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:47:56,344 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:47:56,344 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:47:56,344 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:47:56,344 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:47:56,345 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:47:56,345 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:47:56,345 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:47:56,346 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:47:56,346 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:47:56,347 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:47:56,347 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:47:56,348 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:47:56,348 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:47:56,348 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:47:56,349 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:47:56,349 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_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c4a57140d9977d38b2a20d40c88df51a4fcb7b14a0fb7c51e0b4e36cddf9998 [2023-11-21 19:47:56,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:47:56,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:47:56,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:47:56,679 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:47:56,680 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:47:56,681 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2023-11-21 19:47:59,953 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:48:00,188 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:48:00,189 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2023-11-21 19:48:00,196 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/data/21c2a7072/8cb52362891e4cc395f61dea43c3ceb4/FLAGb568011e4 [2023-11-21 19:48:00,210 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/data/21c2a7072/8cb52362891e4cc395f61dea43c3ceb4 [2023-11-21 19:48:00,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:48:00,214 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:48:00,216 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:48:00,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:48:00,222 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:48:00,223 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:48:00" (1/1) ... [2023-11-21 19:48:00,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4609fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:00, skipping insertion in model container [2023-11-21 19:48:00,224 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:48:00" (1/1) ... [2023-11-21 19:48:00,251 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:48:00,427 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_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/sv-benchmarks/c/array-examples/standard_partition_ground-1.i[860,873] [2023-11-21 19:48:00,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:48:00,455 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:48:00,467 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_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/sv-benchmarks/c/array-examples/standard_partition_ground-1.i[860,873] [2023-11-21 19:48:00,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:48:00,492 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:48:00,493 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:00 WrapperNode [2023-11-21 19:48:00,493 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:48:00,494 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:48:00,494 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:48:00,494 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:48:00,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:00" (1/1) ... [2023-11-21 19:48:00,509 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:00" (1/1) ... [2023-11-21 19:48:00,531 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 82 [2023-11-21 19:48:00,531 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:48:00,532 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:48:00,532 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:48:00,533 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:48:00,542 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:00" (1/1) ... [2023-11-21 19:48:00,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:00" (1/1) ... [2023-11-21 19:48:00,545 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:00" (1/1) ... [2023-11-21 19:48:00,545 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:00" (1/1) ... [2023-11-21 19:48:00,552 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:00" (1/1) ... [2023-11-21 19:48:00,556 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:00" (1/1) ... [2023-11-21 19:48:00,557 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:00" (1/1) ... [2023-11-21 19:48:00,558 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:00" (1/1) ... [2023-11-21 19:48:00,561 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:48:00,562 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:48:00,562 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:48:00,562 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:48:00,563 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:00" (1/1) ... [2023-11-21 19:48:00,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:48:00,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:00,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:48:00,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:48:00,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:48:00,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:48:00,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:48:00,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:48:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:48:00,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:48:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:48:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 19:48:00,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 19:48:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:48:00,746 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:48:00,749 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:48:01,014 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:48:01,095 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:48:01,096 INFO L308 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-21 19:48:01,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:48:01 BoogieIcfgContainer [2023-11-21 19:48:01,098 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:48:01,101 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:48:01,101 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:48:01,105 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:48:01,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:48:00" (1/3) ... [2023-11-21 19:48:01,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c6e74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:48:01, skipping insertion in model container [2023-11-21 19:48:01,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:00" (2/3) ... [2023-11-21 19:48:01,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c6e74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:48:01, skipping insertion in model container [2023-11-21 19:48:01,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:48:01" (3/3) ... [2023-11-21 19:48:01,108 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2023-11-21 19:48:01,128 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:48:01,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:48:01,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:48:01,214 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;@37ff9421, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:48:01,215 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:48:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 19:48:01,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 19:48:01,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:01,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:01,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:48:01,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:01,230 INFO L85 PathProgramCache]: Analyzing trace with hash 357559695, now seen corresponding path program 1 times [2023-11-21 19:48:01,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:01,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930169836] [2023-11-21 19:48:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:01,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:48:01,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:01,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930169836] [2023-11-21 19:48:01,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930169836] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:01,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:01,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:48:01,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456414750] [2023-11-21 19:48:01,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:01,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:48:01,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:01,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:48:01,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:48:01,586 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:01,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:01,662 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2023-11-21 19:48:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:48:01,665 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 19:48:01,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:01,672 INFO L225 Difference]: With dead ends: 32 [2023-11-21 19:48:01,673 INFO L226 Difference]: Without dead ends: 17 [2023-11-21 19:48:01,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:48:01,679 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:01,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:48:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-21 19:48:01,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-21 19:48:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 19:48:01,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-21 19:48:01,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 8 [2023-11-21 19:48:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:01,722 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-21 19:48:01,722 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:01,723 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-21 19:48:01,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 19:48:01,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:01,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:01,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:48:01,725 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:48:01,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:01,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1644827464, now seen corresponding path program 1 times [2023-11-21 19:48:01,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:01,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329285447] [2023-11-21 19:48:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:01,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:48:01,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:01,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329285447] [2023-11-21 19:48:01,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329285447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:48:01,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551104010] [2023-11-21 19:48:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:01,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:01,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:01,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:01,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:48:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:02,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:48:02,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:48:02,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:48:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:48:02,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551104010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:48:02,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [727967603] [2023-11-21 19:48:02,153 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-21 19:48:02,154 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:48:02,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:48:02,164 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:48:02,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:48:02,987 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-11-21 19:48:03,037 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:48:03,434 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '156#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#aa~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#cc~0#1.base_BEFORE_CALL_1| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~#cc~0#1.base_BEFORE_CALL_1|) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_1|) 0) 1) 0) (<= 2 |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_1|) (<= 2 |v_ULTIMATE.start_main_~#aa~0#1.base_BEFORE_CALL_1|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_1|))))' at error location [2023-11-21 19:48:03,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:48:03,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:48:03,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-21 19:48:03,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400963189] [2023-11-21 19:48:03,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:48:03,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:48:03,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:03,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:48:03,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-21 19:48:03,441 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:03,508 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2023-11-21 19:48:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:48:03,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-21 19:48:03,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:03,512 INFO L225 Difference]: With dead ends: 37 [2023-11-21 19:48:03,512 INFO L226 Difference]: Without dead ends: 23 [2023-11-21 19:48:03,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-21 19:48:03,513 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:03,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:48:03,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-21 19:48:03,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-21 19:48:03,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 19:48:03,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-21 19:48:03,520 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2023-11-21 19:48:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:03,521 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-21 19:48:03,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:03,521 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-21 19:48:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 19:48:03,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:03,522 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:03,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:48:03,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:03,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:48:03,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:03,741 INFO L85 PathProgramCache]: Analyzing trace with hash 729254095, now seen corresponding path program 2 times [2023-11-21 19:48:03,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:03,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604914297] [2023-11-21 19:48:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:03,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 19:48:04,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:04,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604914297] [2023-11-21 19:48:04,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604914297] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:48:04,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615250330] [2023-11-21 19:48:04,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:48:04,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:04,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:04,009 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:04,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:48:04,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-21 19:48:04,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:48:04,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 19:48:04,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 19:48:04,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:48:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 19:48:04,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615250330] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:48:04,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1948195045] [2023-11-21 19:48:04,196 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-21 19:48:04,196 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:48:04,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:48:04,197 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:48:04,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:48:04,544 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-11-21 19:48:04,572 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:48:04,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '363#(and (exists ((|v_ULTIMATE.start_main_~#aa~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#cc~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_2| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#cc~0#1.base_BEFORE_CALL_2|) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_2|) (<= 2 |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_2|) (<= 2 |v_ULTIMATE.start_main_~#aa~0#1.base_BEFORE_CALL_2|) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_2|) 0) 1) 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-21 19:48:04,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:48:04,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:48:04,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-21 19:48:04,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428767353] [2023-11-21 19:48:04,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:48:04,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 19:48:04,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:04,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 19:48:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-11-21 19:48:04,925 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:05,014 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2023-11-21 19:48:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 19:48:05,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-21 19:48:05,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:05,016 INFO L225 Difference]: With dead ends: 52 [2023-11-21 19:48:05,016 INFO L226 Difference]: Without dead ends: 35 [2023-11-21 19:48:05,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-11-21 19:48:05,023 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:05,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:48:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-21 19:48:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-21 19:48:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 19:48:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-11-21 19:48:05,038 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 16 [2023-11-21 19:48:05,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:05,041 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-11-21 19:48:05,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-11-21 19:48:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 19:48:05,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:05,043 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:05,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:48:05,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:05,265 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:48:05,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:05,265 INFO L85 PathProgramCache]: Analyzing trace with hash -326158929, now seen corresponding path program 3 times [2023-11-21 19:48:05,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:05,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420394527] [2023-11-21 19:48:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:05,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 19:48:05,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:05,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420394527] [2023-11-21 19:48:05,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420394527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:48:05,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494456594] [2023-11-21 19:48:05,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 19:48:05,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:05,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:05,645 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:05,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:48:05,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 19:48:05,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:48:05,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 19:48:05,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 19:48:05,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:48:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 19:48:06,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494456594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:48:06,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1472444008] [2023-11-21 19:48:06,092 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-21 19:48:06,093 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:48:06,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:48:06,093 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:48:06,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:48:06,391 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-11-21 19:48:06,426 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:48:06,789 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '708#(and (exists ((|v_ULTIMATE.start_main_~#cc~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#aa~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_3| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_3|) (<= 2 |v_ULTIMATE.start_main_~#aa~0#1.base_BEFORE_CALL_3|) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_3|) 0) 1) 0) (<= 2 |v_ULTIMATE.start_main_~#cc~0#1.base_BEFORE_CALL_3|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_3|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-21 19:48:06,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:48:06,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:48:06,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-21 19:48:06,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755624556] [2023-11-21 19:48:06,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:48:06,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-21 19:48:06,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:06,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-21 19:48:06,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2023-11-21 19:48:06,792 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:06,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:06,962 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2023-11-21 19:48:06,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-21 19:48:06,963 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-21 19:48:06,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:06,964 INFO L225 Difference]: With dead ends: 82 [2023-11-21 19:48:06,964 INFO L226 Difference]: Without dead ends: 59 [2023-11-21 19:48:06,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2023-11-21 19:48:06,966 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:06,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:48:06,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-21 19:48:06,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-21 19:48:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 19:48:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2023-11-21 19:48:06,977 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 28 [2023-11-21 19:48:06,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:06,977 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2023-11-21 19:48:06,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:06,978 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2023-11-21 19:48:06,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-21 19:48:06,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:06,980 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:07,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:48:07,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:07,196 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:48:07,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:07,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1788823697, now seen corresponding path program 4 times [2023-11-21 19:48:07,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:07,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132187474] [2023-11-21 19:48:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:07,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-21 19:48:08,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:08,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132187474] [2023-11-21 19:48:08,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132187474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:48:08,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138660088] [2023-11-21 19:48:08,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 19:48:08,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:08,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:08,365 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:08,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:48:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:08,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-21 19:48:08,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-21 19:48:08,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:48:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-21 19:48:09,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138660088] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:48:09,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996650595] [2023-11-21 19:48:09,470 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-21 19:48:09,470 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:48:09,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:48:09,471 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:48:09,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:48:09,796 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-11-21 19:48:09,819 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:48:10,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1329#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#cc~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#aa~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_4| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~#cc~0#1.base_BEFORE_CALL_4|) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_4|) 0) 1) 0) (<= 2 |v_ULTIMATE.start_main_~#aa~0#1.base_BEFORE_CALL_4|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_4|) (<= 2 |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_4|))))' at error location [2023-11-21 19:48:10,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:48:10,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:48:10,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-21 19:48:10,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448031536] [2023-11-21 19:48:10,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:48:10,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-21 19:48:10,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:10,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-21 19:48:10,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=1883, Unknown=0, NotChecked=0, Total=3080 [2023-11-21 19:48:10,309 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:10,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:10,655 INFO L93 Difference]: Finished difference Result 142 states and 197 transitions. [2023-11-21 19:48:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-21 19:48:10,656 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-21 19:48:10,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:10,658 INFO L225 Difference]: With dead ends: 142 [2023-11-21 19:48:10,658 INFO L226 Difference]: Without dead ends: 107 [2023-11-21 19:48:10,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1197, Invalid=1883, Unknown=0, NotChecked=0, Total=3080 [2023-11-21 19:48:10,661 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:10,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:48:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-21 19:48:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-11-21 19:48:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 103 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 19:48:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2023-11-21 19:48:10,675 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 52 [2023-11-21 19:48:10,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:10,675 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2023-11-21 19:48:10,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:10,676 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2023-11-21 19:48:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-21 19:48:10,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:10,680 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:10,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 19:48:10,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:10,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:48:10,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:10,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2008308463, now seen corresponding path program 5 times [2023-11-21 19:48:10,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:10,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631088674] [2023-11-21 19:48:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:10,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-11-21 19:48:14,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:14,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631088674] [2023-11-21 19:48:14,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631088674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:48:14,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841291958] [2023-11-21 19:48:14,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:48:14,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:14,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:14,985 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:15,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f3a769f-9d9c-4055-bd76-f9c7cbf3bee3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process