./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3627a732530e36fdf7a132fca7d3f33785550e6f2e2a95fdbae864743bbd37d1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:03:46,709 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:03:46,782 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:03:46,788 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:03:46,789 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:03:46,817 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:03:46,817 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:03:46,818 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:03:46,819 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:03:46,820 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:03:46,820 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:03:46,821 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:03:46,822 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:03:46,822 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:03:46,823 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:03:46,823 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:03:46,824 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:03:46,824 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:03:46,825 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:03:46,826 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:03:46,826 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:03:46,827 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:03:46,828 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:03:46,828 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:03:46,829 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:03:46,829 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:03:46,829 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:03:46,830 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:03:46,830 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:03:46,831 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:03:46,831 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:03:46,832 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:03:46,832 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:03:46,832 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:03:46,833 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:03:46,833 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:03:46,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:03:46,834 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:03:46,835 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:03:46,835 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:03:46,836 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:03:46,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:03:46,837 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:03:46,837 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:03:46,837 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:03:46,838 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_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3627a732530e36fdf7a132fca7d3f33785550e6f2e2a95fdbae864743bbd37d1 [2023-11-19 05:03:47,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:03:47,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:03:47,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:03:47,199 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:03:47,200 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:03:47,202 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2023-11-19 05:03:50,458 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:03:50,764 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:03:50,765 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2023-11-19 05:03:50,774 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/data/6f862bc22/9098343b53354f188a764b278f9d39d7/FLAGd29fd0d2d [2023-11-19 05:03:50,805 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/data/6f862bc22/9098343b53354f188a764b278f9d39d7 [2023-11-19 05:03:50,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:03:50,818 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:03:50,822 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:03:50,822 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:03:50,829 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:03:50,830 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:03:50" (1/1) ... [2023-11-19 05:03:50,831 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd58a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:50, skipping insertion in model container [2023-11-19 05:03:50,832 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:03:50" (1/1) ... [2023-11-19 05:03:50,866 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:03:51,110 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_337b05cd-8219-4541-bff7-0569b3df6ba9/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c[327,340] [2023-11-19 05:03:51,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:03:51,136 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:03:51,150 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_337b05cd-8219-4541-bff7-0569b3df6ba9/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c[327,340] [2023-11-19 05:03:51,154 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:03:51,172 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:03:51,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:51 WrapperNode [2023-11-19 05:03:51,173 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:03:51,175 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:03:51,175 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:03:51,175 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:03:51,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:51" (1/1) ... [2023-11-19 05:03:51,196 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:51" (1/1) ... [2023-11-19 05:03:51,221 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2023-11-19 05:03:51,222 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:03:51,224 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:03:51,225 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:03:51,225 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:03:51,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:51" (1/1) ... [2023-11-19 05:03:51,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:51" (1/1) ... [2023-11-19 05:03:51,240 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:51" (1/1) ... [2023-11-19 05:03:51,240 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:51" (1/1) ... [2023-11-19 05:03:51,249 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:51" (1/1) ... [2023-11-19 05:03:51,253 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:51" (1/1) ... [2023-11-19 05:03:51,255 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:51" (1/1) ... [2023-11-19 05:03:51,256 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:51" (1/1) ... [2023-11-19 05:03:51,258 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:03:51,259 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:03:51,259 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:03:51,259 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:03:51,260 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:51" (1/1) ... [2023-11-19 05:03:51,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:03:51,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:03:51,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:03:51,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:03:51,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:03:51,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:03:51,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:03:51,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:03:51,409 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:03:51,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:03:51,582 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:03:51,627 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:03:51,627 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:03:51,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:03:51 BoogieIcfgContainer [2023-11-19 05:03:51,632 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:03:51,634 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:03:51,635 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:03:51,638 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:03:51,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:03:50" (1/3) ... [2023-11-19 05:03:51,639 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2704a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:03:51, skipping insertion in model container [2023-11-19 05:03:51,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:51" (2/3) ... [2023-11-19 05:03:51,640 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2704a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:03:51, skipping insertion in model container [2023-11-19 05:03:51,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:03:51" (3/3) ... [2023-11-19 05:03:51,641 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2023-11-19 05:03:51,661 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:03:51,661 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:03:51,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:03:51,716 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;@4cd1873e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:03:51,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:03:51,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:03:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 05:03:51,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:51,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 05:03:51,731 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:51,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:51,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1850503, now seen corresponding path program 1 times [2023-11-19 05:03:51,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:51,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484260298] [2023-11-19 05:03:51,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:51,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:03:52,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:52,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484260298] [2023-11-19 05:03:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484260298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:03:52,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:03:52,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:03:52,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533306489] [2023-11-19 05:03:52,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:03:52,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:03:52,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:52,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:03:52,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:03:52,171 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:03:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:52,224 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2023-11-19 05:03:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:03:52,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2023-11-19 05:03:52,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:52,238 INFO L225 Difference]: With dead ends: 13 [2023-11-19 05:03:52,238 INFO L226 Difference]: Without dead ends: 6 [2023-11-19 05:03:52,242 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 [2023-11-19 05:03:52,249 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:52,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:03:52,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2023-11-19 05:03:52,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2023-11-19 05:03:52,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:03:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2023-11-19 05:03:52,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2023-11-19 05:03:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:52,297 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2023-11-19 05:03:52,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:03:52,297 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2023-11-19 05:03:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 05:03:52,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:52,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 05:03:52,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:03:52,301 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:52,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:52,302 INFO L85 PathProgramCache]: Analyzing trace with hash 56695734, now seen corresponding path program 1 times [2023-11-19 05:03:52,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:52,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421161352] [2023-11-19 05:03:52,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:52,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:03:52,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:52,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421161352] [2023-11-19 05:03:52,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421161352] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:03:52,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363093054] [2023-11-19 05:03:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:52,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:03:52,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:03:52,562 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:03:52,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:03:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:52,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:03:52,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:03:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:03:52,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:03:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:03:52,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363093054] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:03:52,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1620199096] [2023-11-19 05:03:52,738 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-11-19 05:03:52,738 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:03:52,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:03:52,751 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:03:52,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:03:53,045 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:03:53,129 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '67#(and (= (mod (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 3) 0) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 6 (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-19 05:03:53,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:03:53,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:03:53,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 05:03:53,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082502062] [2023-11-19 05:03:53,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:03:53,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:03:53,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:53,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:03:53,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:03:53,136 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:03:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:53,182 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2023-11-19 05:03:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:03:53,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-19 05:03:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:53,184 INFO L225 Difference]: With dead ends: 12 [2023-11-19 05:03:53,184 INFO L226 Difference]: Without dead ends: 9 [2023-11-19 05:03:53,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:03:53,187 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:53,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:03:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-19 05:03:53,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-11-19 05:03:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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) [2023-11-19 05:03:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2023-11-19 05:03:53,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2023-11-19 05:03:53,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:53,194 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2023-11-19 05:03:53,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:03:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2023-11-19 05:03:53,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 05:03:53,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:53,196 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2023-11-19 05:03:53,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:03:53,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:03:53,412 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:53,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:53,413 INFO L85 PathProgramCache]: Analyzing trace with hash 435294279, now seen corresponding path program 2 times [2023-11-19 05:03:53,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:53,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670832442] [2023-11-19 05:03:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:53,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:03:53,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:53,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670832442] [2023-11-19 05:03:53,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670832442] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:03:53,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070938918] [2023-11-19 05:03:53,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:03:53,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:03:53,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:03:53,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:03:53,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:03:53,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 05:03:53,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:03:53,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 05:03:53,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:03:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:03:53,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:03:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:03:53,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070938918] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:03:53,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1660815658] [2023-11-19 05:03:53,902 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-11-19 05:03:53,902 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:03:53,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:03:53,903 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:03:53,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:03:54,088 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:03:54,200 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '158#(and (= (mod (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 3) 0) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 6 (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-19 05:03:54,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:03:54,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:03:54,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 05:03:54,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764842044] [2023-11-19 05:03:54,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:03:54,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 05:03:54,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:54,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 05:03:54,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-19 05:03:54,208 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:03:54,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:54,270 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2023-11-19 05:03:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:03:54,271 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 05:03:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:54,272 INFO L225 Difference]: With dead ends: 14 [2023-11-19 05:03:54,272 INFO L226 Difference]: Without dead ends: 11 [2023-11-19 05:03:54,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-19 05:03:54,278 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:54,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:03:54,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-19 05:03:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-19 05:03:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:03:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2023-11-19 05:03:54,284 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2023-11-19 05:03:54,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:54,285 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2023-11-19 05:03:54,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:03:54,286 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2023-11-19 05:03:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 05:03:54,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:54,286 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2023-11-19 05:03:54,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:03:54,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:03:54,512 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:54,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:54,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1684538919, now seen corresponding path program 3 times [2023-11-19 05:03:54,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:54,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981742534] [2023-11-19 05:03:54,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:54,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:03:55,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:55,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981742534] [2023-11-19 05:03:55,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981742534] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:03:55,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429369945] [2023-11-19 05:03:55,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:03:55,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:03:55,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:03:55,103 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:03:55,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:03:55,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:03:55,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:03:55,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 05:03:55,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:03:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:03:55,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:03:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:03:55,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429369945] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:03:55,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1845020238] [2023-11-19 05:03:55,902 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-11-19 05:03:55,902 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:03:55,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:03:55,902 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:03:55,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:03:56,028 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:03:56,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '274#(and (= (mod (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 3) 0) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 6 (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-19 05:03:56,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:03:56,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:03:56,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-11-19 05:03:56,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55255212] [2023-11-19 05:03:56,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:03:56,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 05:03:56,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:56,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 05:03:56,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-11-19 05:03:56,188 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 20 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:04:06,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:06,044 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2023-11-19 05:04:06,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 05:04:06,045 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 05:04:06,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:06,046 INFO L225 Difference]: With dead ends: 29 [2023-11-19 05:04:06,046 INFO L226 Difference]: Without dead ends: 19 [2023-11-19 05:04:06,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2023-11-19 05:04:06,049 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:06,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 21 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 05:04:06,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-19 05:04:06,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-19 05:04:06,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 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) [2023-11-19 05:04:06,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2023-11-19 05:04:06,064 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2023-11-19 05:04:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:06,064 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2023-11-19 05:04:06,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:04:06,065 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2023-11-19 05:04:06,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 05:04:06,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:06,066 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1] [2023-11-19 05:04:06,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:06,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:06,279 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:06,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:06,280 INFO L85 PathProgramCache]: Analyzing trace with hash 946875815, now seen corresponding path program 4 times [2023-11-19 05:04:06,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:06,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395456948] [2023-11-19 05:04:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:06,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 05:04:06,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:06,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395456948] [2023-11-19 05:04:06,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395456948] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:06,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480266584] [2023-11-19 05:04:06,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:04:06,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:06,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:06,558 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:06,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:04:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:06,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 05:04:06,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 05:04:06,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:04:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 05:04:06,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480266584] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:04:06,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [436144184] [2023-11-19 05:04:06,858 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-11-19 05:04:06,858 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:04:06,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:04:06,859 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:04:06,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:04:06,954 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:04:07,057 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '502#(and (= (mod (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 3) 0) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 6 (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-19 05:04:07,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:04:07,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:04:07,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-19 05:04:07,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040347243] [2023-11-19 05:04:07,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:04:07,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 05:04:07,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:07,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 05:04:07,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:04:07,060 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:04:07,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:07,103 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2023-11-19 05:04:07,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:04:07,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 05:04:07,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:07,104 INFO L225 Difference]: With dead ends: 19 [2023-11-19 05:04:07,105 INFO L226 Difference]: Without dead ends: 0 [2023-11-19 05:04:07,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:04:07,106 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:07,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:04:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-19 05:04:07,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-19 05:04:07,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:04:07,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 05:04:07,108 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2023-11-19 05:04:07,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:07,108 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 05:04:07,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:04:07,109 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-19 05:04:07,109 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-19 05:04:07,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 05:04:07,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:07,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:07,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-19 05:04:07,449 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-19 05:04:07,450 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-19 05:04:07,450 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2023-11-19 05:04:07,450 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2023-11-19 05:04:07,450 INFO L895 garLoopResultBuilder]: At program point L16-2(lines 16 19) the Hoare annotation is: (let ((.cse0 (+ (* 2 |ULTIMATE.start_main_~y~0#1|) 1)) (.cse1 (* 715827883 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (* |ULTIMATE.start_main_~y~0#1| 178956971)) (.cse3 (+ |ULTIMATE.start_main_~y~0#1| 1))) (or (and (<= .cse0 (* (div (+ .cse1 357913936) 1073741824) 3)) (<= |ULTIMATE.start_main_~y~0#1| 16) (= |ULTIMATE.start_main_~x~0#1| 4)) (and (= 2 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 4) (<= .cse0 (* 3 (div (+ 89478484 .cse2) 268435456)))) (and (= 5 |ULTIMATE.start_main_~x~0#1|) (<= .cse3 (* 3 (div (+ .cse1 715827872) 2147483648))) (<= |ULTIMATE.start_main_~y~0#1| 32)) (and (= 3 |ULTIMATE.start_main_~x~0#1|) (<= .cse3 (* (div (+ .cse2 178956968) 536870912) 3)) (<= |ULTIMATE.start_main_~y~0#1| 8)) (and (<= |ULTIMATE.start_main_~y~0#1| 2) (= |ULTIMATE.start_main_~x~0#1| 1) (<= .cse3 (* (div (+ 44739242 (* 44739243 |ULTIMATE.start_main_~y~0#1|)) 134217728) 3))) (and (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0)) (let ((.cse4 (div |ULTIMATE.start_main_~y~0#1| 2))) (and (= (mod |ULTIMATE.start_main_~y~0#1| 2) 0) (<= (+ 1 .cse4) (* (div (+ (* 715827883 .cse4) 715827872) 2147483648) 3)) (<= .cse4 32) (= 6 |ULTIMATE.start_main_~x~0#1|))))) [2023-11-19 05:04:07,451 INFO L899 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2023-11-19 05:04:07,451 INFO L899 garLoopResultBuilder]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2023-11-19 05:04:07,454 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1] [2023-11-19 05:04:07,456 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 05:04:07,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 05:04:07 BoogieIcfgContainer [2023-11-19 05:04:07,476 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 05:04:07,477 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 05:04:07,477 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 05:04:07,477 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 05:04:07,478 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:03:51" (3/4) ... [2023-11-19 05:04:07,480 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-19 05:04:07,487 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2023-11-19 05:04:07,488 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2023-11-19 05:04:07,488 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-19 05:04:07,488 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-19 05:04:07,590 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/witness.graphml [2023-11-19 05:04:07,590 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/witness.yml [2023-11-19 05:04:07,591 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 05:04:07,592 INFO L158 Benchmark]: Toolchain (without parser) took 16774.02ms. Allocated memory was 125.8MB in the beginning and 188.7MB in the end (delta: 62.9MB). Free memory was 80.8MB in the beginning and 113.0MB in the end (delta: -32.2MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. [2023-11-19 05:04:07,592 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 125.8MB. Free memory is still 72.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:04:07,592 INFO L158 Benchmark]: CACSL2BoogieTranslator took 351.95ms. Allocated memory is still 125.8MB. Free memory was 80.8MB in the beginning and 70.5MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 05:04:07,593 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.41ms. Allocated memory is still 125.8MB. Free memory was 70.5MB in the beginning and 69.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 05:04:07,593 INFO L158 Benchmark]: Boogie Preprocessor took 33.79ms. Allocated memory is still 125.8MB. Free memory was 69.1MB in the beginning and 68.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:04:07,594 INFO L158 Benchmark]: RCFGBuilder took 373.22ms. Allocated memory was 125.8MB in the beginning and 157.3MB in the end (delta: 31.5MB). Free memory was 68.0MB in the beginning and 127.9MB in the end (delta: -59.9MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. [2023-11-19 05:04:07,595 INFO L158 Benchmark]: TraceAbstraction took 15842.14ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 127.0MB in the beginning and 117.2MB in the end (delta: 9.8MB). Peak memory consumption was 41.2MB. Max. memory is 16.1GB. [2023-11-19 05:04:07,595 INFO L158 Benchmark]: Witness Printer took 113.88ms. Allocated memory is still 188.7MB. Free memory was 117.2MB in the beginning and 113.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-19 05:04:07,598 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 125.8MB. Free memory is still 72.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 351.95ms. Allocated memory is still 125.8MB. Free memory was 80.8MB in the beginning and 70.5MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.41ms. Allocated memory is still 125.8MB. Free memory was 70.5MB in the beginning and 69.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.79ms. Allocated memory is still 125.8MB. Free memory was 69.1MB in the beginning and 68.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 373.22ms. Allocated memory was 125.8MB in the beginning and 157.3MB in the end (delta: 31.5MB). Free memory was 68.0MB in the beginning and 127.9MB in the end (delta: -59.9MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. * TraceAbstraction took 15842.14ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 127.0MB in the beginning and 117.2MB in the end (delta: 9.8MB). Peak memory consumption was 41.2MB. Max. memory is 16.1GB. * Witness Printer took 113.88ms. Allocated memory is still 188.7MB. Free memory was 117.2MB in the beginning and 113.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 15.8s, OverallIterations: 5, TraceHistogramMax: 14, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 10.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 34 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 34 mSDsluCounter, 51 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 222 IncrementalHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 9 mSDtfsCounter, 222 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 9.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=4, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 8 NumberOfFragments, 143 HoareAnnotationTreeSize, 1 FomulaSimplifications, 22 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 114 ConstructedInterpolants, 1 QuantifiedInterpolants, 594 SizeOfPredicates, 3 NumberOfNonLiveVariables, 257 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 252/411 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (((((((((((2 * y) + 1) <= ((((715827883 * y) + 357913936) / 1073741824) * 3)) && (y <= 16)) && (x == 4)) || (((2 == x) && (y <= 4)) && (((2 * y) + 1) <= (3 * ((89478484 + (y * 178956971)) / 268435456))))) || (((5 == x) && ((y + 1) <= (3 * (((715827883 * y) + 715827872) / 2147483648)))) && (y <= 32))) || (((3 == x) && ((y + 1) <= ((((y * 178956971) + 178956968) / 536870912) * 3))) && (y <= 8))) || (((y <= 2) && (x == 1)) && ((y + 1) <= (((44739242 + (44739243 * y)) / 134217728) * 3)))) || ((y == 1) && (x == 0))) || (((((y % 2) == 0) && ((1 + (y / 2)) <= ((((715827883 * (y / 2)) + 715827872) / 2147483648) * 3))) && ((y / 2) <= 32)) && (6 == x))) RESULT: Ultimate proved your program to be correct! [2023-11-19 05:04:07,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337b05cd-8219-4541-bff7-0569b3df6ba9/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE