./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark01_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/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_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark01_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b503f9744330c40db60063d7713649b00b515fae7df517a0a6da071e866822e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:52:06,954 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:52:07,115 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-21 19:52:07,123 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:52:07,124 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:52:07,173 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:52:07,174 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:52:07,175 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:52:07,176 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:52:07,183 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:52:07,183 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:52:07,184 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:52:07,185 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:52:07,187 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:52:07,188 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:52:07,188 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:52:07,189 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:52:07,189 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:52:07,190 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:52:07,191 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:52:07,191 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:52:07,192 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:52:07,194 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:52:07,195 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:52:07,195 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:52:07,196 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:52:07,197 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:52:07,197 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:52:07,198 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:52:07,199 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:52:07,201 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:52:07,201 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-21 19:52:07,202 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 19:52:07,202 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:52:07,202 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:52:07,203 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:52:07,203 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:52:07,203 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:52:07,204 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:52:07,204 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:52:07,205 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:52:07,205 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:52:07,206 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:52:07,206 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:52:07,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:52:07,208 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:52:07,208 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:52:07,208 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:52:07,209 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:52:07,209 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_7ba6b916-6ed5-424c-bc8d-17419b2d0865/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b503f9744330c40db60063d7713649b00b515fae7df517a0a6da071e866822e [2023-11-21 19:52:07,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:52:07,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:52:07,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:52:07,624 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:52:07,625 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:52:07,627 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/loop-zilu/benchmark01_conjunctive.i [2023-11-21 19:52:11,422 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:52:11,694 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:52:11,695 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/sv-benchmarks/c/loop-zilu/benchmark01_conjunctive.i [2023-11-21 19:52:11,705 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/data/6969536ce/19c5d4b84c2e4faf999e6fae9aa5988d/FLAG70cb2a1e6 [2023-11-21 19:52:11,732 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/data/6969536ce/19c5d4b84c2e4faf999e6fae9aa5988d [2023-11-21 19:52:11,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:52:11,742 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:52:11,746 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:52:11,747 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:52:11,754 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:52:11,755 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:52:11" (1/1) ... [2023-11-21 19:52:11,757 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ff78831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:52:11, skipping insertion in model container [2023-11-21 19:52:11,757 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:52:11" (1/1) ... [2023-11-21 19:52:11,790 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:52:12,057 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:52:12,073 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:52:12,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:52:12,126 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:52:12,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:52:12 WrapperNode [2023-11-21 19:52:12,126 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:52:12,128 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:52:12,128 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:52:12,129 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:52:12,139 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:52:12" (1/1) ... [2023-11-21 19:52:12,150 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:52:12" (1/1) ... [2023-11-21 19:52:12,177 INFO L138 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 39 [2023-11-21 19:52:12,177 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:52:12,178 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:52:12,179 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:52:12,179 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:52:12,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:52:12" (1/1) ... [2023-11-21 19:52:12,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:52:12" (1/1) ... [2023-11-21 19:52:12,193 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:52:12" (1/1) ... [2023-11-21 19:52:12,194 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:52:12" (1/1) ... [2023-11-21 19:52:12,198 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:52:12" (1/1) ... [2023-11-21 19:52:12,202 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:52:12" (1/1) ... [2023-11-21 19:52:12,204 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:52:12" (1/1) ... [2023-11-21 19:52:12,205 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:52:12" (1/1) ... [2023-11-21 19:52:12,207 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:52:12,209 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:52:12,209 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:52:12,209 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:52:12,210 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:52:12" (1/1) ... [2023-11-21 19:52:12,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:52:12,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:52:12,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:52:12,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:52:12,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:52:12,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:52:12,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:52:12,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:52:12,379 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:52:12,383 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:52:12,546 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:52:12,606 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:52:12,606 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 19:52:12,608 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:52:12 BoogieIcfgContainer [2023-11-21 19:52:12,608 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:52:12,612 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:52:12,612 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:52:12,617 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:52:12,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:52:11" (1/3) ... [2023-11-21 19:52:12,619 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2f0caa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:52:12, skipping insertion in model container [2023-11-21 19:52:12,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:52:12" (2/3) ... [2023-11-21 19:52:12,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2f0caa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:52:12, skipping insertion in model container [2023-11-21 19:52:12,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:52:12" (3/3) ... [2023-11-21 19:52:12,622 INFO L112 eAbstractionObserver]: Analyzing ICFG benchmark01_conjunctive.i [2023-11-21 19:52:12,649 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:52:12,650 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 19:52:12,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:52:12,730 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;@4cbefc0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:52:12,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 19:52:12,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 8 states have (on average 1.625) internal successors, (13), 10 states have internal predecessors, (13), 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) [2023-11-21 19:52:12,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-21 19:52:12,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:52:12,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 19:52:12,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-21 19:52:12,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:52:12,770 INFO L85 PathProgramCache]: Analyzing trace with hash 68561168, now seen corresponding path program 1 times [2023-11-21 19:52:12,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:52:12,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943031878] [2023-11-21 19:52:12,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:52:12,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:52:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:52:13,058 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 19:52:13,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:52:13,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943031878] [2023-11-21 19:52:13,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943031878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:52:13,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:52:13,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:52:13,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913855117] [2023-11-21 19:52:13,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:52:13,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:52:13,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:52:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:52:13,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:52:13,113 INFO L87 Difference]: Start difference. First operand has 11 states, 8 states have (on average 1.625) internal successors, (13), 10 states have internal predecessors, (13), 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, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-11-21 19:52:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:52:13,162 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2023-11-21 19:52:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:52:13,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 [2023-11-21 19:52:13,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:52:13,176 INFO L225 Difference]: With dead ends: 15 [2023-11-21 19:52:13,177 INFO L226 Difference]: Without dead ends: 7 [2023-11-21 19:52:13,181 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 19:52:13,199 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:52:13,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 5 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:52:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2023-11-21 19:52:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2023-11-21 19:52:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:52:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2023-11-21 19:52:13,238 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2023-11-21 19:52:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:52:13,239 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2023-11-21 19:52:13,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-11-21 19:52:13,240 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2023-11-21 19:52:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 19:52:13,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:52:13,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 19:52:13,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:52:13,242 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-21 19:52:13,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:52:13,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2125396259, now seen corresponding path program 1 times [2023-11-21 19:52:13,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:52:13,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626571787] [2023-11-21 19:52:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:52:13,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:52:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:52:13,323 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 19:52:13,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:52:13,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626571787] [2023-11-21 19:52:13,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626571787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:52:13,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:52:13,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:52:13,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611722461] [2023-11-21 19:52:13,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:52:13,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:52:13,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:52:13,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:52:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:52:13,329 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2023-11-21 19:52:13,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:52:13,348 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2023-11-21 19:52:13,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:52:13,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) Word has length 6 [2023-11-21 19:52:13,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:52:13,350 INFO L225 Difference]: With dead ends: 12 [2023-11-21 19:52:13,351 INFO L226 Difference]: Without dead ends: 11 [2023-11-21 19:52:13,351 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 19:52:13,354 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 2 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 [2023-11-21 19:52:13,355 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] [2023-11-21 19:52:13,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-21 19:52:13,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-21 19:52:13,361 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) [2023-11-21 19:52:13,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2023-11-21 19:52:13,362 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2023-11-21 19:52:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:52:13,362 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2023-11-21 19:52:13,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2023-11-21 19:52:13,395 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2023-11-21 19:52:13,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 19:52:13,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:52:13,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2023-11-21 19:52:13,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:52:13,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-21 19:52:13,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:52:13,399 INFO L85 PathProgramCache]: Analyzing trace with hash 780893642, now seen corresponding path program 1 times [2023-11-21 19:52:13,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:52:13,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778340325] [2023-11-21 19:52:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:52:13,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:52:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:52:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:52:13,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:52:13,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778340325] [2023-11-21 19:52:13,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778340325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:52:13,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642224974] [2023-11-21 19:52:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:52:13,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:52:13,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:52:13,574 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:52:13,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:52:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:52:13,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 19:52:13,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:52:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:52:13,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:52:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:52:13,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642224974] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:52:13,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714255499] [2023-11-21 19:52:13,922 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-21 19:52:13,922 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:52:13,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:52:13,935 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:52:13,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:52:14,542 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:52:14,773 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '133#(and (<= 1 |#StackHeapBarrier|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-11-21 19:52:14,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:52:14,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:52:14,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-21 19:52:14,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518468234] [2023-11-21 19:52:14,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:52:14,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:52:14,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:52:14,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:52:14,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-21 19:52:14,778 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:52:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:52:14,845 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2023-11-21 19:52:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:52:14,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-21 19:52:14,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:52:14,847 INFO L225 Difference]: With dead ends: 24 [2023-11-21 19:52:14,847 INFO L226 Difference]: Without dead ends: 23 [2023-11-21 19:52:14,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-21 19:52:14,850 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:52:14,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:52:14,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-21 19:52:14,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-21 19:52:14,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 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) [2023-11-21 19:52:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2023-11-21 19:52:14,863 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 10 [2023-11-21 19:52:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:52:14,864 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2023-11-21 19:52:14,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:52:14,866 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2023-11-21 19:52:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 19:52:14,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:52:14,868 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1] [2023-11-21 19:52:14,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:52:15,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:52:15,085 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-21 19:52:15,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:52:15,086 INFO L85 PathProgramCache]: Analyzing trace with hash -534509889, now seen corresponding path program 2 times [2023-11-21 19:52:15,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:52:15,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561483674] [2023-11-21 19:52:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:52:15,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:52:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:52:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:52:15,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:52:15,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561483674] [2023-11-21 19:52:15,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561483674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:52:15,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619894917] [2023-11-21 19:52:15,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:52:15,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:52:15,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:52:15,515 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:52:15,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:52:15,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-21 19:52:15,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:52:15,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 19:52:15,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:52:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:52:15,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:52:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:52:15,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619894917] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:52:15,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1339352399] [2023-11-21 19:52:15,946 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-21 19:52:15,946 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:52:15,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:52:15,947 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:52:15,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:52:16,278 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:52:16,487 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '340#(and (<= 1 |#StackHeapBarrier|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-11-21 19:52:16,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:52:16,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:52:16,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-21 19:52:16,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537853898] [2023-11-21 19:52:16,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:52:16,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 19:52:16,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:52:16,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 19:52:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2023-11-21 19:52:16,495 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 17 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 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) [2023-11-21 19:52:16,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:52:16,605 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2023-11-21 19:52:16,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 19:52:16,606 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 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 22 [2023-11-21 19:52:16,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:52:16,610 INFO L225 Difference]: With dead ends: 48 [2023-11-21 19:52:16,610 INFO L226 Difference]: Without dead ends: 47 [2023-11-21 19:52:16,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2023-11-21 19:52:16,616 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:52:16,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:52:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-21 19:52:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-21 19:52:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 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) [2023-11-21 19:52:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2023-11-21 19:52:16,640 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 22 [2023-11-21 19:52:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:52:16,641 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2023-11-21 19:52:16,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 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) [2023-11-21 19:52:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2023-11-21 19:52:16,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 19:52:16,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:52:16,645 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 1, 1, 1] [2023-11-21 19:52:16,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:52:16,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:52:16,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-21 19:52:16,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:52:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1632633385, now seen corresponding path program 3 times [2023-11-21 19:52:16,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:52:16,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325420576] [2023-11-21 19:52:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:52:16,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:52:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:52:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:52:17,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:52:17,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325420576] [2023-11-21 19:52:17,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325420576] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:52:17,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147482994] [2023-11-21 19:52:17,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 19:52:17,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:52:17,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:52:17,590 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:52:17,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:52:17,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 19:52:17,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:52:17,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-21 19:52:17,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:52:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:52:18,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:52:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:52:18,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147482994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:52:18,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1040033264] [2023-11-21 19:52:18,778 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-21 19:52:18,779 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:52:18,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:52:18,789 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:52:18,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:52:19,005 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:52:19,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '769#(and (<= 1 |#StackHeapBarrier|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-11-21 19:52:19,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:52:19,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:52:19,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-11-21 19:52:19,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569640300] [2023-11-21 19:52:19,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:52:19,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-21 19:52:19,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:52:19,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-21 19:52:19,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=1035, Unknown=0, NotChecked=0, Total=1560 [2023-11-21 19:52:19,309 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 35 states, 34 states have (on average 4.0) internal successors, (136), 35 states have internal predecessors, (136), 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) [2023-11-21 19:52:19,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:52:19,472 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2023-11-21 19:52:19,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-21 19:52:19,474 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.0) internal successors, (136), 35 states have internal predecessors, (136), 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 46 [2023-11-21 19:52:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:52:19,476 INFO L225 Difference]: With dead ends: 96 [2023-11-21 19:52:19,476 INFO L226 Difference]: Without dead ends: 95 [2023-11-21 19:52:19,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=560, Invalid=1080, Unknown=0, NotChecked=0, Total=1640 [2023-11-21 19:52:19,479 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:52:19,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:52:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-21 19:52:19,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-11-21 19:52:19,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 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) [2023-11-21 19:52:19,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2023-11-21 19:52:19,495 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 46 [2023-11-21 19:52:19,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:52:19,496 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2023-11-21 19:52:19,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.0) internal successors, (136), 35 states have internal predecessors, (136), 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) [2023-11-21 19:52:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2023-11-21 19:52:19,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-21 19:52:19,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:52:19,501 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 1, 1, 1] [2023-11-21 19:52:19,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:52:19,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:52:19,722 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-21 19:52:19,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:52:19,723 INFO L85 PathProgramCache]: Analyzing trace with hash 18783997, now seen corresponding path program 4 times [2023-11-21 19:52:19,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:52:19,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012662015] [2023-11-21 19:52:19,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:52:19,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:52:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:52:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 1012 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:52:21,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:52:21,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012662015] [2023-11-21 19:52:21,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012662015] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:52:21,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980678900] [2023-11-21 19:52:21,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 19:52:21,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:52:21,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:52:21,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:52:21,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:52:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:52:21,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-21 19:52:21,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:52:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 1012 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:52:23,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:52:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 1012 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:52:24,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980678900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:52:24,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1572762747] [2023-11-21 19:52:24,594 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-21 19:52:24,595 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:52:24,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:52:24,595 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:52:24,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:52:24,807 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:52:25,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1642#(and (<= 1 |#StackHeapBarrier|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-11-21 19:52:25,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:52:25,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:52:25,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2023-11-21 19:52:25,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676616301] [2023-11-21 19:52:25,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:52:25,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-21 19:52:25,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:52:25,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-21 19:52:25,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1941, Invalid=3759, Unknown=0, NotChecked=0, Total=5700 [2023-11-21 19:52:25,135 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 71 states, 70 states have (on average 4.0) internal successors, (280), 71 states have internal predecessors, (280), 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) [2023-11-21 19:52:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:52:25,341 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2023-11-21 19:52:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-21 19:52:25,342 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 4.0) internal successors, (280), 71 states have internal predecessors, (280), 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 94 [2023-11-21 19:52:25,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:52:25,347 INFO L225 Difference]: With dead ends: 128 [2023-11-21 19:52:25,347 INFO L226 Difference]: Without dead ends: 127 [2023-11-21 19:52:25,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2012, Invalid=3840, Unknown=0, NotChecked=0, Total=5852 [2023-11-21 19:52:25,351 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:52:25,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 94 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:52:25,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-21 19:52:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-11-21 19:52:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 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) [2023-11-21 19:52:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2023-11-21 19:52:25,380 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 94 [2023-11-21 19:52:25,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:52:25,381 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2023-11-21 19:52:25,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 4.0) internal successors, (280), 71 states have internal predecessors, (280), 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) [2023-11-21 19:52:25,381 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2023-11-21 19:52:25,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-21 19:52:25,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:52:25,389 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 30, 1, 1, 1] [2023-11-21 19:52:25,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 19:52:25,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:52:25,602 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-21 19:52:25,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:52:25,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1145824715, now seen corresponding path program 5 times [2023-11-21 19:52:25,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:52:25,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628440572] [2023-11-21 19:52:25,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:52:25,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:52:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:52:25,705 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:52:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:52:25,830 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:52:25,830 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:52:25,832 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2023-11-21 19:52:25,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2023-11-21 19:52:25,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 19:52:25,841 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1, 1] [2023-11-21 19:52:25,848 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 19:52:25,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 07:52:25 BoogieIcfgContainer [2023-11-21 19:52:25,891 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 19:52:25,892 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 19:52:25,892 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 19:52:25,892 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 19:52:25,894 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:52:12" (3/4) ... [2023-11-21 19:52:25,894 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-21 19:52:25,980 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/witness.graphml [2023-11-21 19:52:25,980 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 19:52:25,980 INFO L158 Benchmark]: Toolchain (without parser) took 14238.89ms. Allocated memory was 144.7MB in the beginning and 251.7MB in the end (delta: 107.0MB). Free memory was 99.7MB in the beginning and 97.4MB in the end (delta: 2.3MB). Peak memory consumption was 110.9MB. Max. memory is 16.1GB. [2023-11-21 19:52:25,981 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 119.5MB. Free memory is still 65.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:52:25,981 INFO L158 Benchmark]: CACSL2BoogieTranslator took 380.50ms. Allocated memory is still 144.7MB. Free memory was 99.7MB in the beginning and 89.7MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-21 19:52:25,981 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.75ms. Allocated memory is still 144.7MB. Free memory was 89.7MB in the beginning and 88.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 19:52:25,982 INFO L158 Benchmark]: Boogie Preprocessor took 29.15ms. Allocated memory is still 144.7MB. Free memory was 88.0MB in the beginning and 87.1MB in the end (delta: 966.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 19:52:25,982 INFO L158 Benchmark]: RCFGBuilder took 399.94ms. Allocated memory is still 144.7MB. Free memory was 87.1MB in the beginning and 76.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-21 19:52:25,983 INFO L158 Benchmark]: TraceAbstraction took 13279.42ms. Allocated memory was 144.7MB in the beginning and 251.7MB in the end (delta: 107.0MB). Free memory was 75.5MB in the beginning and 100.7MB in the end (delta: -25.2MB). Peak memory consumption was 83.6MB. Max. memory is 16.1GB. [2023-11-21 19:52:25,983 INFO L158 Benchmark]: Witness Printer took 87.94ms. Allocated memory is still 251.7MB. Free memory was 100.7MB in the beginning and 97.4MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-21 19:52:25,985 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 119.5MB. Free memory is still 65.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 380.50ms. Allocated memory is still 144.7MB. Free memory was 99.7MB in the beginning and 89.7MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.75ms. Allocated memory is still 144.7MB. Free memory was 89.7MB in the beginning and 88.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.15ms. Allocated memory is still 144.7MB. Free memory was 88.0MB in the beginning and 87.1MB in the end (delta: 966.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 399.94ms. Allocated memory is still 144.7MB. Free memory was 87.1MB in the beginning and 76.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 13279.42ms. Allocated memory was 144.7MB in the beginning and 251.7MB in the end (delta: 107.0MB). Free memory was 75.5MB in the beginning and 100.7MB in the end (delta: -25.2MB). Peak memory consumption was 83.6MB. Max. memory is 16.1GB. * Witness Printer took 87.94ms. Allocated memory is still 251.7MB. Free memory was 100.7MB in the beginning and 97.4MB in the end (delta: 3.3MB). 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 - CounterExampleResult [Line: 24]: integer overflow possible integer overflow possible We found a FailurePath: [L20] int x = __VERIFIER_nondet_int(); [L21] int y = __VERIFIER_nondet_int(); [L22] COND FALSE !(!(x==1 && y==1)) VAL [x=1, y=1] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=2, y=2] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=4, y=4] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=8, y=8] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=16, y=16] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=32, y=32] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=64, y=64] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=128, y=128] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=256, y=256] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=512, y=512] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=1024, y=1024] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=2048, y=2048] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=4096, y=4096] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=8192, y=8192] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=16384, y=16384] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=32768, y=32768] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=65536, y=65536] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=131072, y=131072] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=262144, y=262144] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=524288, y=524288] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=1048576, y=1048576] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=2097152, y=2097152] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=4194304, y=4194304] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=8388608, y=8388608] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=16777216, y=16777216] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=33554432, y=33554432] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=67108864, y=67108864] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=134217728, y=134217728] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=268435456, y=268435456] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=536870912, y=536870912] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x VAL [x=1073741824, y=1073741824] [L23] COND TRUE __VERIFIER_nondet_bool() [L24] x+y VAL [x=1073741824, y=1073741824] - UnprovableResult [Line: 24]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 13.1s, OverallIterations: 7, TraceHistogramMax: 31, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 211 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 186 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 240 IncrementalHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 25 mSDtfsCounter, 240 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 561 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=127occurred in iteration=6, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 481 NumberOfCodeBlocks, 481 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 513 ConstructedInterpolants, 0 QuantifiedInterpolants, 3133 SizeOfPredicates, 8 NumberOfNonLiveVariables, 412 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 0/3828 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 RESULT: Ultimate proved your program to be incorrect! [2023-11-21 19:52:26,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba6b916-6ed5-424c-bc8d-17419b2d0865/bin/utaipan-verify-QoSU8krkJ5/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW)