./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-15/array04_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-15/array04_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91 --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 64bit --witnessprinter.graph.data.programhash 1183c091737a27abb58fd8d0696c96a2bb1d5baea63debedec24831694536a86 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:55:02,635 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:55:02,720 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-24 23:55:02,726 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:55:02,727 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:55:02,754 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:55:02,755 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:55:02,756 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:55:02,756 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:55:02,757 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:55:02,758 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:55:02,758 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:55:02,759 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:55:02,759 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:55:02,760 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:55:02,760 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:55:02,761 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:55:02,762 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:55:02,762 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:55:02,763 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:55:02,763 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:55:02,770 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:55:02,771 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:55:02,772 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:55:02,773 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:55:02,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:55:02,773 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:55:02,774 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:55:02,774 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:55:02,775 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 23:55:02,776 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:55:02,776 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:55:02,777 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:55:02,777 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:55:02,777 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:55:02,778 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:55:02,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:55:02,779 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:55:02,779 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:55:02,779 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:55:02,779 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:55:02,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:55:02,780 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:55:02,780 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:55:02,781 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:55:02,781 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:55:02,781 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_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1183c091737a27abb58fd8d0696c96a2bb1d5baea63debedec24831694536a86 [2023-11-24 23:55:03,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:55:03,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:55:03,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:55:03,145 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:55:03,146 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:55:03,148 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/termination-15/array04_alloca.i [2023-11-24 23:55:06,235 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:55:06,568 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:55:06,568 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/sv-benchmarks/c/termination-15/array04_alloca.i [2023-11-24 23:55:06,584 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/data/cc304a1d4/4f63e07e720f4cd6b5a2a4182c749439/FLAGe0e348090 [2023-11-24 23:55:06,601 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/data/cc304a1d4/4f63e07e720f4cd6b5a2a4182c749439 [2023-11-24 23:55:06,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:55:06,609 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:55:06,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:55:06,613 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:55:06,618 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:55:06,621 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:55:06" (1/1) ... [2023-11-24 23:55:06,623 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ba2785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:06, skipping insertion in model container [2023-11-24 23:55:06,623 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:55:06" (1/1) ... [2023-11-24 23:55:06,660 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:55:07,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:55:07,018 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:55:07,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:55:07,093 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:55:07,094 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:07 WrapperNode [2023-11-24 23:55:07,094 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:55:07,095 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:55:07,096 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:55:07,096 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:55:07,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:07" (1/1) ... [2023-11-24 23:55:07,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:07" (1/1) ... [2023-11-24 23:55:07,151 INFO L138 Inliner]: procedures = 151, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2023-11-24 23:55:07,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:55:07,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:55:07,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:55:07,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:55:07,161 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:07" (1/1) ... [2023-11-24 23:55:07,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:07" (1/1) ... [2023-11-24 23:55:07,163 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:07" (1/1) ... [2023-11-24 23:55:07,164 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:07" (1/1) ... [2023-11-24 23:55:07,169 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:07" (1/1) ... [2023-11-24 23:55:07,172 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:07" (1/1) ... [2023-11-24 23:55:07,174 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:07" (1/1) ... [2023-11-24 23:55:07,175 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:07" (1/1) ... [2023-11-24 23:55:07,185 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:55:07,187 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:55:07,188 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:55:07,192 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:55:07,193 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:07" (1/1) ... [2023-11-24 23:55:07,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:55:07,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:07,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:55:07,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:55:07,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:55:07,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:55:07,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:55:07,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:55:07,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:55:07,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:55:07,348 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:55:07,351 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:55:07,513 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:55:07,585 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:55:07,585 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:55:07,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:55:07 BoogieIcfgContainer [2023-11-24 23:55:07,587 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:55:07,594 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:55:07,594 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:55:07,598 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:55:07,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:55:06" (1/3) ... [2023-11-24 23:55:07,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc8fbd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:55:07, skipping insertion in model container [2023-11-24 23:55:07,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:07" (2/3) ... [2023-11-24 23:55:07,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc8fbd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:55:07, skipping insertion in model container [2023-11-24 23:55:07,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:55:07" (3/3) ... [2023-11-24 23:55:07,601 INFO L112 eAbstractionObserver]: Analyzing ICFG array04_alloca.i [2023-11-24 23:55:07,620 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:55:07,621 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-24 23:55:07,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:55:07,674 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;@34b36940, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:55:07,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-24 23:55:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 23:55:07,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:07,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 23:55:07,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-24 23:55:07,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2785685, now seen corresponding path program 1 times [2023-11-24 23:55:07,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:07,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770554701] [2023-11-24 23:55:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:07,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:07,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:07,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770554701] [2023-11-24 23:55:07,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770554701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:07,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:07,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:55:07,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718357601] [2023-11-24 23:55:07,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:07,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:55:07,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:08,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:55:08,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:55:08,024 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:08,096 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-24 23:55:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:55:08,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-24 23:55:08,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:08,108 INFO L225 Difference]: With dead ends: 25 [2023-11-24 23:55:08,108 INFO L226 Difference]: Without dead ends: 20 [2023-11-24 23:55:08,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:55:08,114 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:08,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:55:08,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-24 23:55:08,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2023-11-24 23:55:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-24 23:55:08,154 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 4 [2023-11-24 23:55:08,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:08,155 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-24 23:55:08,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:08,155 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-24 23:55:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 23:55:08,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:08,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 23:55:08,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:55:08,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-24 23:55:08,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:08,158 INFO L85 PathProgramCache]: Analyzing trace with hash 86362539, now seen corresponding path program 1 times [2023-11-24 23:55:08,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:08,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468862677] [2023-11-24 23:55:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:08,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:08,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:08,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468862677] [2023-11-24 23:55:08,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468862677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:08,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:08,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:55:08,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938934425] [2023-11-24 23:55:08,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:08,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:55:08,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:08,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:55:08,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:55:08,287 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2023-11-24 23:55:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:08,325 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2023-11-24 23:55:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:55:08,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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 [2023-11-24 23:55:08,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:08,326 INFO L225 Difference]: With dead ends: 21 [2023-11-24 23:55:08,327 INFO L226 Difference]: Without dead ends: 15 [2023-11-24 23:55:08,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:55:08,329 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:08,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:55:08,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-24 23:55:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-24 23:55:08,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-24 23:55:08,334 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2023-11-24 23:55:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:08,335 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-24 23:55:08,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2023-11-24 23:55:08,335 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-24 23:55:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 23:55:08,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:08,336 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-24 23:55:08,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:55:08,337 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-24 23:55:08,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:08,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1384021578, now seen corresponding path program 1 times [2023-11-24 23:55:08,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:08,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223421788] [2023-11-24 23:55:08,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:08,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:08,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:08,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223421788] [2023-11-24 23:55:08,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223421788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:55:08,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813421011] [2023-11-24 23:55:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:08,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:08,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:08,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:08,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:55:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:08,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:55:08,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:08,744 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:08,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813421011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:08,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:55:08,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-24 23:55:08,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183460890] [2023-11-24 23:55:08,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:08,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:55:08,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:08,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:55:08,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:55:08,748 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 6 states, 5 states have (on average 1.4) 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) [2023-11-24 23:55:08,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:08,791 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2023-11-24 23:55:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:55:08,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) 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) Word has length 7 [2023-11-24 23:55:08,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:08,793 INFO L225 Difference]: With dead ends: 15 [2023-11-24 23:55:08,794 INFO L226 Difference]: Without dead ends: 14 [2023-11-24 23:55:08,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:55:08,796 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:08,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 12 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:55:08,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-24 23:55:08,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-24 23:55:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 13 states have internal predecessors, (15), 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) [2023-11-24 23:55:08,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-11-24 23:55:08,804 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2023-11-24 23:55:08,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:08,804 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-11-24 23:55:08,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) 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) [2023-11-24 23:55:08,805 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-11-24 23:55:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 23:55:08,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:08,806 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-24 23:55:08,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:09,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:09,013 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-24 23:55:09,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:09,014 INFO L85 PathProgramCache]: Analyzing trace with hash -45003984, now seen corresponding path program 1 times [2023-11-24 23:55:09,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:09,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537396124] [2023-11-24 23:55:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:09,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:09,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:09,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537396124] [2023-11-24 23:55:09,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537396124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:55:09,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066987658] [2023-11-24 23:55:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:09,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:09,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:09,125 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:09,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:55:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:09,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:55:09,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:09,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:55:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:09,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066987658] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:55:09,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [762128199] [2023-11-24 23:55:09,338 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-24 23:55:09,338 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:55:09,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:55:09,347 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:55:09,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:55:10,364 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:55:10,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '239#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc206#1.offset| 0) (<= 2147483647 |ULTIMATE.start_main_#t~post207#1|) (<= 2 |ULTIMATE.start_main_~arr~0#1.base|) (= |ULTIMATE.start_main_~arr~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 2 |ULTIMATE.start_main_#t~malloc206#1.base|))' at error location [2023-11-24 23:55:10,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:55:10,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:55:10,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-24 23:55:10,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413936202] [2023-11-24 23:55:10,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:55:10,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 23:55:10,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:10,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 23:55:10,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:55:10,933 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:11,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:11,094 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-11-24 23:55:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 23:55:11,094 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 23:55:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:11,096 INFO L225 Difference]: With dead ends: 39 [2023-11-24 23:55:11,097 INFO L226 Difference]: Without dead ends: 38 [2023-11-24 23:55:11,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-24 23:55:11,102 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:11,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 60 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:11,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-24 23:55:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 23. [2023-11-24 23:55:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.35) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-24 23:55:11,115 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 8 [2023-11-24 23:55:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:11,115 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-24 23:55:11,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:11,116 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-24 23:55:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 23:55:11,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:11,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:11,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:11,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:11,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-24 23:55:11,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:11,324 INFO L85 PathProgramCache]: Analyzing trace with hash -44997738, now seen corresponding path program 1 times [2023-11-24 23:55:11,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:11,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030509932] [2023-11-24 23:55:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:11,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:11,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:11,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030509932] [2023-11-24 23:55:11,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030509932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:55:11,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493279746] [2023-11-24 23:55:11,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:11,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:11,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:11,610 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:11,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:55:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:11,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 23:55:11,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:11,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 23:55:11,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-24 23:55:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:11,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:55:11,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-24 23:55:11,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-24 23:55:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:11,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493279746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:55:11,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [621887626] [2023-11-24 23:55:11,838 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-24 23:55:11,839 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:55:11,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:55:11,840 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:55:11,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:55:12,676 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:55:13,739 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '381#(and (<= |ULTIMATE.start_main_~length~0#1| |ULTIMATE.start_main_~i~0#1|) (exists ((|v_ULTIMATE.start_main_~i~0#1_32| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc206#1.offset| 0) (<= 2 |ULTIMATE.start_main_~arr~0#1.base|) (= |ULTIMATE.start_main_~arr~0#1.offset| 0) (<= 0 |v_ULTIMATE.start_main_~i~0#1_32|) (<= 2 |ULTIMATE.start_main_#t~malloc206#1.base|))) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem209#1| (select (select |#memory_int| |ULTIMATE.start_main_~arr~0#1.base|) |ULTIMATE.start_main_~arr~0#1.offset|)) (<= (+ 2147483649 |ULTIMATE.start_main_#t~mem209#1|) 0))' at error location [2023-11-24 23:55:13,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:55:13,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:55:13,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-24 23:55:13,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284273212] [2023-11-24 23:55:13,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:55:13,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 23:55:13,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:13,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 23:55:13,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-24 23:55:13,742 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:13,861 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-11-24 23:55:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:55:13,861 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 23:55:13,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:13,863 INFO L225 Difference]: With dead ends: 28 [2023-11-24 23:55:13,864 INFO L226 Difference]: Without dead ends: 27 [2023-11-24 23:55:13,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-11-24 23:55:13,865 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:13,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 16 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-24 23:55:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-11-24 23:55:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 24 states have internal predecessors, (29), 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) [2023-11-24 23:55:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-24 23:55:13,872 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 8 [2023-11-24 23:55:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:13,872 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-24 23:55:13,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-24 23:55:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 23:55:13,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:13,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:13,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:14,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:14,079 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-24 23:55:14,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:14,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1394929803, now seen corresponding path program 1 times [2023-11-24 23:55:14,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:14,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329946778] [2023-11-24 23:55:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:14,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:14,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:14,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329946778] [2023-11-24 23:55:14,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329946778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:55:14,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013774234] [2023-11-24 23:55:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:14,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:14,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:14,258 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:14,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:55:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:14,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 23:55:14,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:14,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 23:55:14,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 23:55:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:14,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:55:14,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-24 23:55:14,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-24 23:55:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:14,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013774234] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:55:14,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1340306460] [2023-11-24 23:55:14,423 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-24 23:55:14,423 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:55:14,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:55:14,424 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:55:14,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:55:15,094 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:55:16,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '519#(and (<= |ULTIMATE.start_main_~length~0#1| |ULTIMATE.start_main_~i~0#1|) (<= 2147483648 |ULTIMATE.start_main_#t~mem209#1|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (exists ((|v_ULTIMATE.start_main_~i~0#1_38| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~0#1_38|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc206#1.offset| 0) (<= 2 |ULTIMATE.start_main_~arr~0#1.base|) (= |ULTIMATE.start_main_~arr~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc206#1.base|))) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem209#1| (select (select |#memory_int| |ULTIMATE.start_main_~arr~0#1.base|) |ULTIMATE.start_main_~arr~0#1.offset|)))' at error location [2023-11-24 23:55:16,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:55:16,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:55:16,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-24 23:55:16,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101386181] [2023-11-24 23:55:16,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:55:16,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 23:55:16,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:16,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 23:55:16,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-24 23:55:16,209 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:16,306 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-11-24 23:55:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:55:16,307 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-24 23:55:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:16,308 INFO L225 Difference]: With dead ends: 27 [2023-11-24 23:55:16,308 INFO L226 Difference]: Without dead ends: 26 [2023-11-24 23:55:16,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-11-24 23:55:16,309 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:16,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:55:16,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-24 23:55:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-24 23:55:16,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-24 23:55:16,315 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 9 [2023-11-24 23:55:16,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:16,315 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-24 23:55:16,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:16,315 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-24 23:55:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 23:55:16,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:16,316 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:16,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:16,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 23:55:16,522 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-24 23:55:16,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:16,523 INFO L85 PathProgramCache]: Analyzing trace with hash -497742057, now seen corresponding path program 1 times [2023-11-24 23:55:16,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:16,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136279152] [2023-11-24 23:55:16,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:16,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:16,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:16,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136279152] [2023-11-24 23:55:16,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136279152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:55:16,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025081672] [2023-11-24 23:55:16,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:16,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:16,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:16,893 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:16,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:55:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:16,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 23:55:16,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:16,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 23:55:17,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 23:55:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:17,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:55:17,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-11-24 23:55:17,452 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 23:55:17,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 40 [2023-11-24 23:55:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:17,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025081672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:55:17,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1936885161] [2023-11-24 23:55:17,493 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-24 23:55:17,493 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:55:17,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:55:17,493 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:55:17,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:55:18,281 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:55:18,975 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '680#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483646) (<= (+ 2147483649 |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_#t~mem209#1|) 0))' at error location [2023-11-24 23:55:18,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:55:18,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:55:18,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-11-24 23:55:18,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171687479] [2023-11-24 23:55:18,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:55:18,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 23:55:18,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:18,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 23:55:18,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2023-11-24 23:55:18,978 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:20,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:20,146 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-11-24 23:55:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-24 23:55:20,146 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-24 23:55:20,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:20,147 INFO L225 Difference]: With dead ends: 38 [2023-11-24 23:55:20,147 INFO L226 Difference]: Without dead ends: 37 [2023-11-24 23:55:20,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2023-11-24 23:55:20,149 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 70 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:20,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 6 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:55:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-24 23:55:20,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2023-11-24 23:55:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 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) [2023-11-24 23:55:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-11-24 23:55:20,157 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 11 [2023-11-24 23:55:20,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:20,158 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-11-24 23:55:20,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-11-24 23:55:20,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 23:55:20,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:20,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:20,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:20,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:20,365 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-24 23:55:20,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:20,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1749865492, now seen corresponding path program 1 times [2023-11-24 23:55:20,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:20,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019249940] [2023-11-24 23:55:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:20,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:20,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:20,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019249940] [2023-11-24 23:55:20,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019249940] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:55:20,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211945101] [2023-11-24 23:55:20,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:20,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:20,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:20,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:20,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:55:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:20,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 23:55:20,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:20,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 23:55:20,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 23:55:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:20,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:55:21,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-11-24 23:55:21,255 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 23:55:21,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 38 [2023-11-24 23:55:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:21,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211945101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:55:21,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [391682076] [2023-11-24 23:55:21,292 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-24 23:55:21,292 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:55:21,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:55:21,293 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:55:21,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:55:22,088 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:55:22,698 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '898#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 2147483648 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_#t~mem209#1|)) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|))' at error location [2023-11-24 23:55:22,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:55:22,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:55:22,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-24 23:55:22,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965051773] [2023-11-24 23:55:22,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:55:22,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-24 23:55:22,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:22,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-24 23:55:22,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2023-11-24 23:55:22,701 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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) [2023-11-24 23:55:23,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:23,156 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-11-24 23:55:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:55:23,156 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 23:55:23,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:23,157 INFO L225 Difference]: With dead ends: 36 [2023-11-24 23:55:23,157 INFO L226 Difference]: Without dead ends: 28 [2023-11-24 23:55:23,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2023-11-24 23:55:23,159 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:23,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 36 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:55:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-24 23:55:23,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-24 23:55:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 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) [2023-11-24 23:55:23,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-11-24 23:55:23,165 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2023-11-24 23:55:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:23,165 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-11-24 23:55:23,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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) [2023-11-24 23:55:23,166 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-11-24 23:55:23,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 23:55:23,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:23,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-24 23:55:23,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:23,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:23,372 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-24 23:55:23,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:23,372 INFO L85 PathProgramCache]: Analyzing trace with hash -381203511, now seen corresponding path program 2 times [2023-11-24 23:55:23,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:23,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317832183] [2023-11-24 23:55:23,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:23,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 23:55:23,405 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 23:55:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 23:55:23,451 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-24 23:55:23,452 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 23:55:23,454 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 4 remaining) [2023-11-24 23:55:23,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 4 remaining) [2023-11-24 23:55:23,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 4 remaining) [2023-11-24 23:55:23,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 4 remaining) [2023-11-24 23:55:23,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:55:23,460 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:23,465 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 23:55:23,483 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,486 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,487 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,487 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,487 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,488 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,490 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem209 could not be translated [2023-11-24 23:55:23,490 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,491 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem209 could not be translated [2023-11-24 23:55:23,491 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem209 could not be translated [2023-11-24 23:55:23,491 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 11:55:23 BoogieIcfgContainer [2023-11-24 23:55:23,499 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 23:55:23,500 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 23:55:23,500 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 23:55:23,500 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 23:55:23,500 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:55:07" (3/4) ... [2023-11-24 23:55:23,501 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-24 23:55:23,506 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,506 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,509 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,509 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,510 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,511 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem209 could not be translated [2023-11-24 23:55:23,511 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,512 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem209 could not be translated [2023-11-24 23:55:23,512 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,512 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem209 could not be translated [2023-11-24 23:55:23,512 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc206 [2023-11-24 23:55:23,552 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2492361b-717f-42b1-a73d-ba98b909f8f8/bin/utaipan-verify-SwPr7d2a91/witness.graphml [2023-11-24 23:55:23,553 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 23:55:23,553 INFO L158 Benchmark]: Toolchain (without parser) took 16944.90ms. Allocated memory was 161.5MB in the beginning and 287.3MB in the end (delta: 125.8MB). Free memory was 115.2MB in the beginning and 135.2MB in the end (delta: -20.0MB). Peak memory consumption was 106.9MB. Max. memory is 16.1GB. [2023-11-24 23:55:23,554 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 102.8MB. Free memory is still 55.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:55:23,554 INFO L158 Benchmark]: CACSL2BoogieTranslator took 482.13ms. Allocated memory is still 161.5MB. Free memory was 114.6MB in the beginning and 96.8MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-24 23:55:23,554 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.04ms. Allocated memory is still 161.5MB. Free memory was 96.8MB in the beginning and 95.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:55:23,555 INFO L158 Benchmark]: Boogie Preprocessor took 34.50ms. Allocated memory is still 161.5MB. Free memory was 95.3MB in the beginning and 94.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 23:55:23,555 INFO L158 Benchmark]: RCFGBuilder took 399.86ms. Allocated memory is still 161.5MB. Free memory was 93.6MB in the beginning and 81.1MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-24 23:55:23,556 INFO L158 Benchmark]: TraceAbstraction took 15905.26ms. Allocated memory was 161.5MB in the beginning and 287.3MB in the end (delta: 125.8MB). Free memory was 80.6MB in the beginning and 137.3MB in the end (delta: -56.7MB). Peak memory consumption was 71.2MB. Max. memory is 16.1GB. [2023-11-24 23:55:23,556 INFO L158 Benchmark]: Witness Printer took 53.30ms. Allocated memory is still 287.3MB. Free memory was 137.3MB in the beginning and 135.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 23:55:23,558 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 102.8MB. Free memory is still 55.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 482.13ms. Allocated memory is still 161.5MB. Free memory was 114.6MB in the beginning and 96.8MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.04ms. Allocated memory is still 161.5MB. Free memory was 96.8MB in the beginning and 95.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 34.50ms. Allocated memory is still 161.5MB. Free memory was 95.3MB in the beginning and 94.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 399.86ms. Allocated memory is still 161.5MB. Free memory was 93.6MB in the beginning and 81.1MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 15905.26ms. Allocated memory was 161.5MB in the beginning and 287.3MB in the end (delta: 125.8MB). Free memory was 80.6MB in the beginning and 137.3MB in the end (delta: -56.7MB). Peak memory consumption was 71.2MB. Max. memory is 16.1GB. * Witness Printer took 53.30ms. Allocated memory is still 287.3MB. Free memory was 137.3MB in the beginning and 135.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem209 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem209 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem209 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem209 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem209 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem209 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc206 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 375]: integer overflow possible integer overflow possible We found a FailurePath: [L365] int i, j; [L366] int length = __VERIFIER_nondet_int(); [L367] COND FALSE !(length < 1) [L368] int *arr = __builtin_alloca(length*sizeof(int)); VAL [arr={2:0}, length=2] [L369] COND FALSE !(!arr) [L370] i=0 VAL [arr={2:0}, i=0, length=2] [L370] COND TRUE i