./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 527bcce2 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_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:49:27,144 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:49:27,277 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-21 19:49:27,285 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:49:27,286 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:49:27,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:49:27,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:49:27,334 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:49:27,335 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:49:27,340 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:49:27,341 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:49:27,342 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:49:27,343 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:49:27,345 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:49:27,345 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:49:27,346 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:49:27,346 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:49:27,346 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:49:27,347 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:49:27,347 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:49:27,348 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:49:27,349 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:49:27,350 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:49:27,350 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:49:27,351 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:49:27,351 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:49:27,352 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:49:27,352 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:49:27,353 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:49:27,353 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:49:27,355 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:49:27,355 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-21 19:49:27,355 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 19:49:27,356 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:49:27,356 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:49:27,356 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:49:27,356 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:49:27,357 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:49:27,357 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:49:27,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:49:27,358 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:49:27,358 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:49:27,358 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:49:27,359 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:49:27,359 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:49:27,360 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:49:27,360 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:49:27,360 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:49:27,360 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:49:27,361 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_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 [2023-11-21 19:49:27,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:49:27,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:49:27,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:49:27,750 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:49:27,752 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:49:27,754 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2023-11-21 19:49:31,047 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:49:31,244 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:49:31,245 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2023-11-21 19:49:31,255 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/data/ae858b32f/586e80b2a71645c4be82140578571319/FLAG2dcd85de4 [2023-11-21 19:49:31,272 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/data/ae858b32f/586e80b2a71645c4be82140578571319 [2023-11-21 19:49:31,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:49:31,277 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:49:31,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:49:31,280 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:49:31,287 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:49:31,288 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:49:31" (1/1) ... [2023-11-21 19:49:31,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b27953a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:49:31, skipping insertion in model container [2023-11-21 19:49:31,290 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:49:31" (1/1) ... [2023-11-21 19:49:31,314 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:49:31,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:49:31,517 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:49:31,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:49:31,553 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:49:31,554 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:49:31 WrapperNode [2023-11-21 19:49:31,554 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:49:31,555 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:49:31,555 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:49:31,555 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:49:31,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:49:31" (1/1) ... [2023-11-21 19:49:31,567 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:49:31" (1/1) ... [2023-11-21 19:49:31,598 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-11-21 19:49:31,601 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:49:31,602 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:49:31,602 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:49:31,603 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:49:31,613 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:49:31" (1/1) ... [2023-11-21 19:49:31,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:49:31" (1/1) ... [2023-11-21 19:49:31,616 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:49:31" (1/1) ... [2023-11-21 19:49:31,616 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:49:31" (1/1) ... [2023-11-21 19:49:31,623 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:49:31" (1/1) ... [2023-11-21 19:49:31,628 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:49:31" (1/1) ... [2023-11-21 19:49:31,629 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:49:31" (1/1) ... [2023-11-21 19:49:31,630 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:49:31" (1/1) ... [2023-11-21 19:49:31,632 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:49:31,633 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:49:31,634 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:49:31,634 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:49:31,635 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:49:31" (1/1) ... [2023-11-21 19:49:31,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:49:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:49:31,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:49:31,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:49:31,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:49:31,717 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 19:49:31,717 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 19:49:31,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:49:31,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:49:31,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:49:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 19:49:31,721 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 19:49:31,811 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:49:31,814 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:49:32,151 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:49:32,192 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:49:32,192 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 19:49:32,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:49:32 BoogieIcfgContainer [2023-11-21 19:49:32,194 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:49:32,198 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:49:32,198 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:49:32,202 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:49:32,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:49:31" (1/3) ... [2023-11-21 19:49:32,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545895a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:49:32, skipping insertion in model container [2023-11-21 19:49:32,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:49:31" (2/3) ... [2023-11-21 19:49:32,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545895a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:49:32, skipping insertion in model container [2023-11-21 19:49:32,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:49:32" (3/3) ... [2023-11-21 19:49:32,206 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound20.c [2023-11-21 19:49:32,227 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:49:32,228 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-21 19:49:32,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:49:32,290 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;@519d0b5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:49:32,290 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-21 19:49:32,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 25 states have (on average 1.76) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 19:49:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-21 19:49:32,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:49:32,304 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:49:32,304 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-11-21 19:49:32,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:49:32,311 INFO L85 PathProgramCache]: Analyzing trace with hash 942087750, now seen corresponding path program 1 times [2023-11-21 19:49:32,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:49:32,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115865283] [2023-11-21 19:49:32,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:49:32,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:49:32,438 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:49:32,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267170224] [2023-11-21 19:49:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:49:32,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:49:32,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:49:32,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:49:32,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:49:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:49:32,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 19:49:32,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:49:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:49:32,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:49:33,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:49:33,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115865283] [2023-11-21 19:49:33,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:49:33,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267170224] [2023-11-21 19:49:33,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267170224] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:49:33,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [284487056] [2023-11-21 19:49:33,332 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-21 19:49:33,332 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:49:33,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:49:33,349 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:49:33,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:49:34,129 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-21 19:49:34,132 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:49:34,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [284487056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:49:34,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:49:34,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 13 [2023-11-21 19:49:34,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53199551] [2023-11-21 19:49:34,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:49:34,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 19:49:34,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:49:34,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 19:49:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-21 19:49:34,662 INFO L87 Difference]: Start difference. First operand has 49 states, 25 states have (on average 1.76) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 10 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:49:35,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:49:35,058 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2023-11-21 19:49:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 19:49:35,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 14 [2023-11-21 19:49:35,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:49:35,069 INFO L225 Difference]: With dead ends: 78 [2023-11-21 19:49:35,069 INFO L226 Difference]: Without dead ends: 54 [2023-11-21 19:49:35,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-21 19:49:35,077 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 246 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:49:35,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 44 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:49:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-21 19:49:35,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-21 19:49:35,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.4) internal successors, (49), 46 states have internal predecessors, (49), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 19:49:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2023-11-21 19:49:35,131 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 14 [2023-11-21 19:49:35,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:49:35,133 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2023-11-21 19:49:35,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:49:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2023-11-21 19:49:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 19:49:35,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:49:35,136 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:49:35,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:49:35,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 19:49:35,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-11-21 19:49:35,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:49:35,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1451133285, now seen corresponding path program 1 times [2023-11-21 19:49:35,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:49:35,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822274165] [2023-11-21 19:49:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:49:35,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:49:35,379 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:49:35,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301354031] [2023-11-21 19:49:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:49:35,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:49:35,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:49:35,383 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:49:35,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:49:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:49:35,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:49:35,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:49:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 19:49:35,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:49:35,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:49:35,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822274165] [2023-11-21 19:49:35,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:49:35,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301354031] [2023-11-21 19:49:35,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301354031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:49:35,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:49:35,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:49:35,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896790699] [2023-11-21 19:49:35,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:49:35,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:49:35,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:49:35,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:49:35,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:49:35,472 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 19:49:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:49:35,523 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-11-21 19:49:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:49:35,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2023-11-21 19:49:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:49:35,526 INFO L225 Difference]: With dead ends: 54 [2023-11-21 19:49:35,526 INFO L226 Difference]: Without dead ends: 53 [2023-11-21 19:49:35,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:49:35,528 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:49:35,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 52 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:49:35,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-21 19:49:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-21 19:49:35,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 45 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 19:49:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2023-11-21 19:49:35,549 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 27 [2023-11-21 19:49:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:49:35,549 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2023-11-21 19:49:35,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 19:49:35,550 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2023-11-21 19:49:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 19:49:35,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:49:35,551 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:49:35,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:49:35,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:49:35,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-11-21 19:49:35,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:49:35,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1451442118, now seen corresponding path program 1 times [2023-11-21 19:49:35,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:49:35,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700768535] [2023-11-21 19:49:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:49:35,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:49:35,772 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:49:35,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905195579] [2023-11-21 19:49:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:49:35,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:49:35,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:49:35,774 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:49:35,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:49:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:49:35,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 19:49:35,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:49:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 19:49:35,885 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:49:35,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:49:35,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700768535] [2023-11-21 19:49:35,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:49:35,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905195579] [2023-11-21 19:49:35,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905195579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:49:35,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:49:35,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:49:35,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546551432] [2023-11-21 19:49:35,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:49:35,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:49:35,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:49:35,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:49:35,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:49:35,890 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 19:49:36,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:49:36,037 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2023-11-21 19:49:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:49:36,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-11-21 19:49:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:49:36,040 INFO L225 Difference]: With dead ends: 74 [2023-11-21 19:49:36,040 INFO L226 Difference]: Without dead ends: 73 [2023-11-21 19:49:36,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:49:36,042 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 64 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:49:36,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 40 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:49:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-21 19:49:36,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2023-11-21 19:49:36,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 48 states have (on average 1.4375) internal successors, (69), 58 states have internal predecessors, (69), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 19:49:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2023-11-21 19:49:36,057 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 27 [2023-11-21 19:49:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:49:36,057 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2023-11-21 19:49:36,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 19:49:36,058 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2023-11-21 19:49:36,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 19:49:36,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:49:36,059 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:49:36,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:49:36,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:49:36,273 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-11-21 19:49:36,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:49:36,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2035458950, now seen corresponding path program 1 times [2023-11-21 19:49:36,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:49:36,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081029175] [2023-11-21 19:49:36,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:49:36,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:49:36,289 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:49:36,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218045461] [2023-11-21 19:49:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:49:36,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:49:36,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:49:36,293 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:49:36,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:49:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:49:36,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 19:49:36,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:49:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 19:49:36,408 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:49:36,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:49:36,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081029175] [2023-11-21 19:49:36,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:49:36,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218045461] [2023-11-21 19:49:36,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218045461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:49:36,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:49:36,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:49:36,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618959942] [2023-11-21 19:49:36,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:49:36,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:49:36,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:49:36,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:49:36,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:49:36,411 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 19:49:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:49:36,465 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2023-11-21 19:49:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:49:36,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-11-21 19:49:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:49:36,467 INFO L225 Difference]: With dead ends: 67 [2023-11-21 19:49:36,467 INFO L226 Difference]: Without dead ends: 65 [2023-11-21 19:49:36,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:49:36,469 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:49:36,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:49:36,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-21 19:49:36,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-21 19:49:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.375) internal successors, (66), 56 states have internal predecessors, (66), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 19:49:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2023-11-21 19:49:36,485 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 28 [2023-11-21 19:49:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:49:36,485 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2023-11-21 19:49:36,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 19:49:36,486 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2023-11-21 19:49:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 19:49:36,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:49:36,487 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:49:36,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 19:49:36,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:49:36,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-11-21 19:49:36,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:49:36,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1325281910, now seen corresponding path program 1 times [2023-11-21 19:49:36,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:49:36,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457162159] [2023-11-21 19:49:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:49:36,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:49:36,735 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:49:36,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663678134] [2023-11-21 19:49:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:49:36,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:49:36,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:49:36,744 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:49:36,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 19:49:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:49:36,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:49:36,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:49:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 19:49:36,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:49:36,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:49:36,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457162159] [2023-11-21 19:49:36,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:49:36,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663678134] [2023-11-21 19:49:36,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663678134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:49:36,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:49:36,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:49:36,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690654669] [2023-11-21 19:49:36,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:49:36,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:49:36,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:49:36,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:49:36,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:49:36,855 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 19:49:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:49:36,929 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2023-11-21 19:49:36,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:49:36,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-11-21 19:49:36,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:49:36,932 INFO L225 Difference]: With dead ends: 70 [2023-11-21 19:49:36,932 INFO L226 Difference]: Without dead ends: 69 [2023-11-21 19:49:36,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:49:36,936 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:49:36,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 47 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:49:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-21 19:49:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2023-11-21 19:49:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 59 states have internal predecessors, (69), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 19:49:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2023-11-21 19:49:36,963 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 29 [2023-11-21 19:49:36,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:49:36,964 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2023-11-21 19:49:36,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 19:49:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2023-11-21 19:49:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 19:49:36,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:49:36,966 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:49:36,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 19:49:37,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:49:37,187 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-11-21 19:49:37,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:49:37,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1865933832, now seen corresponding path program 1 times [2023-11-21 19:49:37,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:49:37,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013197945] [2023-11-21 19:49:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:49:37,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:49:37,202 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:49:37,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444630153] [2023-11-21 19:49:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:49:37,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:49:37,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:49:37,239 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:49:37,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 19:49:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:49:37,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:49:37,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:49:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 19:49:37,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:49:37,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:49:37,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013197945] [2023-11-21 19:49:37,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:49:37,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444630153] [2023-11-21 19:49:37,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444630153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:49:37,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:49:37,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:49:37,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769640626] [2023-11-21 19:49:37,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:49:37,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:49:37,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:49:37,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:49:37,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:49:37,341 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 19:49:37,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:49:37,401 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2023-11-21 19:49:37,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:49:37,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-11-21 19:49:37,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:49:37,402 INFO L225 Difference]: With dead ends: 70 [2023-11-21 19:49:37,403 INFO L226 Difference]: Without dead ends: 69 [2023-11-21 19:49:37,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:49:37,404 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:49:37,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 48 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:49:37,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-21 19:49:37,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-21 19:49:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 60 states have internal predecessors, (70), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 19:49:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2023-11-21 19:49:37,417 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 30 [2023-11-21 19:49:37,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:49:37,417 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2023-11-21 19:49:37,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 19:49:37,418 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2023-11-21 19:49:37,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 19:49:37,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:49:37,419 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:49:37,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 19:49:37,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 19:49:37,644 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-11-21 19:49:37,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:49:37,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1818514670, now seen corresponding path program 1 times [2023-11-21 19:49:37,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:49:37,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118146992] [2023-11-21 19:49:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:49:37,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:49:37,659 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:49:37,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327936036] [2023-11-21 19:49:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:49:37,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:49:37,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:49:37,661 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:49:37,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 19:49:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:49:37,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-21 19:49:37,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:49:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:49:37,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:49:40,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:49:40,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118146992] [2023-11-21 19:49:40,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:49:40,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327936036] [2023-11-21 19:49:40,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327936036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:49:40,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1558764850] [2023-11-21 19:49:40,383 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-21 19:49:40,383 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:49:40,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:49:40,384 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:49:40,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:49:44,049 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 123 for LOIs [2023-11-21 19:49:44,242 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-21 19:49:44,243 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:49:53,032 WARN L293 SmtUtils]: Spent 8.55s on a formula simplification. DAG size of input: 105 DAG size of output: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-21 19:50:02,589 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1599#(and (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_41| Int)) (and (<= (div |v_ULTIMATE.start_main_~y~0#1_41| 2) 9223372036854775807) (or (< |v_ULTIMATE.start_main_~y~0#1_41| 0) (not (= (mod |v_ULTIMATE.start_main_~y~0#1_41| 2) 1))) (or (and (= (+ (div |v_ULTIMATE.start_main_~y~0#1_41| 2) 1) |ULTIMATE.start_main_~y~0#1|) (not (= (mod |v_ULTIMATE.start_main_~y~0#1_41| 2) 0))) (and (= (mod |v_ULTIMATE.start_main_~y~0#1_41| 2) 0) (= |ULTIMATE.start_main_~y~0#1| (div |v_ULTIMATE.start_main_~y~0#1_41| 2)))) (or (and (= (+ 9223372036854775809 (div |v_ULTIMATE.start_main_~y~0#1_41| 2)) 0) (not (= (mod |v_ULTIMATE.start_main_~y~0#1_41| 2) 0))) (< 0 (+ 9223372036854775809 (div |v_ULTIMATE.start_main_~y~0#1_41| 2)))))) (<= 0 (+ (div (* (- 1) |ULTIMATE.start_main_~x~0#1|) 2) 4611686018427387903)) (<= (div (* (- 1) |ULTIMATE.start_main_~x~0#1|) 2) 4611686018427387904) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0) (<= |ULTIMATE.start_main_~a~0#1| 20) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= (+ 9223372036854775809 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) 0))' at error location [2023-11-21 19:50:02,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:50:02,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:50:02,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-21 19:50:02,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518714813] [2023-11-21 19:50:02,590 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 19:50:02,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 19:50:02,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:50:02,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 19:50:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2023-11-21 19:50:02,594 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 19:50:02,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:50:02,897 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2023-11-21 19:50:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:50:02,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2023-11-21 19:50:02,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:50:02,899 INFO L225 Difference]: With dead ends: 85 [2023-11-21 19:50:02,899 INFO L226 Difference]: Without dead ends: 82 [2023-11-21 19:50:02,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2023-11-21 19:50:02,902 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 89 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:50:02,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 43 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:50:02,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-21 19:50:02,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 50. [2023-11-21 19:50:02,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 42 states have internal predecessors, (45), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 19:50:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2023-11-21 19:50:02,914 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 30 [2023-11-21 19:50:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:50:02,915 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2023-11-21 19:50:02,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 19:50:02,916 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2023-11-21 19:50:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 19:50:02,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:50:02,917 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:50:02,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-21 19:50:03,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:50:03,131 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-11-21 19:50:03,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:50:03,132 INFO L85 PathProgramCache]: Analyzing trace with hash -539379872, now seen corresponding path program 1 times [2023-11-21 19:50:03,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:50:03,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967944117] [2023-11-21 19:50:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:03,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:50:03,145 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:50:03,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565665678] [2023-11-21 19:50:03,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:03,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:50:03,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:50:03,147 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:50:03,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 19:50:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:50:03,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-21 19:50:03,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:50:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:50:03,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:50:04,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:50:04,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967944117] [2023-11-21 19:50:04,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:50:04,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565665678] [2023-11-21 19:50:04,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565665678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:50:04,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098490286] [2023-11-21 19:50:04,253 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-21 19:50:04,253 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:50:04,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:50:04,254 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:50:04,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:50:07,346 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 123 for LOIs [2023-11-21 19:50:07,442 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-21 19:50:07,444 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:50:17,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1915#(and (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (<= 0 (+ (div (* (- 1) |ULTIMATE.start_main_~x~0#1|) 2) 4611686018427387903)) (exists ((|v_ULTIMATE.start_main_~y~0#1_47| Int)) (and (or (and (= (mod |v_ULTIMATE.start_main_~y~0#1_47| 2) 0) (= (div |v_ULTIMATE.start_main_~y~0#1_47| 2) |ULTIMATE.start_main_~y~0#1|)) (and (= (+ (div |v_ULTIMATE.start_main_~y~0#1_47| 2) 1) |ULTIMATE.start_main_~y~0#1|) (not (= (mod |v_ULTIMATE.start_main_~y~0#1_47| 2) 0)))) (or (< |v_ULTIMATE.start_main_~y~0#1_47| 0) (not (= (mod |v_ULTIMATE.start_main_~y~0#1_47| 2) 1))) (or (= 9223372036854775807 (div |v_ULTIMATE.start_main_~y~0#1_47| 2)) (< (div |v_ULTIMATE.start_main_~y~0#1_47| 2) 9223372036854775807)) (or (< 0 (+ 9223372036854775809 (div |v_ULTIMATE.start_main_~y~0#1_47| 2))) (and (not (= (mod |v_ULTIMATE.start_main_~y~0#1_47| 2) 0)) (= (+ 9223372036854775809 (div |v_ULTIMATE.start_main_~y~0#1_47| 2)) 0))))) (<= (div (* (- 1) |ULTIMATE.start_main_~x~0#1|) 2) 4611686018427387904) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 9223372036854775808 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1|))' at error location [2023-11-21 19:50:17,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:50:17,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:50:17,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-21 19:50:17,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111715997] [2023-11-21 19:50:17,264 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 19:50:17,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 19:50:17,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:50:17,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 19:50:17,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=876, Unknown=1, NotChecked=0, Total=1056 [2023-11-21 19:50:17,267 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 11 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 19:50:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:50:17,767 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2023-11-21 19:50:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 19:50:17,768 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2023-11-21 19:50:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:50:17,769 INFO L225 Difference]: With dead ends: 76 [2023-11-21 19:50:17,769 INFO L226 Difference]: Without dead ends: 74 [2023-11-21 19:50:17,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=250, Invalid=1231, Unknown=1, NotChecked=0, Total=1482 [2023-11-21 19:50:17,772 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 80 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:50:17,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 64 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:50:17,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-21 19:50:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2023-11-21 19:50:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.22) internal successors, (61), 55 states have internal predecessors, (61), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 19:50:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2023-11-21 19:50:17,785 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 31 [2023-11-21 19:50:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:50:17,786 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2023-11-21 19:50:17,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 19:50:17,786 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2023-11-21 19:50:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 19:50:17,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:50:17,787 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:50:17,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 19:50:18,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:50:18,001 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-11-21 19:50:18,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:50:18,002 INFO L85 PathProgramCache]: Analyzing trace with hash 459093204, now seen corresponding path program 1 times [2023-11-21 19:50:18,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:50:18,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311420763] [2023-11-21 19:50:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:18,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:50:18,015 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:50:18,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557823204] [2023-11-21 19:50:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:18,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:50:18,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:50:18,017 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:50:18,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 19:50:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:50:18,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:50:18,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:50:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 19:50:18,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:50:18,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:50:18,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311420763] [2023-11-21 19:50:18,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:50:18,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557823204] [2023-11-21 19:50:18,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557823204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:50:18,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:50:18,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:50:18,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364703183] [2023-11-21 19:50:18,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:50:18,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:50:18,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:50:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:50:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:50:18,127 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 19:50:18,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:50:18,194 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2023-11-21 19:50:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:50:18,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-11-21 19:50:18,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:50:18,195 INFO L225 Difference]: With dead ends: 88 [2023-11-21 19:50:18,196 INFO L226 Difference]: Without dead ends: 87 [2023-11-21 19:50:18,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:50:18,197 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:50:18,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 47 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:50:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-21 19:50:18,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2023-11-21 19:50:18,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-21 19:50:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2023-11-21 19:50:18,211 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 32 [2023-11-21 19:50:18,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:50:18,212 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2023-11-21 19:50:18,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 19:50:18,212 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2023-11-21 19:50:18,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-21 19:50:18,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:50:18,213 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:50:18,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 19:50:18,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:50:18,419 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-11-21 19:50:18,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:50:18,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1346987490, now seen corresponding path program 1 times [2023-11-21 19:50:18,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:50:18,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701284237] [2023-11-21 19:50:18,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:18,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:50:18,434 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:50:18,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841914011] [2023-11-21 19:50:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:18,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:50:18,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:50:18,439 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:50:18,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 19:50:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:50:18,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:50:18,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:50:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 19:50:18,556 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:50:18,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:50:18,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701284237] [2023-11-21 19:50:18,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:50:18,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841914011] [2023-11-21 19:50:18,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841914011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:50:18,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:50:18,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:50:18,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334426839] [2023-11-21 19:50:18,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:50:18,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:50:18,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:50:18,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:50:18,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:50:18,563 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 19:50:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:50:18,623 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2023-11-21 19:50:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:50:18,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2023-11-21 19:50:18,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:50:18,628 INFO L225 Difference]: With dead ends: 87 [2023-11-21 19:50:18,629 INFO L226 Difference]: Without dead ends: 86 [2023-11-21 19:50:18,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:50:18,630 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:50:18,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 52 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:50:18,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-21 19:50:18,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2023-11-21 19:50:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 70 states have internal predecessors, (77), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-21 19:50:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2023-11-21 19:50:18,655 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 33 [2023-11-21 19:50:18,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:50:18,656 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2023-11-21 19:50:18,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 19:50:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2023-11-21 19:50:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-21 19:50:18,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:50:18,661 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:50:18,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 19:50:18,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 19:50:18,884 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-11-21 19:50:18,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:50:18,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1635458586, now seen corresponding path program 1 times [2023-11-21 19:50:18,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:50:18,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682619182] [2023-11-21 19:50:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:18,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:50:18,903 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:50:18,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529000774] [2023-11-21 19:50:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:18,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:50:18,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:50:18,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:50:18,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 19:50:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:50:18,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-21 19:50:18,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:50:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:50:19,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:50:20,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:50:20,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682619182] [2023-11-21 19:50:20,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:50:20,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529000774] [2023-11-21 19:50:20,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529000774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:50:20,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467827507] [2023-11-21 19:50:20,283 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-11-21 19:50:20,283 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:50:20,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:50:20,284 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:50:20,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:50:21,553 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-11-21 19:50:21,587 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-21 19:50:21,589 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:50:24,897 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2896#(and (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~z~0#1| 20) (<= 1 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 9223372036854775808 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 40) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 0 |ULTIMATE.start_main_~z~0#1|))' at error location [2023-11-21 19:50:24,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:50:24,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:50:24,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-21 19:50:24,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280247175] [2023-11-21 19:50:24,898 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 19:50:24,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 19:50:24,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:50:24,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 19:50:24,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2023-11-21 19:50:24,900 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 19:50:25,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:50:25,476 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2023-11-21 19:50:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 19:50:25,476 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2023-11-21 19:50:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:50:25,477 INFO L225 Difference]: With dead ends: 104 [2023-11-21 19:50:25,477 INFO L226 Difference]: Without dead ends: 102 [2023-11-21 19:50:25,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=395, Invalid=1411, Unknown=0, NotChecked=0, Total=1806 [2023-11-21 19:50:25,479 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 75 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:50:25,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 80 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:50:25,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-21 19:50:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2023-11-21 19:50:25,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 83 states have internal predecessors, (93), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-21 19:50:25,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2023-11-21 19:50:25,494 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 35 [2023-11-21 19:50:25,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:50:25,495 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2023-11-21 19:50:25,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 19:50:25,495 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2023-11-21 19:50:25,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-21 19:50:25,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:50:25,496 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:50:25,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-21 19:50:25,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:50:25,711 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-11-21 19:50:25,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:50:25,712 INFO L85 PathProgramCache]: Analyzing trace with hash 840391438, now seen corresponding path program 1 times [2023-11-21 19:50:25,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:50:25,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723926886] [2023-11-21 19:50:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:25,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:50:25,722 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:50:25,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712366196] [2023-11-21 19:50:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:25,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:50:25,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:50:25,724 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:50:25,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9d14bf7-7c27-40a3-8167-e500d610dd40/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-21 19:50:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:50:25,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 19:50:25,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:50:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:50:25,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:50:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:50:26,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:50:26,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723926886] [2023-11-21 19:50:26,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:50:26,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712366196] [2023-11-21 19:50:26,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712366196] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:50:26,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [72478952] [2023-11-21 19:50:26,005 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-11-21 19:50:26,005 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:50:26,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:50:26,006 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:50:26,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs