./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire --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 deafb53b6c5560bead535ea0c1ac7bb85be5c959b9a13b21177e05987440264a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:55,124 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:55,250 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-23 20:36:55,255 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:55,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:55,290 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:55,291 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:55,291 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:55,292 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:55,293 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:55,293 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:55,294 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:55,294 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:55,295 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:36:55,295 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:55,296 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:55,296 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:36:55,297 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:36:55,298 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:55,298 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:36:55,299 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:36:55,303 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:36:55,304 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:55,305 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:36:55,309 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:36:55,310 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:55,310 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:36:55,311 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:55,311 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:36:55,311 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:55,313 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:36:55,313 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 20:36:55,313 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 20:36:55,314 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:36:55,314 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:36:55,314 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:55,315 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:55,315 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:55,315 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:55,316 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:55,316 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:55,316 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:55,317 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:36:55,317 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:36:55,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:36:55,318 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:55,318 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:36:55,318 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:55,318 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:55,318 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_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> deafb53b6c5560bead535ea0c1ac7bb85be5c959b9a13b21177e05987440264a [2023-11-23 20:36:55,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:55,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:55,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:55,643 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:55,643 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:55,645 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound2.c [2023-11-23 20:36:58,784 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:59,094 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:59,095 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound2.c [2023-11-23 20:36:59,104 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/data/77bb489d5/6935a61f04ad49b99c593893cf89184b/FLAG307c70807 [2023-11-23 20:36:59,121 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/data/77bb489d5/6935a61f04ad49b99c593893cf89184b [2023-11-23 20:36:59,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:59,131 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:59,135 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:59,136 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:59,140 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:59,141 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:59" (1/1) ... [2023-11-23 20:36:59,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e7d1089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:59, skipping insertion in model container [2023-11-23 20:36:59,143 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:59" (1/1) ... [2023-11-23 20:36:59,169 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:59,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:59,359 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:59,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:59,400 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:59,400 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:59 WrapperNode [2023-11-23 20:36:59,400 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:59,402 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:59,402 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:59,402 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:59,411 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:59" (1/1) ... [2023-11-23 20:36:59,432 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:59" (1/1) ... [2023-11-23 20:36:59,462 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2023-11-23 20:36:59,463 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:59,464 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:59,464 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:59,464 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:59,476 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:59" (1/1) ... [2023-11-23 20:36:59,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:59" (1/1) ... [2023-11-23 20:36:59,479 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:59" (1/1) ... [2023-11-23 20:36:59,480 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:59" (1/1) ... [2023-11-23 20:36:59,494 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:59" (1/1) ... [2023-11-23 20:36:59,511 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:59" (1/1) ... [2023-11-23 20:36:59,513 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:59" (1/1) ... [2023-11-23 20:36:59,514 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:59" (1/1) ... [2023-11-23 20:36:59,517 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:59,518 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:59,518 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:59,518 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:59,519 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:59" (1/1) ... [2023-11-23 20:36:59,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:59,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:59,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:59,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:59,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:36:59,622 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:36:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:36:59,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:59,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:59,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 20:36:59,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 20:36:59,706 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:59,711 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:37:00,198 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:37:00,243 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:37:00,244 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:37:00,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:00 BoogieIcfgContainer [2023-11-23 20:37:00,246 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:37:00,249 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:37:00,249 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:37:00,258 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:37:00,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:59" (1/3) ... [2023-11-23 20:37:00,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dba21f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:00, skipping insertion in model container [2023-11-23 20:37:00,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:59" (2/3) ... [2023-11-23 20:37:00,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dba21f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:00, skipping insertion in model container [2023-11-23 20:37:00,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:00" (3/3) ... [2023-11-23 20:37:00,266 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound2.c [2023-11-23 20:37:00,287 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:37:00,287 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-11-23 20:37:00,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:37:00,343 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;@5473c5e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:37:00,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-11-23 20:37:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 53 states have (on average 1.8867924528301887) internal successors, (100), 95 states have internal predecessors, (100), 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) [2023-11-23 20:37:00,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 20:37:00,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:00,360 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:00,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:00,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:00,372 INFO L85 PathProgramCache]: Analyzing trace with hash -849835587, now seen corresponding path program 1 times [2023-11-23 20:37:00,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:00,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801562407] [2023-11-23 20:37:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:00,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:00,495 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:00,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204471354] [2023-11-23 20:37:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:00,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:00,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:00,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:00,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:37:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:00,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 20:37:00,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:00,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:37:01,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:01,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801562407] [2023-11-23 20:37:01,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:01,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204471354] [2023-11-23 20:37:01,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204471354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:01,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1685648450] [2023-11-23 20:37:01,128 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:37:01,129 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:37:01,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:37:01,139 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:37:01,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:37:01,921 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-23 20:37:01,923 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:37:02,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1685648450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:02,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:02,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 13 [2023-11-23 20:37:02,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126969202] [2023-11-23 20:37:02,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:02,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 20:37:02,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:02,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 20:37:02,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-23 20:37:02,411 INFO L87 Difference]: Start difference. First operand has 104 states, 53 states have (on average 1.8867924528301887) internal successors, (100), 95 states have internal predecessors, (100), 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) 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) [2023-11-23 20:37:04,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 20:37:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:05,054 INFO L93 Difference]: Finished difference Result 159 states and 183 transitions. [2023-11-23 20:37:05,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 20:37:05,057 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 [2023-11-23 20:37:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:05,068 INFO L225 Difference]: With dead ends: 159 [2023-11-23 20:37:05,068 INFO L226 Difference]: Without dead ends: 119 [2023-11-23 20:37:05,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-23 20:37:05,075 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 378 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:05,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 131 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 206 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-11-23 20:37:05,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-23 20:37:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-11-23 20:37:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 73 states have (on average 1.6027397260273972) internal successors, (117), 110 states have internal predecessors, (117), 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) [2023-11-23 20:37:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2023-11-23 20:37:05,133 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 14 [2023-11-23 20:37:05,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:05,134 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2023-11-23 20:37:05,135 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) [2023-11-23 20:37:05,135 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2023-11-23 20:37:05,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 20:37:05,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:05,137 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] [2023-11-23 20:37:05,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 20:37:05,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 20:37:05,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:05,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:05,353 INFO L85 PathProgramCache]: Analyzing trace with hash -627355117, now seen corresponding path program 1 times [2023-11-23 20:37:05,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:05,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454364336] [2023-11-23 20:37:05,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:05,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:05,382 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:05,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519881015] [2023-11-23 20:37:05,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:05,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:05,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:05,384 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:05,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:37:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:05,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:37:05,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:05,528 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:05,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:05,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454364336] [2023-11-23 20:37:05,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:05,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519881015] [2023-11-23 20:37:05,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519881015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:05,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:05,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:37:05,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538700995] [2023-11-23 20:37:05,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:05,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:37:05,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:05,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:37:05,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:05,533 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2023-11-23 20:37:06,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:06,259 INFO L93 Difference]: Finished difference Result 297 states and 326 transitions. [2023-11-23 20:37:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:37:06,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 29 [2023-11-23 20:37:06,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:06,263 INFO L225 Difference]: With dead ends: 297 [2023-11-23 20:37:06,263 INFO L226 Difference]: Without dead ends: 208 [2023-11-23 20:37:06,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:37:06,265 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 234 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:06,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 123 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:37:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-23 20:37:06,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 161. [2023-11-23 20:37:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 114 states have (on average 1.6578947368421053) internal successors, (189), 150 states have internal predecessors, (189), 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) [2023-11-23 20:37:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 205 transitions. [2023-11-23 20:37:06,292 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 205 transitions. Word has length 29 [2023-11-23 20:37:06,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:06,293 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 205 transitions. [2023-11-23 20:37:06,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2023-11-23 20:37:06,294 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 205 transitions. [2023-11-23 20:37:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 20:37:06,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:06,295 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] [2023-11-23 20:37:06,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:06,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:06,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:06,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:06,513 INFO L85 PathProgramCache]: Analyzing trace with hash 2040218986, now seen corresponding path program 1 times [2023-11-23 20:37:06,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:06,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66980765] [2023-11-23 20:37:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:06,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:06,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:06,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123595288] [2023-11-23 20:37:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:06,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:06,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:06,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:37:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:06,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:37:06,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:06,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:06,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:06,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66980765] [2023-11-23 20:37:06,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:06,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123595288] [2023-11-23 20:37:06,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123595288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:06,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:06,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:06,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800453920] [2023-11-23 20:37:06,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:06,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:06,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:06,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:06,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:06,708 INFO L87 Difference]: Start difference. First operand 161 states and 205 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-11-23 20:37:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:07,174 INFO L93 Difference]: Finished difference Result 218 states and 266 transitions. [2023-11-23 20:37:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:07,175 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), 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 30 [2023-11-23 20:37:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:07,178 INFO L225 Difference]: With dead ends: 218 [2023-11-23 20:37:07,178 INFO L226 Difference]: Without dead ends: 215 [2023-11-23 20:37:07,178 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 [2023-11-23 20:37:07,180 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 175 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:07,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 94 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:37:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-23 20:37:07,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 186. [2023-11-23 20:37:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 138 states have (on average 1.6666666666666667) internal successors, (230), 174 states have internal predecessors, (230), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-23 20:37:07,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 248 transitions. [2023-11-23 20:37:07,209 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 248 transitions. Word has length 30 [2023-11-23 20:37:07,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:07,210 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 248 transitions. [2023-11-23 20:37:07,210 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), 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) [2023-11-23 20:37:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 248 transitions. [2023-11-23 20:37:07,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 20:37:07,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:07,212 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] [2023-11-23 20:37:07,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:07,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:07,434 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:07,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:07,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2026827932, now seen corresponding path program 1 times [2023-11-23 20:37:07,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:07,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414511814] [2023-11-23 20:37:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:07,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:07,453 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:07,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034149190] [2023-11-23 20:37:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:07,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:07,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:07,455 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:07,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:37:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:07,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:37:07,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:07,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:07,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414511814] [2023-11-23 20:37:07,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034149190] [2023-11-23 20:37:07,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034149190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:07,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:07,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:37:07,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210178296] [2023-11-23 20:37:07,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:07,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:37:07,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:07,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:37:07,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:07,596 INFO L87 Difference]: Start difference. First operand 186 states and 248 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2023-11-23 20:37:07,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:07,858 INFO L93 Difference]: Finished difference Result 308 states and 385 transitions. [2023-11-23 20:37:07,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:37:07,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 30 [2023-11-23 20:37:07,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:07,860 INFO L225 Difference]: With dead ends: 308 [2023-11-23 20:37:07,861 INFO L226 Difference]: Without dead ends: 220 [2023-11-23 20:37:07,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:37:07,863 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 185 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:07,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 91 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:37:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-23 20:37:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 195. [2023-11-23 20:37:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 149 states have (on average 1.6442953020134228) internal successors, (245), 182 states have internal predecessors, (245), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-23 20:37:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 265 transitions. [2023-11-23 20:37:07,887 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 265 transitions. Word has length 30 [2023-11-23 20:37:07,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:07,887 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 265 transitions. [2023-11-23 20:37:07,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2023-11-23 20:37:07,888 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 265 transitions. [2023-11-23 20:37:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 20:37:07,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:07,889 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, 1] [2023-11-23 20:37:07,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:08,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:08,110 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:08,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:08,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1164329724, now seen corresponding path program 1 times [2023-11-23 20:37:08,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:08,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873349676] [2023-11-23 20:37:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:08,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:08,134 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:08,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521996848] [2023-11-23 20:37:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:08,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:08,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:08,143 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:08,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:37:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:08,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:37:08,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:08,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:08,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:08,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873349676] [2023-11-23 20:37:08,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:08,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521996848] [2023-11-23 20:37:08,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521996848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:08,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:08,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:08,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644671282] [2023-11-23 20:37:08,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:08,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:08,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:08,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:08,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:08,319 INFO L87 Difference]: Start difference. First operand 195 states and 265 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) [2023-11-23 20:37:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:08,835 INFO L93 Difference]: Finished difference Result 255 states and 330 transitions. [2023-11-23 20:37:08,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:08,835 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 31 [2023-11-23 20:37:08,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:08,837 INFO L225 Difference]: With dead ends: 255 [2023-11-23 20:37:08,837 INFO L226 Difference]: Without dead ends: 249 [2023-11-23 20:37:08,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:08,839 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 153 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:08,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 92 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:37:08,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-11-23 20:37:08,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 223. [2023-11-23 20:37:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 176 states have (on average 1.6306818181818181) internal successors, (287), 209 states have internal predecessors, (287), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 20:37:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 309 transitions. [2023-11-23 20:37:08,873 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 309 transitions. Word has length 31 [2023-11-23 20:37:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:08,876 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 309 transitions. [2023-11-23 20:37:08,877 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) [2023-11-23 20:37:08,877 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 309 transitions. [2023-11-23 20:37:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 20:37:08,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:08,882 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, 1] [2023-11-23 20:37:08,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-23 20:37:09,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:09,097 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:09,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:09,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1177720778, now seen corresponding path program 1 times [2023-11-23 20:37:09,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:09,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147839684] [2023-11-23 20:37:09,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:09,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:09,113 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:09,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523018406] [2023-11-23 20:37:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:09,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:09,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:09,115 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:09,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:37:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:09,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:37:09,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:09,282 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:09,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:09,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147839684] [2023-11-23 20:37:09,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:09,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523018406] [2023-11-23 20:37:09,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523018406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:09,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:09,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:09,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067967133] [2023-11-23 20:37:09,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:09,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:09,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:09,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:09,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:09,286 INFO L87 Difference]: Start difference. First operand 223 states and 309 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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) [2023-11-23 20:37:09,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:09,653 INFO L93 Difference]: Finished difference Result 324 states and 427 transitions. [2023-11-23 20:37:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:09,654 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), 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 31 [2023-11-23 20:37:09,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:09,656 INFO L225 Difference]: With dead ends: 324 [2023-11-23 20:37:09,657 INFO L226 Difference]: Without dead ends: 321 [2023-11-23 20:37:09,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:09,658 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 208 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:09,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 79 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:37:09,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-11-23 20:37:09,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 280. [2023-11-23 20:37:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 231 states have (on average 1.658008658008658) internal successors, (383), 264 states have internal predecessors, (383), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-23 20:37:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 409 transitions. [2023-11-23 20:37:09,684 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 409 transitions. Word has length 31 [2023-11-23 20:37:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:09,684 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 409 transitions. [2023-11-23 20:37:09,685 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), 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) [2023-11-23 20:37:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 409 transitions. [2023-11-23 20:37:09,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 20:37:09,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:09,686 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, 1, 1] [2023-11-23 20:37:09,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:09,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:09,908 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:09,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:09,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1734482963, now seen corresponding path program 1 times [2023-11-23 20:37:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:09,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208125871] [2023-11-23 20:37:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:09,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:09,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:09,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733954520] [2023-11-23 20:37:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:09,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:09,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:09,929 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:09,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:37:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:09,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:37:09,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:10,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:10,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:10,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208125871] [2023-11-23 20:37:10,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:10,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733954520] [2023-11-23 20:37:10,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733954520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:10,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:10,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:10,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42641205] [2023-11-23 20:37:10,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:10,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:10,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:10,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:10,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:10,080 INFO L87 Difference]: Start difference. First operand 280 states and 409 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-11-23 20:37:10,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:10,357 INFO L93 Difference]: Finished difference Result 316 states and 416 transitions. [2023-11-23 20:37:10,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:10,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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 [2023-11-23 20:37:10,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:10,361 INFO L225 Difference]: With dead ends: 316 [2023-11-23 20:37:10,361 INFO L226 Difference]: Without dead ends: 312 [2023-11-23 20:37:10,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:10,362 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 202 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:10,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 71 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:37:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-11-23 20:37:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 277. [2023-11-23 20:37:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 228 states have (on average 1.631578947368421) internal successors, (372), 261 states have internal predecessors, (372), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-23 20:37:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 398 transitions. [2023-11-23 20:37:10,394 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 398 transitions. Word has length 32 [2023-11-23 20:37:10,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:10,395 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 398 transitions. [2023-11-23 20:37:10,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-11-23 20:37:10,396 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 398 transitions. [2023-11-23 20:37:10,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 20:37:10,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:10,397 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, 1, 1] [2023-11-23 20:37:10,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:10,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:10,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:10,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:10,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2145361644, now seen corresponding path program 1 times [2023-11-23 20:37:10,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:10,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227587837] [2023-11-23 20:37:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:10,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:10,631 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:10,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689391984] [2023-11-23 20:37:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:10,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:10,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:10,633 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:10,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 20:37:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:10,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:10,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:10,735 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:10,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:10,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227587837] [2023-11-23 20:37:10,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:10,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689391984] [2023-11-23 20:37:10,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689391984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:10,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:10,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:10,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924291709] [2023-11-23 20:37:10,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:10,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:10,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:10,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:10,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:10,738 INFO L87 Difference]: Start difference. First operand 277 states and 398 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-11-23 20:37:11,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:11,000 INFO L93 Difference]: Finished difference Result 385 states and 523 transitions. [2023-11-23 20:37:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:11,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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 [2023-11-23 20:37:11,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:11,003 INFO L225 Difference]: With dead ends: 385 [2023-11-23 20:37:11,004 INFO L226 Difference]: Without dead ends: 384 [2023-11-23 20:37:11,004 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 [2023-11-23 20:37:11,005 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 62 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:11,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 200 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:37:11,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-11-23 20:37:11,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 310. [2023-11-23 20:37:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 260 states have (on average 1.6192307692307693) internal successors, (421), 293 states have internal predecessors, (421), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-23 20:37:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 449 transitions. [2023-11-23 20:37:11,034 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 449 transitions. Word has length 32 [2023-11-23 20:37:11,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:11,035 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 449 transitions. [2023-11-23 20:37:11,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-11-23 20:37:11,035 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 449 transitions. [2023-11-23 20:37:11,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 20:37:11,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:11,036 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, 1, 1, 1] [2023-11-23 20:37:11,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:11,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:11,257 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:11,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:11,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1815195802, now seen corresponding path program 1 times [2023-11-23 20:37:11,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:11,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769671580] [2023-11-23 20:37:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:11,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:11,279 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:11,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143269806] [2023-11-23 20:37:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:11,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:11,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:11,282 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:11,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 20:37:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:11,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:37:11,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:11,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:11,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:11,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769671580] [2023-11-23 20:37:11,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:11,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143269806] [2023-11-23 20:37:11,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143269806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:11,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:11,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:37:11,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939318443] [2023-11-23 20:37:11,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:11,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:37:11,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:11,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:37:11,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:37:11,540 INFO L87 Difference]: Start difference. First operand 310 states and 449 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 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) [2023-11-23 20:37:12,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:12,861 INFO L93 Difference]: Finished difference Result 512 states and 714 transitions. [2023-11-23 20:37:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:37:12,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 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 33 [2023-11-23 20:37:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:12,869 INFO L225 Difference]: With dead ends: 512 [2023-11-23 20:37:12,869 INFO L226 Difference]: Without dead ends: 505 [2023-11-23 20:37:12,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:37:12,874 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 625 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:12,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 50 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 20:37:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-11-23 20:37:12,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 437. [2023-11-23 20:37:12,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 382 states have (on average 1.6047120418848169) internal successors, (613), 415 states have internal predecessors, (613), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-23 20:37:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 651 transitions. [2023-11-23 20:37:12,912 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 651 transitions. Word has length 33 [2023-11-23 20:37:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:12,912 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 651 transitions. [2023-11-23 20:37:12,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 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) [2023-11-23 20:37:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 651 transitions. [2023-11-23 20:37:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 20:37:12,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:12,913 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, 1, 1, 1] [2023-11-23 20:37:12,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:13,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:13,128 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:13,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2065603110, now seen corresponding path program 1 times [2023-11-23 20:37:13,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:13,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359831789] [2023-11-23 20:37:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:13,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:13,139 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:13,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780212104] [2023-11-23 20:37:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:13,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:13,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:13,143 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:13,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 20:37:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:13,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:13,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:13,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:13,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:13,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359831789] [2023-11-23 20:37:13,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:13,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780212104] [2023-11-23 20:37:13,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780212104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:13,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:13,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:13,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733164042] [2023-11-23 20:37:13,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:13,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:13,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:13,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:13,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:13,239 INFO L87 Difference]: Start difference. First operand 437 states and 651 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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) [2023-11-23 20:37:13,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:13,488 INFO L93 Difference]: Finished difference Result 495 states and 701 transitions. [2023-11-23 20:37:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:13,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 [2023-11-23 20:37:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:13,493 INFO L225 Difference]: With dead ends: 495 [2023-11-23 20:37:13,493 INFO L226 Difference]: Without dead ends: 494 [2023-11-23 20:37:13,494 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 [2023-11-23 20:37:13,494 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 58 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:13,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 181 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:37:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-11-23 20:37:13,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 448. [2023-11-23 20:37:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 393 states have (on average 1.5954198473282444) internal successors, (627), 426 states have internal predecessors, (627), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-23 20:37:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 665 transitions. [2023-11-23 20:37:13,536 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 665 transitions. Word has length 33 [2023-11-23 20:37:13,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:13,536 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 665 transitions. [2023-11-23 20:37:13,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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) [2023-11-23 20:37:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 665 transitions. [2023-11-23 20:37:13,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 20:37:13,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:13,537 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, 1, 1, 1] [2023-11-23 20:37:13,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:13,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:13,745 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:13,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:13,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2081701624, now seen corresponding path program 1 times [2023-11-23 20:37:13,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:13,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729809130] [2023-11-23 20:37:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:13,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:13,772 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:13,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730500128] [2023-11-23 20:37:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:13,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:13,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:13,773 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:13,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 20:37:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:13,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:13,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:13,869 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:13,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:13,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729809130] [2023-11-23 20:37:13,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:13,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730500128] [2023-11-23 20:37:13,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730500128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:13,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:13,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:13,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068387500] [2023-11-23 20:37:13,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:13,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:13,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:13,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:13,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:13,872 INFO L87 Difference]: Start difference. First operand 448 states and 665 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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) [2023-11-23 20:37:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:14,102 INFO L93 Difference]: Finished difference Result 494 states and 699 transitions. [2023-11-23 20:37:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:14,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 [2023-11-23 20:37:14,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:14,106 INFO L225 Difference]: With dead ends: 494 [2023-11-23 20:37:14,106 INFO L226 Difference]: Without dead ends: 493 [2023-11-23 20:37:14,107 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 [2023-11-23 20:37:14,107 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 53 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:14,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 201 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:37:14,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-11-23 20:37:14,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 450. [2023-11-23 20:37:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 395 states have (on average 1.5924050632911393) internal successors, (629), 428 states have internal predecessors, (629), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-23 20:37:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 667 transitions. [2023-11-23 20:37:14,142 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 667 transitions. Word has length 33 [2023-11-23 20:37:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:14,142 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 667 transitions. [2023-11-23 20:37:14,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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) [2023-11-23 20:37:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 667 transitions. [2023-11-23 20:37:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 20:37:14,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:14,144 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, 1, 1, 1, 1] [2023-11-23 20:37:14,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:14,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:14,365 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:14,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:14,366 INFO L85 PathProgramCache]: Analyzing trace with hash -436494883, now seen corresponding path program 1 times [2023-11-23 20:37:14,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:14,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543952130] [2023-11-23 20:37:14,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:14,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:14,375 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:14,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652385451] [2023-11-23 20:37:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:14,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:14,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:14,383 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:14,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 20:37:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:14,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:37:14,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:14,593 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:14,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:14,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543952130] [2023-11-23 20:37:14,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:14,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652385451] [2023-11-23 20:37:14,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652385451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:14,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:14,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:37:14,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550380737] [2023-11-23 20:37:14,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:14,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:37:14,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:37:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:37:14,596 INFO L87 Difference]: Start difference. First operand 450 states and 667 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-23 20:37:15,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:15,122 INFO L93 Difference]: Finished difference Result 479 states and 702 transitions. [2023-11-23 20:37:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:37:15,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 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 34 [2023-11-23 20:37:15,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:15,127 INFO L225 Difference]: With dead ends: 479 [2023-11-23 20:37:15,127 INFO L226 Difference]: Without dead ends: 474 [2023-11-23 20:37:15,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:37:15,128 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 254 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:15,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 45 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:37:15,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2023-11-23 20:37:15,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 445. [2023-11-23 20:37:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 395 states have (on average 1.5443037974683544) internal successors, (610), 423 states have internal predecessors, (610), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-23 20:37:15,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 648 transitions. [2023-11-23 20:37:15,164 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 648 transitions. Word has length 34 [2023-11-23 20:37:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:15,165 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 648 transitions. [2023-11-23 20:37:15,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-23 20:37:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 648 transitions. [2023-11-23 20:37:15,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 20:37:15,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:15,166 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, 1, 1, 1, 1] [2023-11-23 20:37:15,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:15,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:15,380 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:15,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:15,381 INFO L85 PathProgramCache]: Analyzing trace with hash -390812913, now seen corresponding path program 1 times [2023-11-23 20:37:15,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:15,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322162186] [2023-11-23 20:37:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:15,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:15,393 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:15,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108908182] [2023-11-23 20:37:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:15,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:15,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:15,400 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:15,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 20:37:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:15,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:15,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:15,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:15,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:15,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322162186] [2023-11-23 20:37:15,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:15,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108908182] [2023-11-23 20:37:15,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108908182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:15,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:15,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:15,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757324254] [2023-11-23 20:37:15,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:15,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:15,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:15,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:15,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:15,500 INFO L87 Difference]: Start difference. First operand 445 states and 648 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2023-11-23 20:37:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:15,784 INFO L93 Difference]: Finished difference Result 483 states and 675 transitions. [2023-11-23 20:37:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:15,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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 34 [2023-11-23 20:37:15,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:15,788 INFO L225 Difference]: With dead ends: 483 [2023-11-23 20:37:15,788 INFO L226 Difference]: Without dead ends: 482 [2023-11-23 20:37:15,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:15,789 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 46 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:15,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 189 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:37:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-11-23 20:37:15,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 447. [2023-11-23 20:37:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 397 states have (on average 1.5415617128463477) internal successors, (612), 425 states have internal predecessors, (612), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-23 20:37:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 650 transitions. [2023-11-23 20:37:15,825 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 650 transitions. Word has length 34 [2023-11-23 20:37:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:15,825 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 650 transitions. [2023-11-23 20:37:15,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2023-11-23 20:37:15,826 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 650 transitions. [2023-11-23 20:37:15,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 20:37:15,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:15,826 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, 1, 1, 1, 1] [2023-11-23 20:37:15,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:16,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 20:37:16,040 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:16,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:16,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1600957952, now seen corresponding path program 1 times [2023-11-23 20:37:16,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:16,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364584272] [2023-11-23 20:37:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:16,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:16,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:16,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564594994] [2023-11-23 20:37:16,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:16,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:16,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:16,055 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:16,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 20:37:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:16,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 20:37:16,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:16,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:37:19,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:19,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364584272] [2023-11-23 20:37:19,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:19,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564594994] [2023-11-23 20:37:19,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564594994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:19,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1860353671] [2023-11-23 20:37:19,398 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-11-23 20:37:19,398 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:37:19,399 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:37:19,399 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:37:19,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:37:25,245 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-11-23 20:37:25,293 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-23 20:37:25,295 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:37:29,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1860353671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:29,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:29,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [9] total 26 [2023-11-23 20:37:29,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688850016] [2023-11-23 20:37:29,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:29,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 20:37:29,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:29,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 20:37:29,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2023-11-23 20:37:29,572 INFO L87 Difference]: Start difference. First operand 447 states and 650 transitions. Second operand has 19 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 20:37:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:31,202 INFO L93 Difference]: Finished difference Result 484 states and 674 transitions. [2023-11-23 20:37:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 20:37:31,203 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2023-11-23 20:37:31,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:31,206 INFO L225 Difference]: With dead ends: 484 [2023-11-23 20:37:31,206 INFO L226 Difference]: Without dead ends: 467 [2023-11-23 20:37:31,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 20:37:31,208 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 404 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:31,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 180 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 20:37:31,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-11-23 20:37:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 441. [2023-11-23 20:37:31,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 391 states have (on average 1.526854219948849) internal successors, (597), 419 states have internal predecessors, (597), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-23 20:37:31,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 635 transitions. [2023-11-23 20:37:31,243 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 635 transitions. Word has length 34 [2023-11-23 20:37:31,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:31,243 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 635 transitions. [2023-11-23 20:37:31,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 20:37:31,244 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 635 transitions. [2023-11-23 20:37:31,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 20:37:31,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:31,245 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, 1, 1, 1, 1, 1] [2023-11-23 20:37:31,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:31,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 20:37:31,466 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:31,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:31,466 INFO L85 PathProgramCache]: Analyzing trace with hash -939497798, now seen corresponding path program 1 times [2023-11-23 20:37:31,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:31,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734238522] [2023-11-23 20:37:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:31,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:31,480 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:31,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524186368] [2023-11-23 20:37:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:31,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:31,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:31,488 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:31,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 20:37:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:31,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 20:37:31,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:31,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:37:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:31,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:31,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734238522] [2023-11-23 20:37:31,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:31,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524186368] [2023-11-23 20:37:31,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524186368] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:37:31,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2059513370] [2023-11-23 20:37:31,916 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-11-23 20:37:31,916 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:37:31,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:37:31,917 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:37:31,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:37:33,442 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 85 for LOIs [2023-11-23 20:37:33,491 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-23 20:37:33,493 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:37:36,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2059513370] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:36,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:37:36,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 6] total 24 [2023-11-23 20:37:36,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022075484] [2023-11-23 20:37:36,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:36,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 20:37:36,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 20:37:36,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2023-11-23 20:37:36,012 INFO L87 Difference]: Start difference. First operand 441 states and 635 transitions. Second operand has 17 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 20:37:37,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:37,113 INFO L93 Difference]: Finished difference Result 461 states and 647 transitions. [2023-11-23 20:37:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 20:37:37,113 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2023-11-23 20:37:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:37,118 INFO L225 Difference]: With dead ends: 461 [2023-11-23 20:37:37,118 INFO L226 Difference]: Without dead ends: 446 [2023-11-23 20:37:37,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-23 20:37:37,122 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 323 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:37,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 152 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 20:37:37,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-11-23 20:37:37,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 435. [2023-11-23 20:37:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 385 states have (on average 1.5116883116883117) internal successors, (582), 413 states have internal predecessors, (582), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-23 20:37:37,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 620 transitions. [2023-11-23 20:37:37,159 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 620 transitions. Word has length 35 [2023-11-23 20:37:37,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:37,160 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 620 transitions. [2023-11-23 20:37:37,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 20:37:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 620 transitions. [2023-11-23 20:37:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 20:37:37,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:37,161 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, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:37,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:37,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 20:37:37,381 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:37,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:37,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1909053167, now seen corresponding path program 1 times [2023-11-23 20:37:37,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:37,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64684681] [2023-11-23 20:37:37,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:37,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:37,391 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:37,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550368068] [2023-11-23 20:37:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:37,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:37,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:37,393 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:37,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 20:37:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:37,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 20:37:37,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:37,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:37:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:37,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:37,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64684681] [2023-11-23 20:37:37,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:37,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550368068] [2023-11-23 20:37:37,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550368068] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:37:37,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [163088829] [2023-11-23 20:37:37,798 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-11-23 20:37:37,799 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:37:37,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:37:37,799 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:37:37,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:37:38,996 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 84 for LOIs [2023-11-23 20:37:39,044 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-23 20:37:39,046 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:37:41,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [163088829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:41,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:37:41,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7, 6] total 25 [2023-11-23 20:37:41,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875032] [2023-11-23 20:37:41,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:41,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 20:37:41,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:41,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 20:37:41,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2023-11-23 20:37:41,755 INFO L87 Difference]: Start difference. First operand 435 states and 620 transitions. Second operand has 18 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 20:37:42,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:42,828 INFO L93 Difference]: Finished difference Result 482 states and 659 transitions. [2023-11-23 20:37:42,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 20:37:42,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2023-11-23 20:37:42,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:42,831 INFO L225 Difference]: With dead ends: 482 [2023-11-23 20:37:42,832 INFO L226 Difference]: Without dead ends: 463 [2023-11-23 20:37:42,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2023-11-23 20:37:42,833 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 324 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:42,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 132 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 20:37:42,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-11-23 20:37:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 435. [2023-11-23 20:37:42,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 385 states have (on average 1.4883116883116883) internal successors, (573), 413 states have internal predecessors, (573), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-23 20:37:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 611 transitions. [2023-11-23 20:37:42,868 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 611 transitions. Word has length 36 [2023-11-23 20:37:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:42,869 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 611 transitions. [2023-11-23 20:37:42,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 20:37:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 611 transitions. [2023-11-23 20:37:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 20:37:42,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:42,870 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:42,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:43,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 20:37:43,091 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:43,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:43,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1542044970, now seen corresponding path program 1 times [2023-11-23 20:37:43,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:43,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134328018] [2023-11-23 20:37:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:43,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:43,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:43,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004083119] [2023-11-23 20:37:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:43,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:43,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:43,105 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:43,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 20:37:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:43,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:37:43,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:43,357 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:43,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:43,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134328018] [2023-11-23 20:37:43,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:43,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004083119] [2023-11-23 20:37:43,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004083119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:43,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:43,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:37:43,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924630178] [2023-11-23 20:37:43,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:43,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:37:43,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:43,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:37:43,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:37:43,361 INFO L87 Difference]: Start difference. First operand 435 states and 611 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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) [2023-11-23 20:37:44,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:44,128 INFO L93 Difference]: Finished difference Result 479 states and 636 transitions. [2023-11-23 20:37:44,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:37:44,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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 37 [2023-11-23 20:37:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:44,132 INFO L225 Difference]: With dead ends: 479 [2023-11-23 20:37:44,132 INFO L226 Difference]: Without dead ends: 476 [2023-11-23 20:37:44,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:37:44,133 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 264 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:44,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 55 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:37:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-11-23 20:37:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 435. [2023-11-23 20:37:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 385 states have (on average 1.4805194805194806) internal successors, (570), 413 states have internal predecessors, (570), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-23 20:37:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 608 transitions. [2023-11-23 20:37:44,181 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 608 transitions. Word has length 37 [2023-11-23 20:37:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:44,182 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 608 transitions. [2023-11-23 20:37:44,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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) [2023-11-23 20:37:44,182 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 608 transitions. [2023-11-23 20:37:44,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 20:37:44,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:44,183 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:44,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:44,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 20:37:44,404 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:44,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash 558753953, now seen corresponding path program 1 times [2023-11-23 20:37:44,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:44,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675641689] [2023-11-23 20:37:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:44,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:44,412 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:44,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640994734] [2023-11-23 20:37:44,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:44,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:44,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:44,413 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:44,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 20:37:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:44,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:37:44,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:44,638 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:44,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:44,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675641689] [2023-11-23 20:37:44,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:44,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640994734] [2023-11-23 20:37:44,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640994734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:44,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:44,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:37:44,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447179852] [2023-11-23 20:37:44,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:44,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:37:44,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:44,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:37:44,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:37:44,641 INFO L87 Difference]: Start difference. First operand 435 states and 608 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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) [2023-11-23 20:37:45,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:45,210 INFO L93 Difference]: Finished difference Result 497 states and 650 transitions. [2023-11-23 20:37:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:37:45,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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 38 [2023-11-23 20:37:45,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:45,213 INFO L225 Difference]: With dead ends: 497 [2023-11-23 20:37:45,213 INFO L226 Difference]: Without dead ends: 496 [2023-11-23 20:37:45,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:37:45,215 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 278 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:45,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 56 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:37:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-11-23 20:37:45,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 435. [2023-11-23 20:37:45,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 385 states have (on average 1.4753246753246754) internal successors, (568), 413 states have internal predecessors, (568), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-23 20:37:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 606 transitions. [2023-11-23 20:37:45,251 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 606 transitions. Word has length 38 [2023-11-23 20:37:45,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:45,251 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 606 transitions. [2023-11-23 20:37:45,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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) [2023-11-23 20:37:45,252 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 606 transitions. [2023-11-23 20:37:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 20:37:45,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:45,253 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:45,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:45,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:45,472 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:45,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash 141503500, now seen corresponding path program 1 times [2023-11-23 20:37:45,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:45,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597501591] [2023-11-23 20:37:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:45,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:45,482 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:45,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950723059] [2023-11-23 20:37:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:45,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:45,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:45,484 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:45,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 20:37:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:45,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:45,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:45,598 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:45,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:45,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597501591] [2023-11-23 20:37:45,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:45,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950723059] [2023-11-23 20:37:45,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950723059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:45,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:45,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:45,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183428831] [2023-11-23 20:37:45,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:45,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:45,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:45,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:45,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:45,601 INFO L87 Difference]: Start difference. First operand 435 states and 606 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 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) [2023-11-23 20:37:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:46,390 INFO L93 Difference]: Finished difference Result 467 states and 634 transitions. [2023-11-23 20:37:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:46,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 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 39 [2023-11-23 20:37:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:46,397 INFO L225 Difference]: With dead ends: 467 [2023-11-23 20:37:46,397 INFO L226 Difference]: Without dead ends: 466 [2023-11-23 20:37:46,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:46,398 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 27 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:46,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 170 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:37:46,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-11-23 20:37:46,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 446. [2023-11-23 20:37:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 396 states have (on average 1.4646464646464648) internal successors, (580), 424 states have internal predecessors, (580), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-23 20:37:46,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 618 transitions. [2023-11-23 20:37:46,443 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 618 transitions. Word has length 39 [2023-11-23 20:37:46,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:46,444 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 618 transitions. [2023-11-23 20:37:46,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 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) [2023-11-23 20:37:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 618 transitions. [2023-11-23 20:37:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 20:37:46,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:46,445 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:46,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:46,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:46,660 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:46,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:46,661 INFO L85 PathProgramCache]: Analyzing trace with hash 91641347, now seen corresponding path program 1 times [2023-11-23 20:37:46,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:46,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835867886] [2023-11-23 20:37:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:46,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:46,669 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:46,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928532732] [2023-11-23 20:37:46,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:46,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:46,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:46,672 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:46,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-23 20:37:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:46,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:46,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:46,765 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:46,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:46,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835867886] [2023-11-23 20:37:46,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:46,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928532732] [2023-11-23 20:37:46,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928532732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:46,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:46,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:46,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415596473] [2023-11-23 20:37:46,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:46,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:46,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:46,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:46,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:46,768 INFO L87 Difference]: Start difference. First operand 446 states and 618 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-11-23 20:37:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:47,598 INFO L93 Difference]: Finished difference Result 466 states and 632 transitions. [2023-11-23 20:37:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:47,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 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 40 [2023-11-23 20:37:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:47,602 INFO L225 Difference]: With dead ends: 466 [2023-11-23 20:37:47,602 INFO L226 Difference]: Without dead ends: 465 [2023-11-23 20:37:47,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:47,603 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 24 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:47,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 173 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:37:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-11-23 20:37:47,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 447. [2023-11-23 20:37:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 397 states have (on average 1.4609571788413098) internal successors, (580), 425 states have internal predecessors, (580), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-23 20:37:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 618 transitions. [2023-11-23 20:37:47,640 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 618 transitions. Word has length 40 [2023-11-23 20:37:47,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:47,641 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 618 transitions. [2023-11-23 20:37:47,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-11-23 20:37:47,641 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 618 transitions. [2023-11-23 20:37:47,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 20:37:47,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:47,642 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:47,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:47,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:47,856 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2023-11-23 20:37:47,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:47,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2126977275, now seen corresponding path program 1 times [2023-11-23 20:37:47,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:47,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580448316] [2023-11-23 20:37:47,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:47,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:47,866 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:47,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433986969] [2023-11-23 20:37:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:47,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:47,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:47,868 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:47,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9729717-fd58-4898-87a0-3651273e5df6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-23 20:37:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:47,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 20:37:47,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:48,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:37:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:49,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:49,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580448316] [2023-11-23 20:37:49,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:49,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433986969] [2023-11-23 20:37:49,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433986969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:37:49,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131474677] [2023-11-23 20:37:49,090 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-11-23 20:37:49,091 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:37:49,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:37:49,093 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:37:49,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs