./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/systemc/pc_sfifo_3.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/pc_sfifo_3.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 677126e8d6773c92cc337bfe0a3ec155f49f784424155f33a8c9c24ee0a42113 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:42:28,123 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:42:28,197 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-21 19:42:28,203 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:42:28,203 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:42:28,230 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:42:28,233 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:42:28,233 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:42:28,234 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:42:28,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:42:28,236 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:42:28,237 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:42:28,237 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:42:28,240 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:42:28,241 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:42:28,241 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:42:28,243 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:42:28,245 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:42:28,247 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:42:28,248 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:42:28,248 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:42:28,249 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:42:28,250 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:42:28,250 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:42:28,251 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:42:28,251 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:42:28,251 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:42:28,252 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:42:28,252 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:42:28,253 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:42:28,253 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:42:28,253 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-21 19:42:28,254 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 19:42:28,254 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:42:28,254 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:42:28,254 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:42:28,255 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:42:28,255 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:42:28,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:42:28,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:42:28,256 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:42:28,256 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:42:28,256 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:42:28,256 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:42:28,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:42:28,257 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:42:28,257 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:42:28,257 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:42:28,257 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:42:28,258 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_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 677126e8d6773c92cc337bfe0a3ec155f49f784424155f33a8c9c24ee0a42113 [2023-11-21 19:42:28,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:42:28,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:42:28,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:42:28,530 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:42:28,530 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:42:28,532 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/systemc/pc_sfifo_3.cil.c [2023-11-21 19:42:31,571 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:42:31,841 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:42:31,842 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/sv-benchmarks/c/systemc/pc_sfifo_3.cil.c [2023-11-21 19:42:31,853 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/data/dfd5142f2/485b1cfb1f454665a4413d1f7c5f88bb/FLAG9d297f35e [2023-11-21 19:42:31,867 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/data/dfd5142f2/485b1cfb1f454665a4413d1f7c5f88bb [2023-11-21 19:42:31,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:42:31,871 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:42:31,872 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:42:31,872 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:42:31,877 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:42:31,878 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:42:31" (1/1) ... [2023-11-21 19:42:31,880 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131490c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:42:31, skipping insertion in model container [2023-11-21 19:42:31,880 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:42:31" (1/1) ... [2023-11-21 19:42:31,929 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:42:32,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:42:32,197 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:42:32,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:42:32,266 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:42:32,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:42:32 WrapperNode [2023-11-21 19:42:32,266 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:42:32,268 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:42:32,268 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:42:32,269 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:42:32,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:42:32" (1/1) ... [2023-11-21 19:42:32,307 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:42:32" (1/1) ... [2023-11-21 19:42:32,337 INFO L138 Inliner]: procedures = 31, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 238 [2023-11-21 19:42:32,337 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:42:32,338 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:42:32,338 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:42:32,338 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:42:32,347 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:42:32" (1/1) ... [2023-11-21 19:42:32,347 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:42:32" (1/1) ... [2023-11-21 19:42:32,350 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:42:32" (1/1) ... [2023-11-21 19:42:32,350 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:42:32" (1/1) ... [2023-11-21 19:42:32,357 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:42:32" (1/1) ... [2023-11-21 19:42:32,362 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:42:32" (1/1) ... [2023-11-21 19:42:32,365 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:42:32" (1/1) ... [2023-11-21 19:42:32,366 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:42:32" (1/1) ... [2023-11-21 19:42:32,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:42:32,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:42:32,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:42:32,372 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:42:32,372 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:42:32" (1/1) ... [2023-11-21 19:42:32,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:42:32,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:42:32,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:42:32,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:42:32,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:42:32,451 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-21 19:42:32,451 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-21 19:42:32,451 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-21 19:42:32,451 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-21 19:42:32,452 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-21 19:42:32,452 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-21 19:42:32,452 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-21 19:42:32,452 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-21 19:42:32,452 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-21 19:42:32,453 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-21 19:42:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-21 19:42:32,453 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-21 19:42:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:42:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-21 19:42:32,454 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-21 19:42:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:42:32,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:42:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-21 19:42:32,454 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-21 19:42:32,550 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:42:32,552 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:42:32,893 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##54: assume !(1 == ~q_free~0); [2023-11-21 19:42:32,893 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##53: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2023-11-21 19:42:32,911 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:42:33,138 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:42:33,139 INFO L308 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-21 19:42:33,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:42:33 BoogieIcfgContainer [2023-11-21 19:42:33,142 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:42:33,147 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:42:33,148 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:42:33,151 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:42:33,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:42:31" (1/3) ... [2023-11-21 19:42:33,152 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d16991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:42:33, skipping insertion in model container [2023-11-21 19:42:33,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:42:32" (2/3) ... [2023-11-21 19:42:33,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d16991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:42:33, skipping insertion in model container [2023-11-21 19:42:33,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:42:33" (3/3) ... [2023-11-21 19:42:33,158 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil.c [2023-11-21 19:42:33,179 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:42:33,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-21 19:42:33,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:42:33,245 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;@353a4297, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:42:33,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-21 19:42:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 70 states have internal predecessors, (93), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-21 19:42:33,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-21 19:42:33,266 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:42:33,267 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-11-21 19:42:33,268 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 19:42:33,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:42:33,275 INFO L85 PathProgramCache]: Analyzing trace with hash -414104276, now seen corresponding path program 1 times [2023-11-21 19:42:33,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:42:33,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919055502] [2023-11-21 19:42:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:33,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:42:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:42:33,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:42:33,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919055502] [2023-11-21 19:42:33,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919055502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:42:33,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:42:33,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:42:33,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191223243] [2023-11-21 19:42:33,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:42:33,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:42:33,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:42:33,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:42:33,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:42:33,812 INFO L87 Difference]: Start difference. First operand has 92 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 70 states have internal predecessors, (93), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 4 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 19:42:34,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:42:34,138 INFO L93 Difference]: Finished difference Result 333 states and 461 transitions. [2023-11-21 19:42:34,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:42:34,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 4 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2023-11-21 19:42:34,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:42:34,153 INFO L225 Difference]: With dead ends: 333 [2023-11-21 19:42:34,153 INFO L226 Difference]: Without dead ends: 231 [2023-11-21 19:42:34,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:42:34,161 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 191 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:42:34,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 318 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:42:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-11-21 19:42:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 216. [2023-11-21 19:42:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 155 states have (on average 1.3935483870967742) internal successors, (216), 161 states have internal predecessors, (216), 34 states have call successors, (34), 21 states have call predecessors, (34), 21 states have return successors, (37), 34 states have call predecessors, (37), 34 states have call successors, (37) [2023-11-21 19:42:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 287 transitions. [2023-11-21 19:42:34,243 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 287 transitions. Word has length 41 [2023-11-21 19:42:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:42:34,244 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 287 transitions. [2023-11-21 19:42:34,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 4 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 19:42:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 287 transitions. [2023-11-21 19:42:34,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-21 19:42:34,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:42:34,247 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-11-21 19:42:34,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:42:34,248 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 19:42:34,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:42:34,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1550789214, now seen corresponding path program 1 times [2023-11-21 19:42:34,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:42:34,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203719676] [2023-11-21 19:42:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:34,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:42:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:42:34,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:42:34,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203719676] [2023-11-21 19:42:34,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203719676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:42:34,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:42:34,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:42:34,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780129318] [2023-11-21 19:42:34,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:42:34,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:42:34,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:42:34,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:42:34,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:42:34,368 INFO L87 Difference]: Start difference. First operand 216 states and 287 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 19:42:35,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:42:35,038 INFO L93 Difference]: Finished difference Result 823 states and 1089 transitions. [2023-11-21 19:42:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:42:35,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 42 [2023-11-21 19:42:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:42:35,045 INFO L225 Difference]: With dead ends: 823 [2023-11-21 19:42:35,045 INFO L226 Difference]: Without dead ends: 578 [2023-11-21 19:42:35,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:42:35,050 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 589 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:42:35,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 667 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:42:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-11-21 19:42:35,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 482. [2023-11-21 19:42:35,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 345 states have (on average 1.3159420289855073) internal successors, (454), 352 states have internal predecessors, (454), 76 states have call successors, (76), 51 states have call predecessors, (76), 55 states have return successors, (84), 79 states have call predecessors, (84), 76 states have call successors, (84) [2023-11-21 19:42:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 614 transitions. [2023-11-21 19:42:35,129 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 614 transitions. Word has length 42 [2023-11-21 19:42:35,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:42:35,130 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 614 transitions. [2023-11-21 19:42:35,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 19:42:35,130 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 614 transitions. [2023-11-21 19:42:35,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 19:42:35,132 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:42:35,132 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-11-21 19:42:35,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:42:35,133 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 19:42:35,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:42:35,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1962950267, now seen corresponding path program 1 times [2023-11-21 19:42:35,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:42:35,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26382468] [2023-11-21 19:42:35,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:35,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:42:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:42:35,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:42:35,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26382468] [2023-11-21 19:42:35,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26382468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:42:35,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:42:35,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 19:42:35,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799697311] [2023-11-21 19:42:35,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:42:35,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:42:35,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:42:35,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:42:35,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:42:35,481 INFO L87 Difference]: Start difference. First operand 482 states and 614 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 19:42:35,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:42:35,965 INFO L93 Difference]: Finished difference Result 1329 states and 1689 transitions. [2023-11-21 19:42:35,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 19:42:35,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 43 [2023-11-21 19:42:35,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:42:35,973 INFO L225 Difference]: With dead ends: 1329 [2023-11-21 19:42:35,973 INFO L226 Difference]: Without dead ends: 853 [2023-11-21 19:42:35,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-11-21 19:42:35,976 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 254 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:42:35,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 381 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:42:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2023-11-21 19:42:36,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 789. [2023-11-21 19:42:36,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 563 states have (on average 1.3019538188277087) internal successors, (733), 572 states have internal predecessors, (733), 126 states have call successors, (126), 86 states have call predecessors, (126), 94 states have return successors, (142), 131 states have call predecessors, (142), 126 states have call successors, (142) [2023-11-21 19:42:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1001 transitions. [2023-11-21 19:42:36,074 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1001 transitions. Word has length 43 [2023-11-21 19:42:36,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:42:36,075 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1001 transitions. [2023-11-21 19:42:36,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 19:42:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1001 transitions. [2023-11-21 19:42:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-21 19:42:36,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:42:36,077 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:42:36,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:42:36,078 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 19:42:36,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:42:36,079 INFO L85 PathProgramCache]: Analyzing trace with hash 169030052, now seen corresponding path program 1 times [2023-11-21 19:42:36,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:42:36,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576276590] [2023-11-21 19:42:36,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:36,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:42:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:42:36,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:42:36,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576276590] [2023-11-21 19:42:36,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576276590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:42:36,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:42:36,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:42:36,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046246847] [2023-11-21 19:42:36,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:42:36,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:42:36,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:42:36,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:42:36,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:42:36,128 INFO L87 Difference]: Start difference. First operand 789 states and 1001 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:42:36,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:42:36,262 INFO L93 Difference]: Finished difference Result 1509 states and 1931 transitions. [2023-11-21 19:42:36,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:42:36,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2023-11-21 19:42:36,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:42:36,268 INFO L225 Difference]: With dead ends: 1509 [2023-11-21 19:42:36,268 INFO L226 Difference]: Without dead ends: 725 [2023-11-21 19:42:36,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:42:36,272 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 83 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:42:36,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 187 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:42:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2023-11-21 19:42:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 605. [2023-11-21 19:42:36,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 427 states have (on average 1.2505854800936769) internal successors, (534), 431 states have internal predecessors, (534), 104 states have call successors, (104), 70 states have call predecessors, (104), 70 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-21 19:42:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 742 transitions. [2023-11-21 19:42:36,354 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 742 transitions. Word has length 44 [2023-11-21 19:42:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:42:36,355 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 742 transitions. [2023-11-21 19:42:36,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:42:36,356 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 742 transitions. [2023-11-21 19:42:36,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-21 19:42:36,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:42:36,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:42:36,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:42:36,359 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 19:42:36,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:42:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1886449081, now seen corresponding path program 1 times [2023-11-21 19:42:36,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:42:36,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284199442] [2023-11-21 19:42:36,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:36,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:42:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:42:36,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:42:36,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284199442] [2023-11-21 19:42:36,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284199442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:42:36,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:42:36,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 19:42:36,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141609452] [2023-11-21 19:42:36,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:42:36,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:42:36,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:42:36,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:42:36,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:42:36,555 INFO L87 Difference]: Start difference. First operand 605 states and 742 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-21 19:42:37,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:42:37,005 INFO L93 Difference]: Finished difference Result 1528 states and 1865 transitions. [2023-11-21 19:42:37,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 19:42:37,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2023-11-21 19:42:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:42:37,012 INFO L225 Difference]: With dead ends: 1528 [2023-11-21 19:42:37,012 INFO L226 Difference]: Without dead ends: 929 [2023-11-21 19:42:37,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-11-21 19:42:37,016 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 236 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:42:37,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 403 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:42:37,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2023-11-21 19:42:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 890. [2023-11-21 19:42:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 627 states have (on average 1.2360446570972887) internal successors, (775), 631 states have internal predecessors, (775), 154 states have call successors, (154), 105 states have call predecessors, (154), 105 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2023-11-21 19:42:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1083 transitions. [2023-11-21 19:42:37,153 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1083 transitions. Word has length 56 [2023-11-21 19:42:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:42:37,154 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1083 transitions. [2023-11-21 19:42:37,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-21 19:42:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1083 transitions. [2023-11-21 19:42:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 19:42:37,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:42:37,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:42:37,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:42:37,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 19:42:37,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:42:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash -156038160, now seen corresponding path program 1 times [2023-11-21 19:42:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:42:37,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171165564] [2023-11-21 19:42:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:37,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:42:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:42:37,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:42:37,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171165564] [2023-11-21 19:42:37,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171165564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:42:37,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:42:37,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:42:37,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991950892] [2023-11-21 19:42:37,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:42:37,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:42:37,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:42:37,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:42:37,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:42:37,268 INFO L87 Difference]: Start difference. First operand 890 states and 1083 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 4 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-21 19:42:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:42:37,583 INFO L93 Difference]: Finished difference Result 2196 states and 2709 transitions. [2023-11-21 19:42:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:42:37,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 4 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2023-11-21 19:42:37,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:42:37,592 INFO L225 Difference]: With dead ends: 2196 [2023-11-21 19:42:37,593 INFO L226 Difference]: Without dead ends: 1482 [2023-11-21 19:42:37,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:42:37,596 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 259 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:42:37,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 324 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:42:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2023-11-21 19:42:37,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1293. [2023-11-21 19:42:37,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 910 states have (on average 1.2263736263736265) internal successors, (1116), 914 states have internal predecessors, (1116), 223 states have call successors, (223), 156 states have call predecessors, (223), 156 states have return successors, (241), 223 states have call predecessors, (241), 223 states have call successors, (241) [2023-11-21 19:42:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1580 transitions. [2023-11-21 19:42:37,777 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1580 transitions. Word has length 57 [2023-11-21 19:42:37,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:42:37,778 INFO L495 AbstractCegarLoop]: Abstraction has 1293 states and 1580 transitions. [2023-11-21 19:42:37,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 4 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-21 19:42:37,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1580 transitions. [2023-11-21 19:42:37,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-21 19:42:37,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:42:37,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:42:37,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:42:37,780 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 19:42:37,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:42:37,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1649419514, now seen corresponding path program 1 times [2023-11-21 19:42:37,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:42:37,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169671668] [2023-11-21 19:42:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:37,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:42:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-21 19:42:38,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:42:38,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169671668] [2023-11-21 19:42:38,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169671668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:42:38,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503224623] [2023-11-21 19:42:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:38,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:42:38,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:42:38,130 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:42:38,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:42:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:38,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:42:38,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:42:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-21 19:42:38,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:42:38,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503224623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:42:38,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:42:38,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [14] total 15 [2023-11-21 19:42:38,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095307649] [2023-11-21 19:42:38,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:42:38,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:42:38,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:42:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:42:38,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-21 19:42:38,470 INFO L87 Difference]: Start difference. First operand 1293 states and 1580 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-21 19:42:38,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:42:38,619 INFO L93 Difference]: Finished difference Result 1293 states and 1580 transitions. [2023-11-21 19:42:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:42:38,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 74 [2023-11-21 19:42:38,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:42:38,628 INFO L225 Difference]: With dead ends: 1293 [2023-11-21 19:42:38,628 INFO L226 Difference]: Without dead ends: 1292 [2023-11-21 19:42:38,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-21 19:42:38,630 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:42:38,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 83 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:42:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2023-11-21 19:42:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1292. [2023-11-21 19:42:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 910 states have (on average 1.2032967032967032) internal successors, (1095), 913 states have internal predecessors, (1095), 223 states have call successors, (223), 156 states have call predecessors, (223), 156 states have return successors, (241), 223 states have call predecessors, (241), 223 states have call successors, (241) [2023-11-21 19:42:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 1559 transitions. [2023-11-21 19:42:38,776 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 1559 transitions. Word has length 74 [2023-11-21 19:42:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:42:38,777 INFO L495 AbstractCegarLoop]: Abstraction has 1292 states and 1559 transitions. [2023-11-21 19:42:38,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-21 19:42:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 1559 transitions. [2023-11-21 19:42:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-21 19:42:38,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:42:38,779 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:42:38,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:42:38,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 19:42:38,995 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 19:42:38,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:42:38,995 INFO L85 PathProgramCache]: Analyzing trace with hash 407602949, now seen corresponding path program 1 times [2023-11-21 19:42:38,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:42:38,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381235175] [2023-11-21 19:42:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:38,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:42:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-21 19:42:39,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:42:39,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381235175] [2023-11-21 19:42:39,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381235175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:42:39,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332659518] [2023-11-21 19:42:39,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:39,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:42:39,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:42:39,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:42:39,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:42:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:39,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:42:39,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:42:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-21 19:42:39,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:42:39,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332659518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:42:39,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:42:39,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [14] total 15 [2023-11-21 19:42:39,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103728337] [2023-11-21 19:42:39,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:42:39,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:42:39,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:42:39,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:42:39,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-21 19:42:39,612 INFO L87 Difference]: Start difference. First operand 1292 states and 1559 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-21 19:42:39,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:42:39,914 INFO L93 Difference]: Finished difference Result 3820 states and 4594 transitions. [2023-11-21 19:42:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:42:39,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 75 [2023-11-21 19:42:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:42:39,931 INFO L225 Difference]: With dead ends: 3820 [2023-11-21 19:42:39,932 INFO L226 Difference]: Without dead ends: 2534 [2023-11-21 19:42:39,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-21 19:42:39,938 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 47 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:42:39,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 176 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:42:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2023-11-21 19:42:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2532. [2023-11-21 19:42:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2532 states, 1776 states have (on average 1.1728603603603605) internal successors, (2083), 1778 states have internal predecessors, (2083), 442 states have call successors, (442), 312 states have call predecessors, (442), 312 states have return successors, (478), 442 states have call predecessors, (478), 442 states have call successors, (478) [2023-11-21 19:42:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 3003 transitions. [2023-11-21 19:42:40,241 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 3003 transitions. Word has length 75 [2023-11-21 19:42:40,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:42:40,241 INFO L495 AbstractCegarLoop]: Abstraction has 2532 states and 3003 transitions. [2023-11-21 19:42:40,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-21 19:42:40,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 3003 transitions. [2023-11-21 19:42:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-21 19:42:40,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:42:40,250 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:42:40,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:42:40,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-21 19:42:40,471 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 19:42:40,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:42:40,472 INFO L85 PathProgramCache]: Analyzing trace with hash -489138346, now seen corresponding path program 1 times [2023-11-21 19:42:40,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:42:40,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461323102] [2023-11-21 19:42:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:40,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:42:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-21 19:42:40,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:42:40,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461323102] [2023-11-21 19:42:40,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461323102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:42:40,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344895094] [2023-11-21 19:42:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:40,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:42:40,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:42:40,740 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:42:40,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:42:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:40,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:42:40,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:42:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-21 19:42:41,011 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:42:41,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344895094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:42:41,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:42:41,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [10] total 11 [2023-11-21 19:42:41,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988091005] [2023-11-21 19:42:41,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:42:41,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:42:41,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:42:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:42:41,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:42:41,015 INFO L87 Difference]: Start difference. First operand 2532 states and 3003 transitions. Second operand has 3 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-21 19:42:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:42:41,297 INFO L93 Difference]: Finished difference Result 2532 states and 3003 transitions. [2023-11-21 19:42:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:42:41,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 104 [2023-11-21 19:42:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:42:41,313 INFO L225 Difference]: With dead ends: 2532 [2023-11-21 19:42:41,313 INFO L226 Difference]: Without dead ends: 2531 [2023-11-21 19:42:41,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:42:41,315 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:42:41,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 83 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:42:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2023-11-21 19:42:41,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2531. [2023-11-21 19:42:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 1776 states have (on average 1.169481981981982) internal successors, (2077), 1777 states have internal predecessors, (2077), 442 states have call successors, (442), 312 states have call predecessors, (442), 312 states have return successors, (478), 442 states have call predecessors, (478), 442 states have call successors, (478) [2023-11-21 19:42:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 2997 transitions. [2023-11-21 19:42:41,601 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 2997 transitions. Word has length 104 [2023-11-21 19:42:41,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:42:41,603 INFO L495 AbstractCegarLoop]: Abstraction has 2531 states and 2997 transitions. [2023-11-21 19:42:41,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-21 19:42:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 2997 transitions. [2023-11-21 19:42:41,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-21 19:42:41,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:42:41,607 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:42:41,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:42:41,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:42:41,826 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 19:42:41,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:42:41,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2016580692, now seen corresponding path program 1 times [2023-11-21 19:42:41,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:42:41,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294179953] [2023-11-21 19:42:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:41,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:42:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-21 19:42:42,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:42:42,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294179953] [2023-11-21 19:42:42,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294179953] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:42:42,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368776390] [2023-11-21 19:42:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:42,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:42:42,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:42:42,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:42:42,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:42:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:42,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:42:42,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:42:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-21 19:42:42,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:42:42,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368776390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:42:42,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:42:42,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [10] total 11 [2023-11-21 19:42:42,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212412054] [2023-11-21 19:42:42,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:42:42,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:42:42,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:42:42,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:42:42,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:42:42,342 INFO L87 Difference]: Start difference. First operand 2531 states and 2997 transitions. Second operand has 3 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-21 19:42:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:42:42,762 INFO L93 Difference]: Finished difference Result 4722 states and 5601 transitions. [2023-11-21 19:42:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:42:42,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 105 [2023-11-21 19:42:42,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:42:42,790 INFO L225 Difference]: With dead ends: 4722 [2023-11-21 19:42:42,790 INFO L226 Difference]: Without dead ends: 4721 [2023-11-21 19:42:42,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:42:42,793 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 28 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:42:42,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 159 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:42:42,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2023-11-21 19:42:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 4721. [2023-11-21 19:42:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 3318 states have (on average 1.1702833031946955) internal successors, (3883), 3319 states have internal predecessors, (3883), 820 states have call successors, (820), 582 states have call predecessors, (820), 582 states have return successors, (892), 820 states have call predecessors, (892), 820 states have call successors, (892) [2023-11-21 19:42:43,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 5595 transitions. [2023-11-21 19:42:43,342 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 5595 transitions. Word has length 105 [2023-11-21 19:42:43,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:42:43,342 INFO L495 AbstractCegarLoop]: Abstraction has 4721 states and 5595 transitions. [2023-11-21 19:42:43,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-21 19:42:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 5595 transitions. [2023-11-21 19:42:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-21 19:42:43,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:42:43,352 INFO L195 NwaCegarLoop]: trace histogram [9, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:42:43,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 19:42:43,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 19:42:43,572 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 19:42:43,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:42:43,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1517221025, now seen corresponding path program 1 times [2023-11-21 19:42:43,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:42:43,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50806376] [2023-11-21 19:42:43,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:43,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:42:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 46 proven. 6 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-21 19:42:43,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:42:43,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50806376] [2023-11-21 19:42:43,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50806376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:42:43,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024190534] [2023-11-21 19:42:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:43,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:42:43,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:42:43,710 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:42:43,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 19:42:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:43,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:42:43,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:42:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-21 19:42:43,989 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:42:43,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024190534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:42:43,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:42:43,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 19:42:43,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277311309] [2023-11-21 19:42:43,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:42:43,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:42:43,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:42:43,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:42:43,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:42:43,994 INFO L87 Difference]: Start difference. First operand 4721 states and 5595 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-21 19:42:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:42:44,845 INFO L93 Difference]: Finished difference Result 12480 states and 14924 transitions. [2023-11-21 19:42:44,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:42:44,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 169 [2023-11-21 19:42:44,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:42:44,900 INFO L225 Difference]: With dead ends: 12480 [2023-11-21 19:42:44,900 INFO L226 Difference]: Without dead ends: 9319 [2023-11-21 19:42:44,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:42:44,910 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 41 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:42:44,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 164 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:42:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9319 states. [2023-11-21 19:42:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9319 to 9318. [2023-11-21 19:42:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9318 states, 6556 states have (on average 1.1644295302013423) internal successors, (7634), 6557 states have internal predecessors, (7634), 1597 states have call successors, (1597), 1164 states have call predecessors, (1597), 1164 states have return successors, (1729), 1597 states have call predecessors, (1729), 1597 states have call successors, (1729) [2023-11-21 19:42:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9318 states to 9318 states and 10960 transitions. [2023-11-21 19:42:46,070 INFO L78 Accepts]: Start accepts. Automaton has 9318 states and 10960 transitions. Word has length 169 [2023-11-21 19:42:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:42:46,070 INFO L495 AbstractCegarLoop]: Abstraction has 9318 states and 10960 transitions. [2023-11-21 19:42:46,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-21 19:42:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 9318 states and 10960 transitions. [2023-11-21 19:42:46,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-21 19:42:46,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:42:46,081 INFO L195 NwaCegarLoop]: trace histogram [9, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:42:46,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 19:42:46,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-21 19:42:46,301 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 19:42:46,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:42:46,302 INFO L85 PathProgramCache]: Analyzing trace with hash -602211519, now seen corresponding path program 1 times [2023-11-21 19:42:46,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:42:46,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236716348] [2023-11-21 19:42:46,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:46,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:42:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 41 proven. 19 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-21 19:42:46,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:42:46,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236716348] [2023-11-21 19:42:46,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236716348] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:42:46,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733167060] [2023-11-21 19:42:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:46,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:42:46,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:42:46,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:42:46,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 19:42:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:46,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:42:46,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:42:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-21 19:42:46,878 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:42:46,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733167060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:42:46,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:42:46,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [10] total 11 [2023-11-21 19:42:46,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128335958] [2023-11-21 19:42:46,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:42:46,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:42:46,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:42:46,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:42:46,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:42:46,881 INFO L87 Difference]: Start difference. First operand 9318 states and 10960 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-21 19:42:47,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:42:47,728 INFO L93 Difference]: Finished difference Result 17972 states and 21184 transitions. [2023-11-21 19:42:47,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:42:47,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 170 [2023-11-21 19:42:47,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:42:47,798 INFO L225 Difference]: With dead ends: 17972 [2023-11-21 19:42:47,798 INFO L226 Difference]: Without dead ends: 9319 [2023-11-21 19:42:47,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:42:47,823 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 38 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:42:47,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 175 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:42:47,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9319 states. [2023-11-21 19:42:48,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9319 to 9318. [2023-11-21 19:42:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9318 states, 6556 states have (on average 1.1625991458206224) internal successors, (7622), 6557 states have internal predecessors, (7622), 1597 states have call successors, (1597), 1164 states have call predecessors, (1597), 1164 states have return successors, (1729), 1597 states have call predecessors, (1729), 1597 states have call successors, (1729) [2023-11-21 19:42:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9318 states to 9318 states and 10948 transitions. [2023-11-21 19:42:48,985 INFO L78 Accepts]: Start accepts. Automaton has 9318 states and 10948 transitions. Word has length 170 [2023-11-21 19:42:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:42:48,985 INFO L495 AbstractCegarLoop]: Abstraction has 9318 states and 10948 transitions. [2023-11-21 19:42:48,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-21 19:42:48,986 INFO L276 IsEmpty]: Start isEmpty. Operand 9318 states and 10948 transitions. [2023-11-21 19:42:48,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-21 19:42:48,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:42:48,997 INFO L195 NwaCegarLoop]: trace histogram [9, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:42:49,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 19:42:49,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 19:42:49,211 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 19:42:49,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:42:49,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1672033663, now seen corresponding path program 1 times [2023-11-21 19:42:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:42:49,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332690958] [2023-11-21 19:42:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:49,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:42:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 41 proven. 23 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-21 19:42:49,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:42:49,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332690958] [2023-11-21 19:42:49,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332690958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:42:49,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572672074] [2023-11-21 19:42:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:49,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:42:49,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:42:49,593 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:42:49,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 19:42:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:49,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:42:49,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:42:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-21 19:42:49,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:42:49,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572672074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:42:49,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:42:49,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2023-11-21 19:42:49,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258382767] [2023-11-21 19:42:49,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:42:49,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:42:49,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:42:49,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:42:49,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:42:49,848 INFO L87 Difference]: Start difference. First operand 9318 states and 10948 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-21 19:42:50,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:42:50,856 INFO L93 Difference]: Finished difference Result 15167 states and 17794 transitions. [2023-11-21 19:42:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:42:50,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 174 [2023-11-21 19:42:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:42:50,902 INFO L225 Difference]: With dead ends: 15167 [2023-11-21 19:42:50,903 INFO L226 Difference]: Without dead ends: 10804 [2023-11-21 19:42:50,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:42:50,918 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 32 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:42:50,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 229 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:42:50,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2023-11-21 19:42:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 10768. [2023-11-21 19:42:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10768 states, 7580 states have (on average 1.158311345646438) internal successors, (8780), 7581 states have internal predecessors, (8780), 1843 states have call successors, (1843), 1344 states have call predecessors, (1843), 1344 states have return successors, (1975), 1843 states have call predecessors, (1975), 1843 states have call successors, (1975) [2023-11-21 19:42:51,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10768 states to 10768 states and 12598 transitions. [2023-11-21 19:42:51,988 INFO L78 Accepts]: Start accepts. Automaton has 10768 states and 12598 transitions. Word has length 174 [2023-11-21 19:42:51,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:42:51,990 INFO L495 AbstractCegarLoop]: Abstraction has 10768 states and 12598 transitions. [2023-11-21 19:42:51,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-21 19:42:51,991 INFO L276 IsEmpty]: Start isEmpty. Operand 10768 states and 12598 transitions. [2023-11-21 19:42:52,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-11-21 19:42:52,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:42:52,015 INFO L195 NwaCegarLoop]: trace histogram [13, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:42:52,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 19:42:52,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:42:52,241 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 19:42:52,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:42:52,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1761943057, now seen corresponding path program 1 times [2023-11-21 19:42:52,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:42:52,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471937286] [2023-11-21 19:42:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:52,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:42:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 64 proven. 34 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-21 19:42:52,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:42:52,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471937286] [2023-11-21 19:42:52,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471937286] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:42:52,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761262696] [2023-11-21 19:42:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:42:52,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:42:52,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:42:52,673 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:42:52,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a88e57-2a42-411d-bfea-8e67a728bb7b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 19:42:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:42:52,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:42:52,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:42:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-21 19:42:53,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:42:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2023-11-21 19:42:53,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761262696] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:42:53,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1746495970] [2023-11-21 19:42:53,496 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2023-11-21 19:42:53,496 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:42:53,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:42:53,506 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:42:53,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:42:59,596 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 34 for LOIs [2023-11-21 19:42:59,606 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 79 for LOIs [2023-11-21 19:42:59,681 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 92 for LOIs [2023-11-21 19:42:59,782 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 35 for LOIs [2023-11-21 19:42:59,797 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 85 for LOIs [2023-11-21 19:43:00,304 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 86 for LOIs [2023-11-21 19:43:00,700 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 43 for LOIs [2023-11-21 19:43:00,730 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:43:08,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1746495970] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:43:08,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:43:08,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [10, 2, 3] total 58 [2023-11-21 19:43:08,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685614954] [2023-11-21 19:43:08,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:43:08,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-21 19:43:08,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:43:08,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-21 19:43:08,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2747, Unknown=0, NotChecked=0, Total=3306 [2023-11-21 19:43:08,011 INFO L87 Difference]: Start difference. First operand 10768 states and 12598 transitions. Second operand has 46 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 32 states have internal predecessors, (56), 12 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-21 19:43:16,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:43:16,217 INFO L93 Difference]: Finished difference Result 20098 states and 23555 transitions. [2023-11-21 19:43:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-21 19:43:16,217 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 32 states have internal predecessors, (56), 12 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 236 [2023-11-21 19:43:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:43:16,261 INFO L225 Difference]: With dead ends: 20098 [2023-11-21 19:43:16,261 INFO L226 Difference]: Without dead ends: 10006 [2023-11-21 19:43:16,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 651 SyntacticMatches, 10 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3121 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1257, Invalid=6933, Unknown=0, NotChecked=0, Total=8190 [2023-11-21 19:43:16,293 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 197 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:43:16,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 366 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-21 19:43:16,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10006 states.