./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/busybox-1.22.0/sleep-3.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/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_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/busybox-1.22.0/sleep-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/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 64bit --witnessprinter.graph.data.programhash 49726dba769f8fa38c0387ce1a7d732542975ac5562ef4991c0ad7532e1b95e5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:34:00,852 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:34:00,953 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-21 19:34:00,962 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:34:00,962 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:34:01,006 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:34:01,007 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:34:01,008 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:34:01,011 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:34:01,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:34:01,017 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:34:01,018 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:34:01,018 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:34:01,020 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:34:01,020 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:34:01,021 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:34:01,021 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:34:01,022 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:34:01,022 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:34:01,023 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:34:01,023 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:34:01,024 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:34:01,025 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:34:01,025 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:34:01,026 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:34:01,026 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:34:01,026 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:34:01,027 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:34:01,027 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:34:01,028 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-21 19:34:01,029 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 19:34:01,029 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:34:01,029 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:34:01,030 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:34:01,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:34:01,030 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:34:01,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:34:01,031 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:34:01,031 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:34:01,032 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:34:01,032 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:34:01,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:34:01,033 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:34:01,033 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:34:01,033 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:34:01,034 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:34:01,034 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_d435fdfb-36c4-4dae-88f7-066b3094a67a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49726dba769f8fa38c0387ce1a7d732542975ac5562ef4991c0ad7532e1b95e5 [2023-11-21 19:34:01,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:34:01,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:34:01,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:34:01,398 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:34:01,399 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:34:01,401 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/busybox-1.22.0/sleep-3.i [2023-11-21 19:34:04,422 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:34:04,942 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:34:04,943 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/sv-benchmarks/c/busybox-1.22.0/sleep-3.i [2023-11-21 19:34:04,982 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/data/9741f9890/4c50828c42aa4279a1fa22175401749d/FLAG2721a6460 [2023-11-21 19:34:05,001 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/data/9741f9890/4c50828c42aa4279a1fa22175401749d [2023-11-21 19:34:05,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:34:05,010 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:34:05,013 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:34:05,014 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:34:05,019 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:34:05,020 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:34:05" (1/1) ... [2023-11-21 19:34:05,021 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156e526f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:05, skipping insertion in model container [2023-11-21 19:34:05,021 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:34:05" (1/1) ... [2023-11-21 19:34:05,114 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:34:06,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:34:06,787 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:34:07,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:34:07,220 WARN L675 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:34:07,220 WARN L675 CHandler]: The function strtoull is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:34:07,227 WARN L675 CHandler]: The function strspn is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:34:07,235 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:34:07,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:07 WrapperNode [2023-11-21 19:34:07,236 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:34:07,242 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:34:07,242 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:34:07,243 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:34:07,277 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:07" (1/1) ... [2023-11-21 19:34:07,338 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:07" (1/1) ... [2023-11-21 19:34:07,399 INFO L138 Inliner]: procedures = 633, calls = 241, calls flagged for inlining = 17, calls inlined = 15, statements flattened = 782 [2023-11-21 19:34:07,399 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:34:07,400 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:34:07,400 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:34:07,400 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:34:07,410 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:07" (1/1) ... [2023-11-21 19:34:07,410 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:07" (1/1) ... [2023-11-21 19:34:07,425 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:07" (1/1) ... [2023-11-21 19:34:07,426 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:07" (1/1) ... [2023-11-21 19:34:07,468 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:07" (1/1) ... [2023-11-21 19:34:07,490 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:07" (1/1) ... [2023-11-21 19:34:07,499 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:07" (1/1) ... [2023-11-21 19:34:07,506 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:07" (1/1) ... [2023-11-21 19:34:07,518 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:34:07,519 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:34:07,520 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:34:07,520 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:34:07,521 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:07" (1/1) ... [2023-11-21 19:34:07,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:34:07,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:07,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:34:07,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:34:07,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:34:07,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-21 19:34:07,592 INFO L130 BoogieDeclarations]: Found specification of procedure xatoul_sfx [2023-11-21 19:34:07,592 INFO L138 BoogieDeclarations]: Found implementation of procedure xatoul_sfx [2023-11-21 19:34:07,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-21 19:34:07,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:34:07,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:34:07,593 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-11-21 19:34:07,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:34:07,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 19:34:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:34:07,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:34:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-11-21 19:34:07,594 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-11-21 19:34:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-21 19:34:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-21 19:34:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 19:34:07,595 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 19:34:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:34:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 19:34:07,596 INFO L130 BoogieDeclarations]: Found specification of procedure bb_show_usage [2023-11-21 19:34:07,596 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_show_usage [2023-11-21 19:34:07,596 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2023-11-21 19:34:07,596 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-11-21 19:34:07,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:34:07,597 INFO L130 BoogieDeclarations]: Found specification of procedure bb_error_msg_and_die [2023-11-21 19:34:07,597 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_error_msg_and_die [2023-11-21 19:34:07,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:34:08,005 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:34:08,008 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:34:09,046 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:34:09,305 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:34:09,305 INFO L308 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-21 19:34:09,307 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:34:09 BoogieIcfgContainer [2023-11-21 19:34:09,308 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:34:09,311 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:34:09,311 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:34:09,316 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:34:09,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:34:05" (1/3) ... [2023-11-21 19:34:09,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152bcb1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:34:09, skipping insertion in model container [2023-11-21 19:34:09,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:07" (2/3) ... [2023-11-21 19:34:09,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152bcb1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:34:09, skipping insertion in model container [2023-11-21 19:34:09,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:34:09" (3/3) ... [2023-11-21 19:34:09,320 INFO L112 eAbstractionObserver]: Analyzing ICFG sleep-3.i [2023-11-21 19:34:09,341 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:34:09,342 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-11-21 19:34:09,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:34:09,429 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;@120ab9cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:34:09,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-11-21 19:34:09,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 182 states, 122 states have (on average 1.6721311475409837) internal successors, (204), 162 states have internal predecessors, (204), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-21 19:34:09,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 19:34:09,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:09,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 19:34:09,451 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-21 19:34:09,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash 629768, now seen corresponding path program 1 times [2023-11-21 19:34:09,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:09,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399803630] [2023-11-21 19:34:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:09,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:10,051 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 19:34:10,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:10,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399803630] [2023-11-21 19:34:10,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399803630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:10,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:10,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:34:10,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516304202] [2023-11-21 19:34:10,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:10,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:34:10,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:10,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:34:10,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:34:10,097 INFO L87 Difference]: Start difference. First operand has 182 states, 122 states have (on average 1.6721311475409837) internal successors, (204), 162 states have internal predecessors, (204), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:10,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:10,338 INFO L93 Difference]: Finished difference Result 359 states and 475 transitions. [2023-11-21 19:34:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:10,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-21 19:34:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:10,351 INFO L225 Difference]: With dead ends: 359 [2023-11-21 19:34:10,351 INFO L226 Difference]: Without dead ends: 174 [2023-11-21 19:34:10,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 19:34:10,369 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 1 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:10,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 380 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:34:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-21 19:34:10,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2023-11-21 19:34:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 119 states have (on average 1.5798319327731092) internal successors, (188), 157 states have internal predecessors, (188), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 19:34:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 214 transitions. [2023-11-21 19:34:10,453 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 214 transitions. Word has length 3 [2023-11-21 19:34:10,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:10,454 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 214 transitions. [2023-11-21 19:34:10,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 214 transitions. [2023-11-21 19:34:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 19:34:10,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:10,457 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-21 19:34:10,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:34:10,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-21 19:34:10,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:10,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1581861942, now seen corresponding path program 1 times [2023-11-21 19:34:10,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:10,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342887559] [2023-11-21 19:34:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:10,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:10,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:10,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342887559] [2023-11-21 19:34:10,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342887559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:34:10,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690874301] [2023-11-21 19:34:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:10,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:10,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:10,643 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:10,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:34:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:10,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:34:10,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:10,930 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:10,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690874301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:10,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:34:10,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-21 19:34:10,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130701391] [2023-11-21 19:34:10,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:10,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:34:10,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:10,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:34:10,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:10,934 INFO L87 Difference]: Start difference. First operand 174 states and 214 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:11,075 INFO L93 Difference]: Finished difference Result 174 states and 214 transitions. [2023-11-21 19:34:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:34:11,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-21 19:34:11,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:11,077 INFO L225 Difference]: With dead ends: 174 [2023-11-21 19:34:11,078 INFO L226 Difference]: Without dead ends: 173 [2023-11-21 19:34:11,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:11,079 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 2 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:11,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 543 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:34:11,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-21 19:34:11,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2023-11-21 19:34:11,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 119 states have (on average 1.5714285714285714) internal successors, (187), 156 states have internal predecessors, (187), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 19:34:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 213 transitions. [2023-11-21 19:34:11,095 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 213 transitions. Word has length 6 [2023-11-21 19:34:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:11,095 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 213 transitions. [2023-11-21 19:34:11,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 213 transitions. [2023-11-21 19:34:11,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 19:34:11,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:11,096 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-11-21 19:34:11,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:11,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:11,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-21 19:34:11,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1793080261, now seen corresponding path program 1 times [2023-11-21 19:34:11,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:11,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997116777] [2023-11-21 19:34:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:11,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:34:11,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:11,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997116777] [2023-11-21 19:34:11,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997116777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:11,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:11,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:34:11,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920211337] [2023-11-21 19:34:11,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:11,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:34:11,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:11,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:34:11,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:34:11,467 INFO L87 Difference]: Start difference. First operand 173 states and 213 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:11,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:11,559 INFO L93 Difference]: Finished difference Result 173 states and 213 transitions. [2023-11-21 19:34:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:11,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-21 19:34:11,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:11,562 INFO L225 Difference]: With dead ends: 173 [2023-11-21 19:34:11,562 INFO L226 Difference]: Without dead ends: 172 [2023-11-21 19:34:11,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:34:11,571 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 0 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:11,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 362 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:34:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-21 19:34:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2023-11-21 19:34:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 117 states have (on average 1.5726495726495726) internal successors, (184), 153 states have internal predecessors, (184), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 19:34:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 210 transitions. [2023-11-21 19:34:11,594 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 210 transitions. Word has length 7 [2023-11-21 19:34:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:11,595 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 210 transitions. [2023-11-21 19:34:11,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:34:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 210 transitions. [2023-11-21 19:34:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 19:34:11,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:11,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:11,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:34:11,597 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-21 19:34:11,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:11,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1211834443, now seen corresponding path program 1 times [2023-11-21 19:34:11,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:11,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401345835] [2023-11-21 19:34:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:11,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:11,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:11,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401345835] [2023-11-21 19:34:11,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401345835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:34:11,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651574790] [2023-11-21 19:34:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:11,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:11,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:11,771 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:11,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:34:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:11,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:34:11,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:34:12,005 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:12,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651574790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:12,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:34:12,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 19:34:12,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355801999] [2023-11-21 19:34:12,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:12,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:34:12,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:12,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:34:12,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:12,007 INFO L87 Difference]: Start difference. First operand 170 states and 210 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:12,106 INFO L93 Difference]: Finished difference Result 170 states and 210 transitions. [2023-11-21 19:34:12,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:12,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-21 19:34:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:12,109 INFO L225 Difference]: With dead ends: 170 [2023-11-21 19:34:12,109 INFO L226 Difference]: Without dead ends: 168 [2023-11-21 19:34:12,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:12,110 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 54 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:12,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 304 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:34:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-21 19:34:12,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-11-21 19:34:12,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 117 states have (on average 1.5555555555555556) internal successors, (182), 151 states have internal predecessors, (182), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 19:34:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2023-11-21 19:34:12,125 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 9 [2023-11-21 19:34:12,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:12,126 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2023-11-21 19:34:12,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:12,127 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2023-11-21 19:34:12,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 19:34:12,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:12,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:12,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:12,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:12,349 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-21 19:34:12,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:12,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1087837607, now seen corresponding path program 1 times [2023-11-21 19:34:12,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:12,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512498526] [2023-11-21 19:34:12,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:12,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:12,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:12,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512498526] [2023-11-21 19:34:12,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512498526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:34:12,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677416799] [2023-11-21 19:34:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:12,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:12,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:12,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:12,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:34:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:12,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:34:12,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:12,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:34:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:12,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677416799] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:34:12,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1506925533] [2023-11-21 19:34:12,759 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-21 19:34:12,759 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:34:12,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:34:12,773 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:34:12,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:34:16,931 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 94 for LOIs [2023-11-21 19:34:16,964 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:34:17,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1506925533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:17,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:34:17,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 3, 4] total 13 [2023-11-21 19:34:17,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641488286] [2023-11-21 19:34:17,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:17,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:34:17,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:17,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:34:17,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-21 19:34:17,945 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:19,419 INFO L93 Difference]: Finished difference Result 170 states and 209 transitions. [2023-11-21 19:34:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:34:19,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-21 19:34:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:19,422 INFO L225 Difference]: With dead ends: 170 [2023-11-21 19:34:19,422 INFO L226 Difference]: Without dead ends: 168 [2023-11-21 19:34:19,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-21 19:34:19,423 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 4 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:19,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 700 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-21 19:34:19,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-21 19:34:19,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-11-21 19:34:19,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 118 states have (on average 1.5338983050847457) internal successors, (181), 150 states have internal predecessors, (181), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 19:34:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 207 transitions. [2023-11-21 19:34:19,441 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 207 transitions. Word has length 10 [2023-11-21 19:34:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:19,441 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 207 transitions. [2023-11-21 19:34:19,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 207 transitions. [2023-11-21 19:34:19,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 19:34:19,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:19,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:19,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:19,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:19,660 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-21 19:34:19,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:19,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1917109656, now seen corresponding path program 1 times [2023-11-21 19:34:19,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:19,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268289876] [2023-11-21 19:34:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:19,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:19,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:19,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268289876] [2023-11-21 19:34:19,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268289876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:34:19,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121104636] [2023-11-21 19:34:19,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:19,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:19,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:19,896 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:19,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:34:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:20,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:34:20,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:34:20,159 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:20,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121104636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:20,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:34:20,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 19:34:20,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955147849] [2023-11-21 19:34:20,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:20,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:34:20,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:20,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:34:20,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:20,162 INFO L87 Difference]: Start difference. First operand 168 states and 207 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:20,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:20,266 INFO L93 Difference]: Finished difference Result 168 states and 207 transitions. [2023-11-21 19:34:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:20,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-21 19:34:20,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:20,268 INFO L225 Difference]: With dead ends: 168 [2023-11-21 19:34:20,269 INFO L226 Difference]: Without dead ends: 167 [2023-11-21 19:34:20,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:20,270 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 2 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:20,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 349 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:34:20,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-21 19:34:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-21 19:34:20,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 118 states have (on average 1.5254237288135593) internal successors, (180), 149 states have internal predecessors, (180), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 19:34:20,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 206 transitions. [2023-11-21 19:34:20,285 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 206 transitions. Word has length 15 [2023-11-21 19:34:20,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:20,285 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 206 transitions. [2023-11-21 19:34:20,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 206 transitions. [2023-11-21 19:34:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 19:34:20,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:20,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:20,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:20,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:20,508 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-21 19:34:20,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:20,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1917119678, now seen corresponding path program 1 times [2023-11-21 19:34:20,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:20,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089735276] [2023-11-21 19:34:20,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:20,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:20,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:20,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089735276] [2023-11-21 19:34:20,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089735276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:34:20,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26343732] [2023-11-21 19:34:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:20,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:20,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:20,711 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:20,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 19:34:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:20,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:34:20,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:34:21,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:21,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26343732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:21,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:34:21,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 19:34:21,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842985007] [2023-11-21 19:34:21,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:21,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:34:21,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:21,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:34:21,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:21,006 INFO L87 Difference]: Start difference. First operand 167 states and 206 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:21,126 INFO L93 Difference]: Finished difference Result 167 states and 206 transitions. [2023-11-21 19:34:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:21,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-21 19:34:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:21,129 INFO L225 Difference]: With dead ends: 167 [2023-11-21 19:34:21,129 INFO L226 Difference]: Without dead ends: 166 [2023-11-21 19:34:21,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:21,130 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 6 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:21,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 342 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:34:21,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-21 19:34:21,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2023-11-21 19:34:21,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 118 states have (on average 1.5169491525423728) internal successors, (179), 148 states have internal predecessors, (179), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 19:34:21,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 205 transitions. [2023-11-21 19:34:21,146 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 205 transitions. Word has length 15 [2023-11-21 19:34:21,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:21,147 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 205 transitions. [2023-11-21 19:34:21,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 205 transitions. [2023-11-21 19:34:21,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 19:34:21,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:21,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:21,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:21,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:21,368 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-21 19:34:21,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:21,369 INFO L85 PathProgramCache]: Analyzing trace with hash -699142459, now seen corresponding path program 1 times [2023-11-21 19:34:21,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:21,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684210316] [2023-11-21 19:34:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:21,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:21,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:21,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684210316] [2023-11-21 19:34:21,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684210316] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:34:21,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372661779] [2023-11-21 19:34:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:21,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:21,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:21,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:21,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 19:34:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:21,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:34:21,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:34:21,817 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:21,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372661779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:21,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:34:21,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 19:34:21,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925681273] [2023-11-21 19:34:21,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:21,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:34:21,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:21,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:34:21,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:21,819 INFO L87 Difference]: Start difference. First operand 166 states and 205 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:21,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:21,936 INFO L93 Difference]: Finished difference Result 323 states and 402 transitions. [2023-11-21 19:34:21,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:21,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-21 19:34:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:21,938 INFO L225 Difference]: With dead ends: 323 [2023-11-21 19:34:21,938 INFO L226 Difference]: Without dead ends: 169 [2023-11-21 19:34:21,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:21,940 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 0 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:21,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 348 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:34:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-21 19:34:21,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-11-21 19:34:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 121 states have (on average 1.5041322314049588) internal successors, (182), 151 states have internal predecessors, (182), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 19:34:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 208 transitions. [2023-11-21 19:34:21,951 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 208 transitions. Word has length 16 [2023-11-21 19:34:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:21,952 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 208 transitions. [2023-11-21 19:34:21,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 208 transitions. [2023-11-21 19:34:21,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 19:34:21,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:21,953 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:21,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:22,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:22,167 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-21 19:34:22,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:22,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1856236075, now seen corresponding path program 1 times [2023-11-21 19:34:22,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:22,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733771793] [2023-11-21 19:34:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:22,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 19:34:22,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:22,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733771793] [2023-11-21 19:34:22,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733771793] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:34:22,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708775472] [2023-11-21 19:34:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:22,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:22,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:22,330 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:22,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 19:34:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:22,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:34:22,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:34:22,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:22,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708775472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:22,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:34:22,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 19:34:22,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779864824] [2023-11-21 19:34:22,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:22,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:34:22,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:22,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:34:22,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:22,608 INFO L87 Difference]: Start difference. First operand 169 states and 208 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:22,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:22,706 INFO L93 Difference]: Finished difference Result 169 states and 208 transitions. [2023-11-21 19:34:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:22,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-21 19:34:22,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:22,711 INFO L225 Difference]: With dead ends: 169 [2023-11-21 19:34:22,711 INFO L226 Difference]: Without dead ends: 168 [2023-11-21 19:34:22,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:22,712 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 0 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:22,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 347 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:34:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-21 19:34:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2023-11-21 19:34:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 119 states have (on average 1.504201680672269) internal successors, (179), 148 states have internal predecessors, (179), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 19:34:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 205 transitions. [2023-11-21 19:34:22,726 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 205 transitions. Word has length 19 [2023-11-21 19:34:22,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:22,727 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 205 transitions. [2023-11-21 19:34:22,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:22,727 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 205 transitions. [2023-11-21 19:34:22,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 19:34:22,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:22,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:22,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:22,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:22,949 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-21 19:34:22,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:22,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1855925384, now seen corresponding path program 1 times [2023-11-21 19:34:22,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:22,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717108590] [2023-11-21 19:34:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:22,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:34:23,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:23,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717108590] [2023-11-21 19:34:23,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717108590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:34:23,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716884931] [2023-11-21 19:34:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:23,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:23,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:23,109 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:23,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 19:34:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:23,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:34:23,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:34:23,401 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:34:23,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716884931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:23,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:34:23,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 19:34:23,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788125671] [2023-11-21 19:34:23,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:23,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:34:23,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:23,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:34:23,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:23,403 INFO L87 Difference]: Start difference. First operand 166 states and 205 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:23,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:23,517 INFO L93 Difference]: Finished difference Result 174 states and 215 transitions. [2023-11-21 19:34:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:23,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-21 19:34:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:23,519 INFO L225 Difference]: With dead ends: 174 [2023-11-21 19:34:23,519 INFO L226 Difference]: Without dead ends: 173 [2023-11-21 19:34:23,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:23,520 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 0 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:23,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 344 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:34:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-21 19:34:23,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2023-11-21 19:34:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 126 states have (on average 1.492063492063492) internal successors, (188), 155 states have internal predecessors, (188), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 19:34:23,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 214 transitions. [2023-11-21 19:34:23,534 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 214 transitions. Word has length 19 [2023-11-21 19:34:23,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:23,535 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 214 transitions. [2023-11-21 19:34:23,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:23,535 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 214 transitions. [2023-11-21 19:34:23,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 19:34:23,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:23,536 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] [2023-11-21 19:34:23,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:23,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:23,758 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting xatoul_sfxErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-21 19:34:23,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:23,758 INFO L85 PathProgramCache]: Analyzing trace with hash 422548729, now seen corresponding path program 1 times [2023-11-21 19:34:23,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:23,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315911941] [2023-11-21 19:34:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:23,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:23,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:23,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315911941] [2023-11-21 19:34:23,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315911941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:34:23,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958103200] [2023-11-21 19:34:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:23,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:23,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:23,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:23,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 19:34:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:24,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:34:24,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:24,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:34:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:24,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958103200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:34:24,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [457390648] [2023-11-21 19:34:24,223 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-21 19:34:24,223 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:34:24,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:34:24,224 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:34:24,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:34:27,160 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 94 for LOIs [2023-11-21 19:34:27,179 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:34:30,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [457390648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:30,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:34:30,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4, 3, 4] total 16 [2023-11-21 19:34:30,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835273536] [2023-11-21 19:34:30,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:30,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 19:34:30,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:30,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 19:34:30,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2023-11-21 19:34:30,863 INFO L87 Difference]: Start difference. First operand 173 states and 214 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:32,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:32,460 INFO L93 Difference]: Finished difference Result 319 states and 396 transitions. [2023-11-21 19:34:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 19:34:32,461 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-21 19:34:32,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:32,462 INFO L225 Difference]: With dead ends: 319 [2023-11-21 19:34:32,462 INFO L226 Difference]: Without dead ends: 173 [2023-11-21 19:34:32,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2023-11-21 19:34:32,464 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 1 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:32,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 684 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 318 Invalid, 1 Unknown, 0 Unchecked, 1.6s Time] [2023-11-21 19:34:32,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-21 19:34:32,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2023-11-21 19:34:32,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 126 states have (on average 1.4841269841269842) internal successors, (187), 155 states have internal predecessors, (187), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 19:34:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 213 transitions. [2023-11-21 19:34:32,477 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 213 transitions. Word has length 21 [2023-11-21 19:34:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:32,477 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 213 transitions. [2023-11-21 19:34:32,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:34:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 213 transitions. [2023-11-21 19:34:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 19:34:32,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:32,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:32,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:32,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-21 19:34:32,695 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-21 19:34:32,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash 958146107, now seen corresponding path program 1 times [2023-11-21 19:34:32,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:32,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487558292] [2023-11-21 19:34:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:32,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 19:34:32,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:32,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487558292] [2023-11-21 19:34:32,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487558292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:34:32,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182868085] [2023-11-21 19:34:32,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:32,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:32,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:32,834 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:32,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 19:34:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:33,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:34:33,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 19:34:33,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:34:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 19:34:33,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182868085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:34:33,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1213417809] [2023-11-21 19:34:33,165 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-21 19:34:33,165 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:34:33,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:34:33,165 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:34:33,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:34:41,235 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 94 for LOIs [2023-11-21 19:34:41,253 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:34:45,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5950#(<= 2147483647 |ULTIMATE.start_main_~i~4#1|)' at error location [2023-11-21 19:34:45,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:34:45,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:34:45,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-11-21 19:34:45,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285128527] [2023-11-21 19:34:45,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:34:45,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:34:45,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:45,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:34:45,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=321, Unknown=1, NotChecked=0, Total=380 [2023-11-21 19:34:45,987 INFO L87 Difference]: Start difference. First operand 173 states and 213 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 19:34:46,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:46,174 INFO L93 Difference]: Finished difference Result 350 states and 432 transitions. [2023-11-21 19:34:46,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:34:46,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-11-21 19:34:46,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:46,177 INFO L225 Difference]: With dead ends: 350 [2023-11-21 19:34:46,177 INFO L226 Difference]: Without dead ends: 182 [2023-11-21 19:34:46,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=58, Invalid=321, Unknown=1, NotChecked=0, Total=380 [2023-11-21 19:34:46,178 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 4 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:46,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 696 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:34:46,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-21 19:34:46,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2023-11-21 19:34:46,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 135 states have (on average 1.451851851851852) internal successors, (196), 164 states have internal predecessors, (196), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 19:34:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 222 transitions. [2023-11-21 19:34:46,192 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 222 transitions. Word has length 26 [2023-11-21 19:34:46,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:46,193 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 222 transitions. [2023-11-21 19:34:46,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 19:34:46,193 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 222 transitions. [2023-11-21 19:34:46,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-21 19:34:46,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:46,194 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:46,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:46,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 19:34:46,424 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-21 19:34:46,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:46,425 INFO L85 PathProgramCache]: Analyzing trace with hash 389544845, now seen corresponding path program 2 times [2023-11-21 19:34:46,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:46,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88760419] [2023-11-21 19:34:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:46,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-21 19:34:46,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:46,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88760419] [2023-11-21 19:34:46,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88760419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:34:46,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028383064] [2023-11-21 19:34:46,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:34:46,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:46,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:46,661 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:46,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d435fdfb-36c4-4dae-88f7-066b3094a67a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 19:34:46,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-21 19:34:46,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:34:46,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:34:46,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-21 19:34:47,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:34:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-21 19:34:47,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028383064] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:34:47,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [468532930] [2023-11-21 19:34:47,052 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-21 19:34:47,052 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:34:47,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:34:47,053 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:34:47,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:34:54,513 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 94 for LOIs [2023-11-21 19:34:54,533 INFO L180 IcfgInterpreter]: Interpretation finished