./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/busybox-1.22.0/printf-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff 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_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/busybox-1.22.0/printf-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ --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 92d2a3c1755022312f13a0ac97992cc62ba66cba961ad3a9f180dfb959f6e2b9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:58:37,236 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:58:37,345 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-19 04:58:37,360 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:58:37,361 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:58:37,404 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:58:37,405 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:58:37,405 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:58:37,407 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:58:37,412 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:58:37,413 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:58:37,414 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:58:37,415 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:58:37,417 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:58:37,417 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:58:37,418 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:58:37,418 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:58:37,419 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:58:37,419 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:58:37,420 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:58:37,420 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:58:37,421 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:58:37,422 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:58:37,423 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:58:37,423 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:58:37,423 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:58:37,424 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:58:37,424 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:58:37,425 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:58:37,425 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 04:58:37,427 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:58:37,427 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:58:37,427 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:58:37,428 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:58:37,428 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:58:37,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:37,428 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:58:37,429 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:58:37,429 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:58:37,429 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:58:37,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:58:37,430 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:58:37,430 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:58:37,430 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:58:37,431 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_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92d2a3c1755022312f13a0ac97992cc62ba66cba961ad3a9f180dfb959f6e2b9 [2023-11-19 04:58:37,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:58:37,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:58:37,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:58:37,779 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:58:37,780 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:58:37,782 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/busybox-1.22.0/printf-1.i [2023-11-19 04:58:41,048 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:58:41,600 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:58:41,600 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/sv-benchmarks/c/busybox-1.22.0/printf-1.i [2023-11-19 04:58:41,644 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/data/4990975bb/4f29bae10a08412dbe411174b51313a8/FLAG328cfba07 [2023-11-19 04:58:41,661 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/data/4990975bb/4f29bae10a08412dbe411174b51313a8 [2023-11-19 04:58:41,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:58:41,670 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:58:41,676 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:41,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:58:41,682 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:58:41,682 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:41" (1/1) ... [2023-11-19 04:58:41,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65beb01c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:41, skipping insertion in model container [2023-11-19 04:58:41,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:41" (1/1) ... [2023-11-19 04:58:41,786 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:58:43,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:43,729 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:58:43,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:44,126 WARN L675 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:58:44,127 WARN L675 CHandler]: The function strtoull is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:58:44,127 WARN L675 CHandler]: The function strtol is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:58:44,127 WARN L675 CHandler]: The function strstr is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:58:44,127 WARN L675 CHandler]: The function putchar is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:58:44,128 WARN L675 CHandler]: The function strtoll is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:58:44,128 WARN L675 CHandler]: The function convert is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:58:44,136 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:58:44,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:44 WrapperNode [2023-11-19 04:58:44,137 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:44,138 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:44,139 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:58:44,139 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:58:44,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:44" (1/1) ... [2023-11-19 04:58:44,234 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:44" (1/1) ... [2023-11-19 04:58:44,366 INFO L138 Inliner]: procedures = 648, calls = 525, calls flagged for inlining = 31, calls inlined = 29, statements flattened = 1608 [2023-11-19 04:58:44,367 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:44,367 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:58:44,368 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:58:44,368 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:58:44,378 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:44" (1/1) ... [2023-11-19 04:58:44,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:44" (1/1) ... [2023-11-19 04:58:44,398 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:44" (1/1) ... [2023-11-19 04:58:44,399 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:44" (1/1) ... [2023-11-19 04:58:44,519 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:44" (1/1) ... [2023-11-19 04:58:44,532 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:44" (1/1) ... [2023-11-19 04:58:44,581 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:44" (1/1) ... [2023-11-19 04:58:44,592 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:44" (1/1) ... [2023-11-19 04:58:44,627 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:58:44,628 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:58:44,629 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:58:44,629 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:58:44,630 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:44" (1/1) ... [2023-11-19 04:58:44,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:44,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:44,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:58:44,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:58:44,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-19 04:58:44,732 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2023-11-19 04:58:44,732 INFO L130 BoogieDeclarations]: Found specification of procedure bb_putchar [2023-11-19 04:58:44,732 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_putchar [2023-11-19 04:58:44,734 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2023-11-19 04:58:44,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:58:44,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2023-11-19 04:58:44,735 INFO L130 BoogieDeclarations]: Found specification of procedure ret_ERANGE [2023-11-19 04:58:44,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ret_ERANGE [2023-11-19 04:58:44,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-19 04:58:44,735 INFO L130 BoogieDeclarations]: Found specification of procedure bb_verror_msg [2023-11-19 04:58:44,735 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_verror_msg [2023-11-19 04:58:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 04:58:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:58:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure get_width_prec [2023-11-19 04:58:44,738 INFO L138 BoogieDeclarations]: Found implementation of procedure get_width_prec [2023-11-19 04:58:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-11-19 04:58:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-19 04:58:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:58:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-11-19 04:58:44,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:58:44,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:58:44,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:58:44,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:58:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-19 04:58:44,741 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-19 04:58:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-11-19 04:58:44,742 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-11-19 04:58:44,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-19 04:58:44,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-19 04:58:44,742 INFO L130 BoogieDeclarations]: Found specification of procedure handle_errors [2023-11-19 04:58:44,742 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_errors [2023-11-19 04:58:44,742 INFO L130 BoogieDeclarations]: Found specification of procedure bb_process_escape_sequence [2023-11-19 04:58:44,743 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_process_escape_sequence [2023-11-19 04:58:44,743 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:58:44,743 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:58:44,743 INFO L130 BoogieDeclarations]: Found specification of procedure print_direc [2023-11-19 04:58:44,743 INFO L138 BoogieDeclarations]: Found implementation of procedure print_direc [2023-11-19 04:58:44,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:58:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:58:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:58:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure bb_ascii_isalnum [2023-11-19 04:58:44,744 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_ascii_isalnum [2023-11-19 04:58:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-11-19 04:58:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:58:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-11-19 04:58:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure bb_strtoll [2023-11-19 04:58:44,745 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_strtoll [2023-11-19 04:58:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure multiconvert [2023-11-19 04:58:44,745 INFO L138 BoogieDeclarations]: Found implementation of procedure multiconvert [2023-11-19 04:58:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2023-11-19 04:58:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:58:44,746 INFO L130 BoogieDeclarations]: Found specification of procedure bb_error_msg [2023-11-19 04:58:44,746 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_error_msg [2023-11-19 04:58:45,308 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:58:45,311 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:58:47,614 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:58:48,071 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:58:48,071 INFO L302 CfgBuilder]: Removed 19 assume(true) statements. [2023-11-19 04:58:48,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:48 BoogieIcfgContainer [2023-11-19 04:58:48,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:58:48,095 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:58:48,096 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:58:48,100 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:58:48,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:58:41" (1/3) ... [2023-11-19 04:58:48,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434524c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:48, skipping insertion in model container [2023-11-19 04:58:48,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:44" (2/3) ... [2023-11-19 04:58:48,104 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434524c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:48, skipping insertion in model container [2023-11-19 04:58:48,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:48" (3/3) ... [2023-11-19 04:58:48,107 INFO L112 eAbstractionObserver]: Analyzing ICFG printf-1.i [2023-11-19 04:58:48,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:58:48,133 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2023-11-19 04:58:48,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:58:48,250 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;@3d6f8623, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:58:48,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-19 04:58:48,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 400 states, 279 states have (on average 1.6021505376344085) internal successors, (447), 346 states have internal predecessors, (447), 54 states have call successors, (54), 14 states have call predecessors, (54), 14 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-19 04:58:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 04:58:48,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:48,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 04:58:48,273 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_process_escape_sequenceErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_process_escape_sequenceErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 04:58:48,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:48,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1550127, now seen corresponding path program 1 times [2023-11-19 04:58:48,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:48,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801122153] [2023-11-19 04:58:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:48,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:48,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:48,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801122153] [2023-11-19 04:58:48,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801122153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:48,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:48,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 04:58:48,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770403389] [2023-11-19 04:58:48,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:48,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:48,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:48,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:48,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:48,998 INFO L87 Difference]: Start difference. First operand has 400 states, 279 states have (on average 1.6021505376344085) internal successors, (447), 346 states have internal predecessors, (447), 54 states have call successors, (54), 14 states have call predecessors, (54), 14 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) 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) [2023-11-19 04:58:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:49,543 INFO L93 Difference]: Finished difference Result 788 states and 1128 transitions. [2023-11-19 04:58:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:49,546 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 [2023-11-19 04:58:49,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:49,599 INFO L225 Difference]: With dead ends: 788 [2023-11-19 04:58:49,599 INFO L226 Difference]: Without dead ends: 375 [2023-11-19 04:58:49,608 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 [2023-11-19 04:58:49,613 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 1 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:49,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 890 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:58:49,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-11-19 04:58:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2023-11-19 04:58:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 280 states have (on average 1.4607142857142856) internal successors, (409), 323 states have internal predecessors, (409), 40 states have call successors, (40), 13 states have call predecessors, (40), 13 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-19 04:58:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 488 transitions. [2023-11-19 04:58:49,698 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 488 transitions. Word has length 3 [2023-11-19 04:58:49,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:49,699 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 488 transitions. [2023-11-19 04:58:49,699 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) [2023-11-19 04:58:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 488 transitions. [2023-11-19 04:58:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:58:49,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:49,700 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 04:58:49,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:58:49,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_process_escape_sequenceErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_process_escape_sequenceErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 04:58:49,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:49,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1063816935, now seen corresponding path program 1 times [2023-11-19 04:58:49,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:49,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771797156] [2023-11-19 04:58:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:49,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:49,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:49,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771797156] [2023-11-19 04:58:49,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771797156] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:49,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205722742] [2023-11-19 04:58:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:49,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:49,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:49,915 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:49,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:58:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:50,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:58:50,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:50,326 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:50,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205722742] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:50,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:50,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-19 04:58:50,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234059683] [2023-11-19 04:58:50,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:50,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:58:50,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:50,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:58:50,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:58:50,344 INFO L87 Difference]: Start difference. First operand 375 states and 488 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) [2023-11-19 04:58:50,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:50,656 INFO L93 Difference]: Finished difference Result 375 states and 488 transitions. [2023-11-19 04:58:50,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:58:50,657 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 [2023-11-19 04:58:50,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:50,661 INFO L225 Difference]: With dead ends: 375 [2023-11-19 04:58:50,661 INFO L226 Difference]: Without dead ends: 374 [2023-11-19 04:58:50,663 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 [2023-11-19 04:58:50,664 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 3 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:50,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 830 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:58:50,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-19 04:58:50,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2023-11-19 04:58:50,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 280 states have (on average 1.457142857142857) internal successors, (408), 322 states have internal predecessors, (408), 40 states have call successors, (40), 13 states have call predecessors, (40), 13 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-19 04:58:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 487 transitions. [2023-11-19 04:58:50,696 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 487 transitions. Word has length 6 [2023-11-19 04:58:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:50,697 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 487 transitions. [2023-11-19 04:58:50,697 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) [2023-11-19 04:58:50,697 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 487 transitions. [2023-11-19 04:58:50,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 04:58:50,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:50,721 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-11-19 04:58:50,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 04:58:50,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:50,922 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_process_escape_sequenceErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_process_escape_sequenceErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 04:58:50,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:50,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1381414380, now seen corresponding path program 1 times [2023-11-19 04:58:50,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:50,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764162901] [2023-11-19 04:58:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:50,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:58:51,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:51,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764162901] [2023-11-19 04:58:51,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764162901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:51,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:51,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:58:51,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076214015] [2023-11-19 04:58:51,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:51,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:51,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:51,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:51,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:51,088 INFO L87 Difference]: Start difference. First operand 374 states and 487 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) [2023-11-19 04:58:51,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:51,375 INFO L93 Difference]: Finished difference Result 374 states and 487 transitions. [2023-11-19 04:58:51,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:51,376 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 [2023-11-19 04:58:51,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:51,380 INFO L225 Difference]: With dead ends: 374 [2023-11-19 04:58:51,380 INFO L226 Difference]: Without dead ends: 373 [2023-11-19 04:58:51,381 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 [2023-11-19 04:58:51,382 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 0 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:51,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 830 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:58:51,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-11-19 04:58:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 371. [2023-11-19 04:58:51,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 278 states have (on average 1.4568345323741008) internal successors, (405), 319 states have internal predecessors, (405), 40 states have call successors, (40), 13 states have call predecessors, (40), 13 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-19 04:58:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 484 transitions. [2023-11-19 04:58:51,407 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 484 transitions. Word has length 7 [2023-11-19 04:58:51,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:51,408 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 484 transitions. [2023-11-19 04:58:51,408 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) [2023-11-19 04:58:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 484 transitions. [2023-11-19 04:58:51,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:58:51,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:51,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:51,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:58:51,410 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_process_escape_sequenceErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_process_escape_sequenceErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 04:58:51,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:51,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1032229863, now seen corresponding path program 1 times [2023-11-19 04:58:51,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:51,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234554380] [2023-11-19 04:58:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:51,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:51,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:51,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234554380] [2023-11-19 04:58:51,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234554380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:51,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868853482] [2023-11-19 04:58:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:51,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:51,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:51,577 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:51,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:58:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:51,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:58:51,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:58:51,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:51,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868853482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:51,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:51,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-19 04:58:51,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312321666] [2023-11-19 04:58:51,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:51,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:51,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:58:51,941 INFO L87 Difference]: Start difference. First operand 371 states and 484 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) [2023-11-19 04:58:52,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:52,258 INFO L93 Difference]: Finished difference Result 371 states and 484 transitions. [2023-11-19 04:58:52,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:52,259 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 [2023-11-19 04:58:52,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:52,263 INFO L225 Difference]: With dead ends: 371 [2023-11-19 04:58:52,263 INFO L226 Difference]: Without dead ends: 369 [2023-11-19 04:58:52,263 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 [2023-11-19 04:58:52,265 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 129 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:52,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 696 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:58:52,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-11-19 04:58:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2023-11-19 04:58:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 278 states have (on average 1.4496402877697843) internal successors, (403), 317 states have internal predecessors, (403), 40 states have call successors, (40), 13 states have call predecessors, (40), 13 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-19 04:58:52,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 482 transitions. [2023-11-19 04:58:52,286 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 482 transitions. Word has length 9 [2023-11-19 04:58:52,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:52,287 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 482 transitions. [2023-11-19 04:58:52,287 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) [2023-11-19 04:58:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 482 transitions. [2023-11-19 04:58:52,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:58:52,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:52,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:52,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:52,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:52,503 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_process_escape_sequenceErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_process_escape_sequenceErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 04:58:52,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:52,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1934355687, now seen corresponding path program 1 times [2023-11-19 04:58:52,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:52,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123353432] [2023-11-19 04:58:52,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:52,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:52,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:52,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123353432] [2023-11-19 04:58:52,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123353432] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:52,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606427976] [2023-11-19 04:58:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:52,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:52,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:52,748 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:52,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:58:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:53,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:58:53,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:53,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:53,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606427976] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:53,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1994388185] [2023-11-19 04:58:53,165 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 04:58:53,165 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:53,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:53,176 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:53,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:59:01,928 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 118 for LOIs [2023-11-19 04:59:02,001 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:59:03,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1994388185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:03,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:59:03,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 3, 4] total 14 [2023-11-19 04:59:03,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93347036] [2023-11-19 04:59:03,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:03,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:59:03,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:03,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:59:03,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:59:03,996 INFO L87 Difference]: Start difference. First operand 369 states and 482 transitions. Second operand has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 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) [2023-11-19 04:59:08,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:08,240 INFO L93 Difference]: Finished difference Result 371 states and 483 transitions. [2023-11-19 04:59:08,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:59:08,241 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 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 [2023-11-19 04:59:08,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:08,245 INFO L225 Difference]: With dead ends: 371 [2023-11-19 04:59:08,245 INFO L226 Difference]: Without dead ends: 369 [2023-11-19 04:59:08,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:59:08,248 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 5 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:08,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1709 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-19 04:59:08,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-11-19 04:59:08,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2023-11-19 04:59:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 279 states have (on average 1.4408602150537635) internal successors, (402), 316 states have internal predecessors, (402), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-19 04:59:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 481 transitions. [2023-11-19 04:59:08,289 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 481 transitions. Word has length 10 [2023-11-19 04:59:08,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:08,290 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 481 transitions. [2023-11-19 04:59:08,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 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) [2023-11-19 04:59:08,291 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 481 transitions. [2023-11-19 04:59:08,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:59:08,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:08,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:59:08,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:59:08,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:08,512 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_process_escape_sequenceErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_process_escape_sequenceErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 04:59:08,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:08,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1590588734, now seen corresponding path program 1 times [2023-11-19 04:59:08,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:08,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990262203] [2023-11-19 04:59:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:08,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:59:08,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990262203] [2023-11-19 04:59:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990262203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594676503] [2023-11-19 04:59:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:08,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:08,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:08,773 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:59:08,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:59:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:09,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:59:09,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:59:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:59:09,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:59:09,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594676503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:09,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:59:09,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-19 04:59:09,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534267559] [2023-11-19 04:59:09,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:09,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:09,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:09,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:09,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:59:09,189 INFO L87 Difference]: Start difference. First operand 369 states and 481 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) [2023-11-19 04:59:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:09,558 INFO L93 Difference]: Finished difference Result 369 states and 481 transitions. [2023-11-19 04:59:09,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:09,559 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 [2023-11-19 04:59:09,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:09,562 INFO L225 Difference]: With dead ends: 369 [2023-11-19 04:59:09,563 INFO L226 Difference]: Without dead ends: 368 [2023-11-19 04:59:09,563 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 [2023-11-19 04:59:09,564 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 7 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:09,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 811 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:59:09,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-19 04:59:09,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2023-11-19 04:59:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 279 states have (on average 1.4372759856630823) internal successors, (401), 315 states have internal predecessors, (401), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-19 04:59:09,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 480 transitions. [2023-11-19 04:59:09,593 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 480 transitions. Word has length 15 [2023-11-19 04:59:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:09,594 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 480 transitions. [2023-11-19 04:59:09,594 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) [2023-11-19 04:59:09,595 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 480 transitions. [2023-11-19 04:59:09,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:59:09,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:09,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:59:09,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:59:09,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 04:59:09,803 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_process_escape_sequenceErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_process_escape_sequenceErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 04:59:09,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:09,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1590567924, now seen corresponding path program 1 times [2023-11-19 04:59:09,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:09,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743327196] [2023-11-19 04:59:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:09,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:59:10,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:10,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743327196] [2023-11-19 04:59:10,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743327196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:10,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883834491] [2023-11-19 04:59:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:10,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:10,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:10,038 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:59:10,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:59:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:10,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:59:10,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:59:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:59:10,462 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:59:10,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883834491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:10,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:59:10,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-19 04:59:10,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994946923] [2023-11-19 04:59:10,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:10,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:10,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:10,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:59:10,469 INFO L87 Difference]: Start difference. First operand 368 states and 480 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) [2023-11-19 04:59:10,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:10,819 INFO L93 Difference]: Finished difference Result 368 states and 480 transitions. [2023-11-19 04:59:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:10,820 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 [2023-11-19 04:59:10,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:10,824 INFO L225 Difference]: With dead ends: 368 [2023-11-19 04:59:10,824 INFO L226 Difference]: Without dead ends: 367 [2023-11-19 04:59:10,824 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 [2023-11-19 04:59:10,825 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 2 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:10,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 815 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:59:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-11-19 04:59:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2023-11-19 04:59:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 279 states have (on average 1.4336917562724014) internal successors, (400), 314 states have internal predecessors, (400), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-19 04:59:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 479 transitions. [2023-11-19 04:59:10,851 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 479 transitions. Word has length 15 [2023-11-19 04:59:10,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:10,852 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 479 transitions. [2023-11-19 04:59:10,852 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) [2023-11-19 04:59:10,852 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 479 transitions. [2023-11-19 04:59:10,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:59:10,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:10,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:59:10,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:59:11,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:11,067 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_process_escape_sequenceErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_process_escape_sequenceErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 04:59:11,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:11,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2063611538, now seen corresponding path program 1 times [2023-11-19 04:59:11,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:11,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898832034] [2023-11-19 04:59:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:11,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:59:11,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:11,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898832034] [2023-11-19 04:59:11,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898832034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:11,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050704392] [2023-11-19 04:59:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:11,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:11,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:11,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:59:11,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:59:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:11,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:59:11,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:59:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:59:11,745 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:59:11,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050704392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:11,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:59:11,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-19 04:59:11,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588028603] [2023-11-19 04:59:11,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:11,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:11,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:11,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:11,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:59:11,748 INFO L87 Difference]: Start difference. First operand 367 states and 479 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) [2023-11-19 04:59:12,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:12,106 INFO L93 Difference]: Finished difference Result 375 states and 489 transitions. [2023-11-19 04:59:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:12,106 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 [2023-11-19 04:59:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:12,110 INFO L225 Difference]: With dead ends: 375 [2023-11-19 04:59:12,110 INFO L226 Difference]: Without dead ends: 374 [2023-11-19 04:59:12,110 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 [2023-11-19 04:59:12,111 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 4 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:12,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 814 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:59:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-19 04:59:12,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 373. [2023-11-19 04:59:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 285 states have (on average 1.4350877192982456) internal successors, (409), 320 states have internal predecessors, (409), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-19 04:59:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 488 transitions. [2023-11-19 04:59:12,136 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 488 transitions. Word has length 16 [2023-11-19 04:59:12,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:12,136 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 488 transitions. [2023-11-19 04:59:12,137 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) [2023-11-19 04:59:12,137 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 488 transitions. [2023-11-19 04:59:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:59:12,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:12,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:59:12,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:59:12,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:12,351 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_process_escape_sequenceErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_process_escape_sequenceErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 04:59:12,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:12,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2062966419, now seen corresponding path program 1 times [2023-11-19 04:59:12,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:12,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765609091] [2023-11-19 04:59:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:12,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:59:12,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:12,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765609091] [2023-11-19 04:59:12,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765609091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:12,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174791242] [2023-11-19 04:59:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:12,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:12,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:12,520 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:59:12,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:59:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:12,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:59:12,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:59:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:59:12,915 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:59:12,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174791242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:12,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:59:12,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-19 04:59:12,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047182586] [2023-11-19 04:59:12,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:12,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:12,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:12,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:12,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:59:12,917 INFO L87 Difference]: Start difference. First operand 373 states and 488 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) [2023-11-19 04:59:13,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:13,235 INFO L93 Difference]: Finished difference Result 736 states and 966 transitions. [2023-11-19 04:59:13,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:13,237 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 [2023-11-19 04:59:13,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:13,240 INFO L225 Difference]: With dead ends: 736 [2023-11-19 04:59:13,240 INFO L226 Difference]: Without dead ends: 379 [2023-11-19 04:59:13,242 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 [2023-11-19 04:59:13,242 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 0 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:13,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 816 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:59:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-19 04:59:13,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2023-11-19 04:59:13,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 291 states have (on average 1.4261168384879725) internal successors, (415), 326 states have internal predecessors, (415), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-19 04:59:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 494 transitions. [2023-11-19 04:59:13,267 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 494 transitions. Word has length 16 [2023-11-19 04:59:13,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:13,267 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 494 transitions. [2023-11-19 04:59:13,268 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) [2023-11-19 04:59:13,268 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 494 transitions. [2023-11-19 04:59:13,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 04:59:13,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:13,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:59:13,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 04:59:13,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:13,491 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_process_escape_sequenceErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_process_escape_sequenceErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 04:59:13,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:13,492 INFO L85 PathProgramCache]: Analyzing trace with hash -772464943, now seen corresponding path program 1 times [2023-11-19 04:59:13,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:13,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313577714] [2023-11-19 04:59:13,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:13,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:59:13,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:13,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313577714] [2023-11-19 04:59:13,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313577714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:13,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650895810] [2023-11-19 04:59:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:13,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:13,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:13,637 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:59:13,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 04:59:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:14,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:59:14,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:59:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:59:14,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:59:14,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650895810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:14,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:59:14,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-19 04:59:14,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852139941] [2023-11-19 04:59:14,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:14,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:14,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:14,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:14,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:59:14,042 INFO L87 Difference]: Start difference. First operand 379 states and 494 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) [2023-11-19 04:59:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:14,347 INFO L93 Difference]: Finished difference Result 379 states and 494 transitions. [2023-11-19 04:59:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:14,348 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 [2023-11-19 04:59:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:14,352 INFO L225 Difference]: With dead ends: 379 [2023-11-19 04:59:14,352 INFO L226 Difference]: Without dead ends: 378 [2023-11-19 04:59:14,353 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 [2023-11-19 04:59:14,353 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 2 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:14,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 813 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:59:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-11-19 04:59:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2023-11-19 04:59:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 291 states have (on average 1.422680412371134) internal successors, (414), 325 states have internal predecessors, (414), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-19 04:59:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 493 transitions. [2023-11-19 04:59:14,380 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 493 transitions. Word has length 19 [2023-11-19 04:59:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:14,381 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 493 transitions. [2023-11-19 04:59:14,381 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) [2023-11-19 04:59:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 493 transitions. [2023-11-19 04:59:14,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 04:59:14,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:14,383 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:59:14,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 04:59:14,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:14,599 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_process_escape_sequenceErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_process_escape_sequenceErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 04:59:14,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:14,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1146568881, now seen corresponding path program 1 times [2023-11-19 04:59:14,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:14,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854892158] [2023-11-19 04:59:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:14,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:59:14,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:14,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854892158] [2023-11-19 04:59:14,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854892158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:14,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842544444] [2023-11-19 04:59:14,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:14,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:14,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:14,816 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:59:14,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 04:59:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:15,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:59:15,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:59:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:59:15,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:59:15,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842544444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:15,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:59:15,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-19 04:59:15,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798404651] [2023-11-19 04:59:15,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:15,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:15,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:15,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:59:15,306 INFO L87 Difference]: Start difference. First operand 378 states and 493 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) [2023-11-19 04:59:15,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:15,663 INFO L93 Difference]: Finished difference Result 378 states and 493 transitions. [2023-11-19 04:59:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:15,664 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 [2023-11-19 04:59:15,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:15,668 INFO L225 Difference]: With dead ends: 378 [2023-11-19 04:59:15,668 INFO L226 Difference]: Without dead ends: 377 [2023-11-19 04:59:15,669 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 [2023-11-19 04:59:15,670 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 0 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:15,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 813 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:59:15,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-11-19 04:59:15,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 373. [2023-11-19 04:59:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 287 states have (on average 1.421602787456446) internal successors, (408), 320 states have internal predecessors, (408), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-19 04:59:15,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 487 transitions. [2023-11-19 04:59:15,693 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 487 transitions. Word has length 19 [2023-11-19 04:59:15,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:15,693 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 487 transitions. [2023-11-19 04:59:15,694 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) [2023-11-19 04:59:15,694 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 487 transitions. [2023-11-19 04:59:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 04:59:15,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:15,695 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] [2023-11-19 04:59:15,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 04:59:15,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 04:59:15,920 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_process_escape_sequenceErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_process_escape_sequenceErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 04:59:15,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:15,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1823392003, now seen corresponding path program 1 times [2023-11-19 04:59:15,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:15,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961742649] [2023-11-19 04:59:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:15,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:59:16,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:16,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961742649] [2023-11-19 04:59:16,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961742649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:16,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882555838] [2023-11-19 04:59:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:16,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:16,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:16,074 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:59:16,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 04:59:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:16,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:59:16,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:59:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:59:16,456 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:59:16,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882555838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:16,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:59:16,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-19 04:59:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724764481] [2023-11-19 04:59:16,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:16,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:16,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:16,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:16,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:59:16,458 INFO L87 Difference]: Start difference. First operand 373 states and 487 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-11-19 04:59:16,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:16,746 INFO L93 Difference]: Finished difference Result 377 states and 491 transitions. [2023-11-19 04:59:16,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:16,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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 20 [2023-11-19 04:59:16,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:16,750 INFO L225 Difference]: With dead ends: 377 [2023-11-19 04:59:16,750 INFO L226 Difference]: Without dead ends: 376 [2023-11-19 04:59:16,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:59:16,752 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 0 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:16,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 812 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:59:16,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-11-19 04:59:16,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2023-11-19 04:59:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 290 states have (on average 1.4172413793103449) internal successors, (411), 323 states have internal predecessors, (411), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-19 04:59:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 490 transitions. [2023-11-19 04:59:16,772 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 490 transitions. Word has length 20 [2023-11-19 04:59:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:16,773 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 490 transitions. [2023-11-19 04:59:16,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-11-19 04:59:16,773 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 490 transitions. [2023-11-19 04:59:16,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 04:59:16,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:16,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:59:16,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 04:59:16,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 04:59:16,988 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_process_escape_sequenceErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_process_escape_sequenceErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 04:59:16,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:16,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2073753522, now seen corresponding path program 1 times [2023-11-19 04:59:16,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:16,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713797049] [2023-11-19 04:59:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:16,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:59:17,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:17,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713797049] [2023-11-19 04:59:17,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713797049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:17,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558775357] [2023-11-19 04:59:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:17,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:17,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:17,123 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:59:17,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9525be1a-f360-479e-a783-5b110d6216d9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 04:59:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:17,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:59:17,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:59:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:59:17,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:59:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:59:17,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558775357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:59:17,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1452918383] [2023-11-19 04:59:17,526 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-19 04:59:17,526 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:59:17,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:59:17,527 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:59:17,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:59:23,582 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 118 for LOIs [2023-11-19 04:59:23,626 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:59:26,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1452918383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:26,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:59:26,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4, 3, 4] total 16 [2023-11-19 04:59:26,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981609070] [2023-11-19 04:59:26,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:26,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 04:59:26,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:26,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 04:59:26,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2023-11-19 04:59:26,271 INFO L87 Difference]: Start difference. First operand 376 states and 490 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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)