./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/busybox-1.22.0/tac-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/busybox-1.22.0/tac-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e2335f4c07c0129d2e69ffd9d14c59795c6fab06c496c22eabe1dbb307857c96 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:19:34,418 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:19:34,561 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-23 21:19:34,573 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:19:34,574 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:19:34,607 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:19:34,609 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:19:34,610 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:19:34,611 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:19:34,616 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:19:34,617 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:19:34,618 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:19:34,619 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:19:34,621 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:19:34,622 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:19:34,622 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:19:34,623 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:19:34,623 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:19:34,624 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:19:34,625 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:19:34,626 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:19:34,627 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:19:34,629 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:19:34,629 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:19:34,630 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:19:34,630 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:19:34,631 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:19:34,632 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:19:34,632 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:19:34,633 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 21:19:34,634 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:19:34,635 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:19:34,635 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:19:34,636 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:19:34,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:19:34,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:19:34,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:34,637 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:19:34,638 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:19:34,638 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:19:34,638 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:19:34,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:19:34,639 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:19:34,640 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:19:34,640 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:19:34,641 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:19:34,641 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_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2335f4c07c0129d2e69ffd9d14c59795c6fab06c496c22eabe1dbb307857c96 [2023-11-23 21:19:34,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:19:35,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:19:35,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:19:35,031 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:19:35,033 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:19:35,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/busybox-1.22.0/tac-2.i [2023-11-23 21:19:38,314 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:19:38,947 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:19:38,947 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/sv-benchmarks/c/busybox-1.22.0/tac-2.i [2023-11-23 21:19:39,020 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/data/7b67d83fd/64cc29c493274c5894a47ac2544196cb/FLAGbce3f63dc [2023-11-23 21:19:39,046 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/data/7b67d83fd/64cc29c493274c5894a47ac2544196cb [2023-11-23 21:19:39,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:19:39,059 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:19:39,066 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:39,066 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:19:39,074 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:19:39,075 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:39" (1/1) ... [2023-11-23 21:19:39,076 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f7a4cea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:39, skipping insertion in model container [2023-11-23 21:19:39,076 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:39" (1/1) ... [2023-11-23 21:19:39,198 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:19:41,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:41,430 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:19:41,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:41,834 WARN L675 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:19:41,841 WARN L675 CHandler]: The function strerror is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:19:41,842 WARN L675 CHandler]: The function fopen is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:19:41,843 WARN L675 CHandler]: The function strtoul is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:19:41,843 WARN L675 CHandler]: The function fgetc is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:19:41,854 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:19:41,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:41 WrapperNode [2023-11-23 21:19:41,856 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:41,858 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:41,858 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:19:41,858 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:19:41,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:41" (1/1) ... [2023-11-23 21:19:41,993 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:41" (1/1) ... [2023-11-23 21:19:42,153 INFO L138 Inliner]: procedures = 575, calls = 409, calls flagged for inlining = 26, calls inlined = 25, statements flattened = 1712 [2023-11-23 21:19:42,154 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:42,155 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:19:42,156 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:19:42,156 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:19:42,169 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:41" (1/1) ... [2023-11-23 21:19:42,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:41" (1/1) ... [2023-11-23 21:19:42,213 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:41" (1/1) ... [2023-11-23 21:19:42,214 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:41" (1/1) ... [2023-11-23 21:19:42,365 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:41" (1/1) ... [2023-11-23 21:19:42,395 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:41" (1/1) ... [2023-11-23 21:19:42,431 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:41" (1/1) ... [2023-11-23 21:19:42,444 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:41" (1/1) ... [2023-11-23 21:19:42,505 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:19:42,506 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:19:42,519 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:19:42,519 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:19:42,520 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:41" (1/1) ... [2023-11-23 21:19:42,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:42,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:42,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:19:42,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:19:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_realloc [2023-11-23 21:19:42,612 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_realloc [2023-11-23 21:19:42,612 INFO L130 BoogieDeclarations]: Found specification of procedure xrealloc [2023-11-23 21:19:42,614 INFO L138 BoogieDeclarations]: Found implementation of procedure xrealloc [2023-11-23 21:19:42,615 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2023-11-23 21:19:42,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:19:42,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:19:42,615 INFO L130 BoogieDeclarations]: Found specification of procedure bb_verror_msg [2023-11-23 21:19:42,616 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_verror_msg [2023-11-23 21:19:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2023-11-23 21:19:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:19:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:19:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:19:42,617 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-11-23 21:19:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:19:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:19:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:19:42,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:19:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-11-23 21:19:42,620 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-11-23 21:19:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure xmalloc [2023-11-23 21:19:42,622 INFO L138 BoogieDeclarations]: Found implementation of procedure xmalloc [2023-11-23 21:19:42,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:19:42,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:19:42,623 INFO L130 BoogieDeclarations]: Found specification of procedure bb_simple_perror_msg [2023-11-23 21:19:42,623 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_simple_perror_msg [2023-11-23 21:19:42,624 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2023-11-23 21:19:42,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 21:19:42,624 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 21:19:42,624 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:19:42,624 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:19:42,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:19:42,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:19:42,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:19:42,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:19:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure full_write [2023-11-23 21:19:42,626 INFO L138 BoogieDeclarations]: Found implementation of procedure full_write [2023-11-23 21:19:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-11-23 21:19:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure bb_error_msg_and_die [2023-11-23 21:19:42,626 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_error_msg_and_die [2023-11-23 21:19:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:19:43,307 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:19:43,311 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:19:45,424 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:19:46,114 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:19:46,115 INFO L309 CfgBuilder]: Removed 30 assume(true) statements. [2023-11-23 21:19:46,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:46 BoogieIcfgContainer [2023-11-23 21:19:46,117 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:19:46,120 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:19:46,120 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:19:46,125 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:19:46,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:19:39" (1/3) ... [2023-11-23 21:19:46,126 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c64c70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:46, skipping insertion in model container [2023-11-23 21:19:46,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:41" (2/3) ... [2023-11-23 21:19:46,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c64c70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:46, skipping insertion in model container [2023-11-23 21:19:46,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:46" (3/3) ... [2023-11-23 21:19:46,131 INFO L112 eAbstractionObserver]: Analyzing ICFG tac-2.i [2023-11-23 21:19:46,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:19:46,162 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2023-11-23 21:19:46,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:19:46,265 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;@40fe3017, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:19:46,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2023-11-23 21:19:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 428 states, 314 states have (on average 1.694267515923567) internal successors, (532), 387 states have internal predecessors, (532), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-23 21:19:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:19:46,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:46,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:19:46,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 69 more)] === [2023-11-23 21:19:46,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:46,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1722743, now seen corresponding path program 1 times [2023-11-23 21:19:46,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:46,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365015864] [2023-11-23 21:19:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:46,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:19:46,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:46,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365015864] [2023-11-23 21:19:46,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365015864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:46,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:46,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:19:46,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133709986] [2023-11-23 21:19:46,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:46,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:46,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:47,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:47,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:47,031 INFO L87 Difference]: Start difference. First operand has 428 states, 314 states have (on average 1.694267515923567) internal successors, (532), 387 states have internal predecessors, (532), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) 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) [2023-11-23 21:19:47,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:47,595 INFO L93 Difference]: Finished difference Result 848 states and 1197 transitions. [2023-11-23 21:19:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:47,599 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 [2023-11-23 21:19:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:47,618 INFO L225 Difference]: With dead ends: 848 [2023-11-23 21:19:47,618 INFO L226 Difference]: Without dead ends: 422 [2023-11-23 21:19:47,628 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 [2023-11-23 21:19:47,632 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 1 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:47,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 960 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:19:47,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-11-23 21:19:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2023-11-23 21:19:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 310 states have (on average 1.6161290322580646) internal successors, (501), 388 states have internal predecessors, (501), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 21:19:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 556 transitions. [2023-11-23 21:19:47,731 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 556 transitions. Word has length 3 [2023-11-23 21:19:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:47,732 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 556 transitions. [2023-11-23 21:19:47,732 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) [2023-11-23 21:19:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 556 transitions. [2023-11-23 21:19:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 21:19:47,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:47,735 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-23 21:19:47,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:19:47,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 69 more)] === [2023-11-23 21:19:47,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:47,737 INFO L85 PathProgramCache]: Analyzing trace with hash -216988691, now seen corresponding path program 1 times [2023-11-23 21:19:47,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:47,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974122996] [2023-11-23 21:19:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:47,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:19:48,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:48,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974122996] [2023-11-23 21:19:48,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974122996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:48,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595180444] [2023-11-23 21:19:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:48,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:48,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:48,020 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:48,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:19:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:48,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:19:48,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:19:48,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:19:48,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595180444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:48,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:19:48,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-23 21:19:48,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54879865] [2023-11-23 21:19:48,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:48,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:19:48,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:48,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:19:48,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:19:48,512 INFO L87 Difference]: Start difference. First operand 422 states and 556 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) [2023-11-23 21:19:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:48,956 INFO L93 Difference]: Finished difference Result 422 states and 556 transitions. [2023-11-23 21:19:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:19:48,958 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 [2023-11-23 21:19:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:48,963 INFO L225 Difference]: With dead ends: 422 [2023-11-23 21:19:48,964 INFO L226 Difference]: Without dead ends: 421 [2023-11-23 21:19:48,965 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 [2023-11-23 21:19:48,967 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 3 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:48,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 956 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:19:48,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-11-23 21:19:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2023-11-23 21:19:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 310 states have (on average 1.6129032258064515) internal successors, (500), 387 states have internal predecessors, (500), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 21:19:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 555 transitions. [2023-11-23 21:19:49,042 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 555 transitions. Word has length 6 [2023-11-23 21:19:49,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:49,042 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 555 transitions. [2023-11-23 21:19:49,043 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) [2023-11-23 21:19:49,043 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 555 transitions. [2023-11-23 21:19:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:19:49,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:49,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-11-23 21:19:49,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:19:49,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:49,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 69 more)] === [2023-11-23 21:19:49,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:49,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1863285556, now seen corresponding path program 1 times [2023-11-23 21:19:49,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:49,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239118963] [2023-11-23 21:19:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:49,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:19:49,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:49,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239118963] [2023-11-23 21:19:49,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239118963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:49,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:49,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:19:49,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486786398] [2023-11-23 21:19:49,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:49,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:49,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:49,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:49,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:49,461 INFO L87 Difference]: Start difference. First operand 421 states and 555 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) [2023-11-23 21:19:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:49,785 INFO L93 Difference]: Finished difference Result 421 states and 555 transitions. [2023-11-23 21:19:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:49,786 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 [2023-11-23 21:19:49,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:49,790 INFO L225 Difference]: With dead ends: 421 [2023-11-23 21:19:49,790 INFO L226 Difference]: Without dead ends: 420 [2023-11-23 21:19:49,791 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 [2023-11-23 21:19:49,796 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 0 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:49,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 956 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:19:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2023-11-23 21:19:49,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 418. [2023-11-23 21:19:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 308 states have (on average 1.6136363636363635) internal successors, (497), 384 states have internal predecessors, (497), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 21:19:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 552 transitions. [2023-11-23 21:19:49,825 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 552 transitions. Word has length 7 [2023-11-23 21:19:49,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:49,826 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 552 transitions. [2023-11-23 21:19:49,826 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) [2023-11-23 21:19:49,826 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 552 transitions. [2023-11-23 21:19:49,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:19:49,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:49,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:49,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:19:49,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 69 more)] === [2023-11-23 21:19:49,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash 968853659, now seen corresponding path program 1 times [2023-11-23 21:19:49,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:49,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994484102] [2023-11-23 21:19:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:49,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:19:50,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:50,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994484102] [2023-11-23 21:19:50,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994484102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:50,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109921397] [2023-11-23 21:19:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:50,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:50,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:50,015 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:50,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:19:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:50,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:19:50,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:19:50,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:19:50,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109921397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:50,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:19:50,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:19:50,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085501718] [2023-11-23 21:19:50,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:50,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:50,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:50,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:50,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:19:50,323 INFO L87 Difference]: Start difference. First operand 418 states and 552 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) [2023-11-23 21:19:50,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:50,570 INFO L93 Difference]: Finished difference Result 418 states and 552 transitions. [2023-11-23 21:19:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:50,571 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 [2023-11-23 21:19:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:50,575 INFO L225 Difference]: With dead ends: 418 [2023-11-23 21:19:50,575 INFO L226 Difference]: Without dead ends: 416 [2023-11-23 21:19:50,575 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 [2023-11-23 21:19:50,576 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 354 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:50,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 630 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:19:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-11-23 21:19:50,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2023-11-23 21:19:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 308 states have (on average 1.6071428571428572) internal successors, (495), 382 states have internal predecessors, (495), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 21:19:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 550 transitions. [2023-11-23 21:19:50,598 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 550 transitions. Word has length 9 [2023-11-23 21:19:50,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:50,600 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 550 transitions. [2023-11-23 21:19:50,600 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) [2023-11-23 21:19:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 550 transitions. [2023-11-23 21:19:50,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:19:50,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:50,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:50,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:19:50,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:50,819 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 69 more)] === [2023-11-23 21:19:50,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:50,820 INFO L85 PathProgramCache]: Analyzing trace with hash -30307249, now seen corresponding path program 1 times [2023-11-23 21:19:50,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:50,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239277641] [2023-11-23 21:19:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:50,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:19:51,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:51,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239277641] [2023-11-23 21:19:51,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239277641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:51,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124138355] [2023-11-23 21:19:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:51,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:51,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:51,059 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:51,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:19:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:51,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:19:51,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:19:51,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:19:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:19:51,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124138355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:19:51,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1827787043] [2023-11-23 21:19:51,430 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-23 21:19:51,430 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:19:51,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:19:51,440 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:19:51,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:19:59,768 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 114 for LOIs [2023-11-23 21:19:59,819 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:20:01,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1827787043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:01,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:20:01,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 3, 4] total 14 [2023-11-23 21:20:01,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859865161] [2023-11-23 21:20:01,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:01,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:20:01,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:01,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:20:01,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:20:01,656 INFO L87 Difference]: Start difference. First operand 416 states and 550 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) [2023-11-23 21:20:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:05,154 INFO L93 Difference]: Finished difference Result 418 states and 551 transitions. [2023-11-23 21:20:05,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:20:05,155 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 [2023-11-23 21:20:05,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:05,158 INFO L225 Difference]: With dead ends: 418 [2023-11-23 21:20:05,159 INFO L226 Difference]: Without dead ends: 416 [2023-11-23 21:20:05,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:20:05,160 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 5 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:05,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1970 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-23 21:20:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-11-23 21:20:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2023-11-23 21:20:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 309 states have (on average 1.598705501618123) internal successors, (494), 381 states have internal predecessors, (494), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 21:20:05,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 549 transitions. [2023-11-23 21:20:05,187 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 549 transitions. Word has length 10 [2023-11-23 21:20:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:05,188 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 549 transitions. [2023-11-23 21:20:05,188 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) [2023-11-23 21:20:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 549 transitions. [2023-11-23 21:20:05,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:20:05,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:05,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:05,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-23 21:20:05,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:05,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 69 more)] === [2023-11-23 21:20:05,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:05,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1136903128, now seen corresponding path program 1 times [2023-11-23 21:20:05,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:05,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959836361] [2023-11-23 21:20:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:05,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:05,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:05,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959836361] [2023-11-23 21:20:05,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959836361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:05,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049278567] [2023-11-23 21:20:05,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:05,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:05,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:05,572 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:05,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:20:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:05,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:20:05,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:20:05,889 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:20:05,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049278567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:05,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:20:05,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:20:05,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639037462] [2023-11-23 21:20:05,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:05,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:20:05,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:05,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:20:05,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:05,892 INFO L87 Difference]: Start difference. First operand 416 states and 549 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) [2023-11-23 21:20:06,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:06,200 INFO L93 Difference]: Finished difference Result 416 states and 549 transitions. [2023-11-23 21:20:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:20:06,201 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 [2023-11-23 21:20:06,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:06,204 INFO L225 Difference]: With dead ends: 416 [2023-11-23 21:20:06,205 INFO L226 Difference]: Without dead ends: 415 [2023-11-23 21:20:06,205 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 [2023-11-23 21:20:06,206 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 2 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:06,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 943 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:20:06,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-11-23 21:20:06,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2023-11-23 21:20:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 309 states have (on average 1.5954692556634305) internal successors, (493), 380 states have internal predecessors, (493), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 21:20:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 548 transitions. [2023-11-23 21:20:06,231 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 548 transitions. Word has length 15 [2023-11-23 21:20:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:06,232 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 548 transitions. [2023-11-23 21:20:06,232 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) [2023-11-23 21:20:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 548 transitions. [2023-11-23 21:20:06,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:20:06,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:06,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:06,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:06,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:20:06,457 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 69 more)] === [2023-11-23 21:20:06,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:06,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1136857673, now seen corresponding path program 1 times [2023-11-23 21:20:06,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:06,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435380501] [2023-11-23 21:20:06,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:06,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:06,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:06,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435380501] [2023-11-23 21:20:06,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435380501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:06,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410670368] [2023-11-23 21:20:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:06,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:06,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:06,622 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:06,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:20:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:06,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:20:06,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:20:06,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:20:06,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410670368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:06,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:20:06,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:20:06,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456157144] [2023-11-23 21:20:06,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:06,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:20:06,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:06,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:20:06,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:06,954 INFO L87 Difference]: Start difference. First operand 415 states and 548 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) [2023-11-23 21:20:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:07,230 INFO L93 Difference]: Finished difference Result 415 states and 548 transitions. [2023-11-23 21:20:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:20:07,231 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 [2023-11-23 21:20:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:07,235 INFO L225 Difference]: With dead ends: 415 [2023-11-23 21:20:07,235 INFO L226 Difference]: Without dead ends: 414 [2023-11-23 21:20:07,235 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 [2023-11-23 21:20:07,236 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 6 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:07,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 936 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:20:07,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2023-11-23 21:20:07,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2023-11-23 21:20:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 309 states have (on average 1.5922330097087378) internal successors, (492), 379 states have internal predecessors, (492), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 21:20:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 547 transitions. [2023-11-23 21:20:07,266 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 547 transitions. Word has length 15 [2023-11-23 21:20:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:07,267 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 547 transitions. [2023-11-23 21:20:07,267 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) [2023-11-23 21:20:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 547 transitions. [2023-11-23 21:20:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:20:07,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:07,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:07,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:07,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:07,479 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 69 more)] === [2023-11-23 21:20:07,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:07,480 INFO L85 PathProgramCache]: Analyzing trace with hash -838626249, now seen corresponding path program 1 times [2023-11-23 21:20:07,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:07,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638228293] [2023-11-23 21:20:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:07,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:07,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:07,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638228293] [2023-11-23 21:20:07,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638228293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:07,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182953870] [2023-11-23 21:20:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:07,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:07,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:07,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:07,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:20:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:08,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:20:08,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:20:08,022 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:20:08,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182953870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:08,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:20:08,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:20:08,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334750783] [2023-11-23 21:20:08,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:08,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:20:08,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:08,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:20:08,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:08,024 INFO L87 Difference]: Start difference. First operand 414 states and 547 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) [2023-11-23 21:20:08,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:08,250 INFO L93 Difference]: Finished difference Result 416 states and 549 transitions. [2023-11-23 21:20:08,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:20:08,251 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 [2023-11-23 21:20:08,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:08,254 INFO L225 Difference]: With dead ends: 416 [2023-11-23 21:20:08,254 INFO L226 Difference]: Without dead ends: 415 [2023-11-23 21:20:08,254 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 [2023-11-23 21:20:08,255 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 258 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:08,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 705 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:20:08,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-11-23 21:20:08,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 413. [2023-11-23 21:20:08,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 309 states have (on average 1.5889967637540454) internal successors, (491), 378 states have internal predecessors, (491), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 21:20:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 546 transitions. [2023-11-23 21:20:08,278 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 546 transitions. Word has length 16 [2023-11-23 21:20:08,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:08,278 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 546 transitions. [2023-11-23 21:20:08,278 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) [2023-11-23 21:20:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 546 transitions. [2023-11-23 21:20:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:20:08,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:08,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:08,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:08,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:08,501 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 69 more)] === [2023-11-23 21:20:08,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:08,501 INFO L85 PathProgramCache]: Analyzing trace with hash -884258181, now seen corresponding path program 1 times [2023-11-23 21:20:08,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:08,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20259156] [2023-11-23 21:20:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:08,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:08,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:08,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20259156] [2023-11-23 21:20:08,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20259156] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:08,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732996467] [2023-11-23 21:20:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:08,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:08,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:08,625 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:08,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:20:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:08,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:20:08,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:20:08,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:20:08,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732996467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:08,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:20:08,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:20:08,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822810202] [2023-11-23 21:20:08,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:08,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:20:08,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:08,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:20:08,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:08,951 INFO L87 Difference]: Start difference. First operand 413 states and 546 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) [2023-11-23 21:20:09,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:09,243 INFO L93 Difference]: Finished difference Result 817 states and 1084 transitions. [2023-11-23 21:20:09,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:20:09,244 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 [2023-11-23 21:20:09,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:09,248 INFO L225 Difference]: With dead ends: 817 [2023-11-23 21:20:09,248 INFO L226 Difference]: Without dead ends: 416 [2023-11-23 21:20:09,250 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 [2023-11-23 21:20:09,251 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 0 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:09,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 940 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:20:09,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-11-23 21:20:09,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2023-11-23 21:20:09,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 312 states have (on average 1.5833333333333333) internal successors, (494), 381 states have internal predecessors, (494), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 21:20:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 549 transitions. [2023-11-23 21:20:09,275 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 549 transitions. Word has length 16 [2023-11-23 21:20:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:09,276 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 549 transitions. [2023-11-23 21:20:09,276 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) [2023-11-23 21:20:09,276 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 549 transitions. [2023-11-23 21:20:09,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:20:09,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:09,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:09,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:09,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 21:20:09,491 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 69 more)] === [2023-11-23 21:20:09,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:09,492 INFO L85 PathProgramCache]: Analyzing trace with hash -227609497, now seen corresponding path program 1 times [2023-11-23 21:20:09,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:09,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676657896] [2023-11-23 21:20:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:09,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:09,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:09,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676657896] [2023-11-23 21:20:09,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676657896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:09,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937174495] [2023-11-23 21:20:09,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:09,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:09,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:09,617 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:09,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:20:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:09,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:20:09,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:20:09,983 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:20:09,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937174495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:09,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:20:09,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:20:09,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381819850] [2023-11-23 21:20:09,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:09,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:20:09,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:09,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:20:09,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:09,985 INFO L87 Difference]: Start difference. First operand 416 states and 549 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 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) [2023-11-23 21:20:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:10,366 INFO L93 Difference]: Finished difference Result 616 states and 829 transitions. [2023-11-23 21:20:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:20:10,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 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 17 [2023-11-23 21:20:10,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:10,372 INFO L225 Difference]: With dead ends: 616 [2023-11-23 21:20:10,372 INFO L226 Difference]: Without dead ends: 615 [2023-11-23 21:20:10,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:10,373 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 256 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:10,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 929 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:20:10,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-11-23 21:20:10,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 420. [2023-11-23 21:20:10,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 316 states have (on average 1.5791139240506329) internal successors, (499), 385 states have internal predecessors, (499), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 21:20:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 554 transitions. [2023-11-23 21:20:10,401 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 554 transitions. Word has length 17 [2023-11-23 21:20:10,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:10,401 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 554 transitions. [2023-11-23 21:20:10,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 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) [2023-11-23 21:20:10,402 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 554 transitions. [2023-11-23 21:20:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:20:10,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:10,403 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:10,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:10,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:10,617 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 69 more)] === [2023-11-23 21:20:10,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:10,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1900632603, now seen corresponding path program 1 times [2023-11-23 21:20:10,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:10,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907339138] [2023-11-23 21:20:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:10,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:20:10,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:10,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907339138] [2023-11-23 21:20:10,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907339138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:10,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786683655] [2023-11-23 21:20:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:10,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:10,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:10,767 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:10,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:20:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:11,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:20:11,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:20:11,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:20:11,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786683655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:11,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:20:11,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:20:11,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949128458] [2023-11-23 21:20:11,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:11,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:20:11,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:11,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:20:11,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:11,121 INFO L87 Difference]: Start difference. First operand 420 states and 554 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) [2023-11-23 21:20:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:11,439 INFO L93 Difference]: Finished difference Result 420 states and 554 transitions. [2023-11-23 21:20:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:20:11,441 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 [2023-11-23 21:20:11,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:11,444 INFO L225 Difference]: With dead ends: 420 [2023-11-23 21:20:11,444 INFO L226 Difference]: Without dead ends: 419 [2023-11-23 21:20:11,445 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 [2023-11-23 21:20:11,446 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 0 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:11,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 939 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:20:11,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-11-23 21:20:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 417. [2023-11-23 21:20:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 314 states have (on average 1.5796178343949046) internal successors, (496), 382 states have internal predecessors, (496), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 21:20:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 551 transitions. [2023-11-23 21:20:11,478 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 551 transitions. Word has length 19 [2023-11-23 21:20:11,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:11,480 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 551 transitions. [2023-11-23 21:20:11,481 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) [2023-11-23 21:20:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 551 transitions. [2023-11-23 21:20:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:20:11,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:11,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:11,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:11,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:20:11,698 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 69 more)] === [2023-11-23 21:20:11,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:11,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1899223489, now seen corresponding path program 1 times [2023-11-23 21:20:11,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:11,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708347734] [2023-11-23 21:20:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:11,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:20:11,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:11,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708347734] [2023-11-23 21:20:11,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708347734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:11,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617519491] [2023-11-23 21:20:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:11,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:11,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:11,907 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:11,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:20:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:12,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:20:12,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:20:12,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:20:12,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617519491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:12,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:20:12,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:20:12,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539769703] [2023-11-23 21:20:12,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:12,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:20:12,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:12,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:20:12,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:12,292 INFO L87 Difference]: Start difference. First operand 417 states and 551 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) [2023-11-23 21:20:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:12,616 INFO L93 Difference]: Finished difference Result 425 states and 561 transitions. [2023-11-23 21:20:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:20:12,619 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 [2023-11-23 21:20:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:12,622 INFO L225 Difference]: With dead ends: 425 [2023-11-23 21:20:12,623 INFO L226 Difference]: Without dead ends: 424 [2023-11-23 21:20:12,623 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 [2023-11-23 21:20:12,624 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 0 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:12,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 936 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:20:12,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-23 21:20:12,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2023-11-23 21:20:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 321 states have (on average 1.573208722741433) internal successors, (505), 389 states have internal predecessors, (505), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 21:20:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 560 transitions. [2023-11-23 21:20:12,657 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 560 transitions. Word has length 19 [2023-11-23 21:20:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:12,657 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 560 transitions. [2023-11-23 21:20:12,658 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) [2023-11-23 21:20:12,658 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 560 transitions. [2023-11-23 21:20:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:20:12,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:12,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:12,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:12,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:12,878 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 69 more)] === [2023-11-23 21:20:12,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:12,879 INFO L85 PathProgramCache]: Analyzing trace with hash -2142418514, now seen corresponding path program 1 times [2023-11-23 21:20:12,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:12,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780158862] [2023-11-23 21:20:12,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:12,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:20:13,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:13,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780158862] [2023-11-23 21:20:13,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780158862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:13,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326370133] [2023-11-23 21:20:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:13,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:13,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:13,023 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:13,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2288265-888e-4f05-b1c3-c514919cd730/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:20:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:13,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:20:13,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:20:13,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:20:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:20:13,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326370133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:20:13,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [731056850] [2023-11-23 21:20:13,456 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-23 21:20:13,457 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:20:13,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:20:13,457 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:20:13,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:20:18,847 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 114 for LOIs [2023-11-23 21:20:18,891 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:20:21,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [731056850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:21,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:20:21,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4, 3, 4] total 16 [2023-11-23 21:20:21,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632433826] [2023-11-23 21:20:21,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:21,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:20:21,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:21,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:20:21,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2023-11-23 21:20:21,295 INFO L87 Difference]: Start difference. First operand 424 states and 560 transitions. Second operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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)