./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--usb--b2c2--b2c2-flexcop-usb.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff 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_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--usb--b2c2--b2c2-flexcop-usb.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 637058e9c434875c2a607ff053c6fcb810c5a78083685ed0943116abd98a4161 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:56:48,467 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:56:48,596 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-19 04:56:48,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:56:48,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:56:48,671 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:56:48,675 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:56:48,676 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:56:48,678 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:56:48,680 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:56:48,681 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:56:48,681 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:56:48,682 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:56:48,682 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:56:48,685 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:56:48,686 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:56:48,686 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:56:48,687 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:56:48,687 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:56:48,688 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:56:48,688 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:56:48,689 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:56:48,690 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:56:48,691 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:56:48,691 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:56:48,692 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:56:48,693 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:56:48,693 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:56:48,694 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:56:48,694 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 04:56:48,695 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:56:48,695 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:56:48,696 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:56:48,696 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:56:48,696 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:56:48,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:56:48,697 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:56:48,698 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:56:48,698 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:56:48,698 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:56:48,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:56:48,699 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:56:48,699 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:56:48,700 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:56:48,700 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_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 637058e9c434875c2a607ff053c6fcb810c5a78083685ed0943116abd98a4161 [2023-11-19 04:56:49,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:56:49,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:56:49,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:56:49,187 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:56:49,188 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:56:49,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--usb--b2c2--b2c2-flexcop-usb.ko-main.cil.out.i [2023-11-19 04:56:52,869 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:56:53,681 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:56:53,682 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--usb--b2c2--b2c2-flexcop-usb.ko-main.cil.out.i [2023-11-19 04:56:53,753 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/data/10a4d9955/8846895bd5d6475ab75a677275da8eac/FLAG655d53428 [2023-11-19 04:56:53,777 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/data/10a4d9955/8846895bd5d6475ab75a677275da8eac [2023-11-19 04:56:53,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:56:53,790 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:56:53,796 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:56:53,796 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:56:53,803 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:56:53,804 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:56:53" (1/1) ... [2023-11-19 04:56:53,805 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d2b0155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:56:53, skipping insertion in model container [2023-11-19 04:56:53,806 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:56:53" (1/1) ... [2023-11-19 04:56:53,962 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:56:55,405 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:56:55,441 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:56:55,657 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/work/ldvuser/zakharov_benchmarks/bench/cpa/inst/current/envs/linux-3.8-rc1/linux-3.8-rc1/arch/x86/include/asm/paravirt.h"), "i" (825), "i" (12UL)); [6558-6559] [2023-11-19 04:56:55,659 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("771:\n\tcall *%c2;\n772:\n.pushsection .parainstructions,\"a\"\n .balign 8 \n .quad 771b\n .byte %c1\n .byte 772b-771b\n .short %c3\n.popsection\n": "=a" (__eax): [paravirt_typenum] "i" (45UL), [paravirt_opptr] "i" (& pv_irq_ops.save_fl.func), [paravirt_clobber] "i" (1): "memory", "cc"); [6564-6566] [2023-11-19 04:56:55,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:56:55,992 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:56:55,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:56:55 WrapperNode [2023-11-19 04:56:55,993 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:56:55,995 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:56:55,995 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:56:55,995 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:56:56,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:56:55" (1/1) ... [2023-11-19 04:56:56,107 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:56:55" (1/1) ... [2023-11-19 04:56:56,206 INFO L138 Inliner]: procedures = 127, calls = 1011, calls flagged for inlining = 55, calls inlined = 43, statements flattened = 1003 [2023-11-19 04:56:56,206 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:56:56,207 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:56:56,207 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:56:56,207 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:56:56,233 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:56:55" (1/1) ... [2023-11-19 04:56:56,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:56:55" (1/1) ... [2023-11-19 04:56:56,249 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:56:55" (1/1) ... [2023-11-19 04:56:56,250 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:56:55" (1/1) ... [2023-11-19 04:56:56,341 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:56:55" (1/1) ... [2023-11-19 04:56:56,364 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:56:55" (1/1) ... [2023-11-19 04:56:56,392 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:56:55" (1/1) ... [2023-11-19 04:56:56,410 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:56:55" (1/1) ... [2023-11-19 04:56:56,439 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:56:56,441 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:56:56,442 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:56:56,442 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:56:56,443 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:56:55" (1/1) ... [2023-11-19 04:56:56,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:56:56,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:56:56,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:56:56,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:56:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2023-11-19 04:56:56,546 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2023-11-19 04:56:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure flexcop_device_exit [2023-11-19 04:56:56,546 INFO L138 BoogieDeclarations]: Found implementation of procedure flexcop_device_exit [2023-11-19 04:56:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-19 04:56:56,547 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-19 04:56:56,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:56:56,547 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-19 04:56:56,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-19 04:56:56,547 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 04:56:56,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 04:56:56,548 INFO L130 BoogieDeclarations]: Found specification of procedure flexcop_usb_exit [2023-11-19 04:56:56,548 INFO L138 BoogieDeclarations]: Found implementation of procedure flexcop_usb_exit [2023-11-19 04:56:56,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:56:56,549 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 04:56:56,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 04:56:56,549 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-19 04:56:56,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-19 04:56:56,549 INFO L130 BoogieDeclarations]: Found specification of procedure flexcop_device_kfree [2023-11-19 04:56:56,550 INFO L138 BoogieDeclarations]: Found implementation of procedure flexcop_device_kfree [2023-11-19 04:56:56,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:56:56,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:56:56,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:56:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:56:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure flexcop_usb_transfer_exit [2023-11-19 04:56:56,551 INFO L138 BoogieDeclarations]: Found implementation of procedure flexcop_usb_transfer_exit [2023-11-19 04:56:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:56:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 04:56:56,552 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 04:56:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-19 04:56:56,552 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-19 04:56:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:56:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:56:56,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:56:57,052 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:56:57,056 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:56:58,858 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:56:59,409 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:56:59,409 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:56:59,423 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:56:59 BoogieIcfgContainer [2023-11-19 04:56:59,423 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:56:59,426 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:56:59,427 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:56:59,430 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:56:59,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:56:53" (1/3) ... [2023-11-19 04:56:59,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42468aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:56:59, skipping insertion in model container [2023-11-19 04:56:59,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:56:55" (2/3) ... [2023-11-19 04:56:59,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42468aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:56:59, skipping insertion in model container [2023-11-19 04:56:59,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:56:59" (3/3) ... [2023-11-19 04:56:59,434 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--media--usb--b2c2--b2c2-flexcop-usb.ko-main.cil.out.i [2023-11-19 04:56:59,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:56:59,453 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2023-11-19 04:56:59,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:56:59,534 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;@6df6a8ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:56:59,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-11-19 04:56:59,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 199 states, 124 states have (on average 1.532258064516129) internal successors, (190), 154 states have internal predecessors, (190), 37 states have call successors, (37), 12 states have call predecessors, (37), 12 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-11-19 04:56:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:56:59,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:56:59,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:56:59,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-19 04:56:59,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:56:59,560 INFO L85 PathProgramCache]: Analyzing trace with hash 717404037, now seen corresponding path program 1 times [2023-11-19 04:56:59,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:56:59,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972816852] [2023-11-19 04:56:59,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:56:59,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:56:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:57:00,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:00,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972816852] [2023-11-19 04:57:00,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972816852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:00,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:00,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:57:00,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888415566] [2023-11-19 04:57:00,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:00,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:00,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:00,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:00,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:00,250 INFO L87 Difference]: Start difference. First operand has 199 states, 124 states have (on average 1.532258064516129) internal successors, (190), 154 states have internal predecessors, (190), 37 states have call successors, (37), 12 states have call predecessors, (37), 12 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:57:02,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:02,856 INFO L93 Difference]: Finished difference Result 409 states and 559 transitions. [2023-11-19 04:57:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:02,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-19 04:57:02,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:02,878 INFO L225 Difference]: With dead ends: 409 [2023-11-19 04:57:02,879 INFO L226 Difference]: Without dead ends: 190 [2023-11-19 04:57:02,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:02,892 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 23 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:02,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 409 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-19 04:57:02,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-19 04:57:02,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-11-19 04:57:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 146 states have internal predecessors, (186), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-19 04:57:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 254 transitions. [2023-11-19 04:57:02,998 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 254 transitions. Word has length 16 [2023-11-19 04:57:02,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:02,999 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 254 transitions. [2023-11-19 04:57:03,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:57:03,000 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 254 transitions. [2023-11-19 04:57:03,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 04:57:03,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:03,003 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:03,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:57:03,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-19 04:57:03,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:03,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1965241073, now seen corresponding path program 1 times [2023-11-19 04:57:03,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:03,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033686569] [2023-11-19 04:57:03,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:03,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:57:03,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:03,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033686569] [2023-11-19 04:57:03,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033686569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:03,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:03,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:57:03,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283387302] [2023-11-19 04:57:03,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:03,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:03,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:03,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:03,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:03,316 INFO L87 Difference]: Start difference. First operand 190 states and 254 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:57:05,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:05,476 INFO L93 Difference]: Finished difference Result 435 states and 576 transitions. [2023-11-19 04:57:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:05,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-19 04:57:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:05,479 INFO L225 Difference]: With dead ends: 435 [2023-11-19 04:57:05,480 INFO L226 Difference]: Without dead ends: 246 [2023-11-19 04:57:05,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:05,482 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 205 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:05,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 291 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 04:57:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-19 04:57:05,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2023-11-19 04:57:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 164 states have (on average 1.451219512195122) internal successors, (238), 184 states have internal predecessors, (238), 41 states have call successors, (41), 20 states have call predecessors, (41), 20 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-19 04:57:05,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 320 transitions. [2023-11-19 04:57:05,520 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 320 transitions. Word has length 24 [2023-11-19 04:57:05,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:05,520 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 320 transitions. [2023-11-19 04:57:05,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:57:05,521 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 320 transitions. [2023-11-19 04:57:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 04:57:05,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:05,522 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:05,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:57:05,523 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-19 04:57:05,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:05,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1837349448, now seen corresponding path program 1 times [2023-11-19 04:57:05,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:05,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211597413] [2023-11-19 04:57:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:05,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:57:05,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:05,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211597413] [2023-11-19 04:57:05,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211597413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:05,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:05,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:57:05,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408142874] [2023-11-19 04:57:05,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:05,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:05,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:05,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:05,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:05,826 INFO L87 Difference]: Start difference. First operand 244 states and 320 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 04:57:07,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:09,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:10,049 INFO L93 Difference]: Finished difference Result 417 states and 548 transitions. [2023-11-19 04:57:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:10,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-11-19 04:57:10,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:10,054 INFO L225 Difference]: With dead ends: 417 [2023-11-19 04:57:10,055 INFO L226 Difference]: Without dead ends: 415 [2023-11-19 04:57:10,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:10,057 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 192 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:10,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 402 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-19 04:57:10,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-11-19 04:57:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 400. [2023-11-19 04:57:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 281 states have (on average 1.4519572953736655) internal successors, (408), 303 states have internal predecessors, (408), 69 states have call successors, (69), 31 states have call predecessors, (69), 31 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-19 04:57:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 546 transitions. [2023-11-19 04:57:10,094 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 546 transitions. Word has length 26 [2023-11-19 04:57:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:10,095 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 546 transitions. [2023-11-19 04:57:10,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 04:57:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 546 transitions. [2023-11-19 04:57:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-19 04:57:10,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:10,098 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:10,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:57:10,099 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-19 04:57:10,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:10,100 INFO L85 PathProgramCache]: Analyzing trace with hash -389510150, now seen corresponding path program 1 times [2023-11-19 04:57:10,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:10,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343007327] [2023-11-19 04:57:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:10,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:57:10,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:10,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343007327] [2023-11-19 04:57:10,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343007327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:10,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:10,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:57:10,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436535128] [2023-11-19 04:57:10,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:10,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:57:10,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:10,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:57:10,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:57:10,343 INFO L87 Difference]: Start difference. First operand 400 states and 546 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:57:12,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:14,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:16,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:18,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:20,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:20,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:20,874 INFO L93 Difference]: Finished difference Result 954 states and 1289 transitions. [2023-11-19 04:57:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:57:20,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2023-11-19 04:57:20,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:20,881 INFO L225 Difference]: With dead ends: 954 [2023-11-19 04:57:20,881 INFO L226 Difference]: Without dead ends: 709 [2023-11-19 04:57:20,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:57:20,883 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 230 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:20,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 886 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 218 Invalid, 5 Unknown, 0 Unchecked, 10.4s Time] [2023-11-19 04:57:20,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2023-11-19 04:57:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 404. [2023-11-19 04:57:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 285 states have (on average 1.4456140350877194) internal successors, (412), 307 states have internal predecessors, (412), 69 states have call successors, (69), 31 states have call predecessors, (69), 31 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-19 04:57:20,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 550 transitions. [2023-11-19 04:57:20,928 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 550 transitions. Word has length 42 [2023-11-19 04:57:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:20,929 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 550 transitions. [2023-11-19 04:57:20,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:57:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 550 transitions. [2023-11-19 04:57:20,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 04:57:20,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:20,933 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:20,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:57:20,933 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __create_pipeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-19 04:57:20,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:20,934 INFO L85 PathProgramCache]: Analyzing trace with hash 474819204, now seen corresponding path program 1 times [2023-11-19 04:57:20,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:20,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924658298] [2023-11-19 04:57:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:20,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:57:21,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:21,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924658298] [2023-11-19 04:57:21,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924658298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:21,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:21,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:57:21,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052768464] [2023-11-19 04:57:21,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:21,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:57:21,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:21,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:57:21,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:57:21,266 INFO L87 Difference]: Start difference. First operand 404 states and 550 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 04:57:23,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:25,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:26,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:28,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:29,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:30,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:30,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:30,800 INFO L93 Difference]: Finished difference Result 896 states and 1233 transitions. [2023-11-19 04:57:30,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:57:30,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2023-11-19 04:57:30,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:30,805 INFO L225 Difference]: With dead ends: 896 [2023-11-19 04:57:30,806 INFO L226 Difference]: Without dead ends: 502 [2023-11-19 04:57:30,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:57:30,808 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 51 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:30,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 689 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 2 Unknown, 0 Unchecked, 9.5s Time] [2023-11-19 04:57:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-11-19 04:57:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 408. [2023-11-19 04:57:30,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 289 states have (on average 1.439446366782007) internal successors, (416), 311 states have internal predecessors, (416), 69 states have call successors, (69), 31 states have call predecessors, (69), 31 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-19 04:57:30,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 554 transitions. [2023-11-19 04:57:30,844 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 554 transitions. Word has length 48 [2023-11-19 04:57:30,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:30,845 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 554 transitions. [2023-11-19 04:57:30,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 04:57:30,845 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 554 transitions. [2023-11-19 04:57:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 04:57:30,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:30,848 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:30,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:57:30,848 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-19 04:57:30,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:30,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1308393286, now seen corresponding path program 1 times [2023-11-19 04:57:30,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:30,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125765063] [2023-11-19 04:57:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:30,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 04:57:31,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:31,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125765063] [2023-11-19 04:57:31,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125765063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:31,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:31,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:57:31,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277203501] [2023-11-19 04:57:31,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:31,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:31,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:31,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:31,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:31,087 INFO L87 Difference]: Start difference. First operand 408 states and 554 transitions. Second operand has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 04:57:33,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:35,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:35,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:35,306 INFO L93 Difference]: Finished difference Result 830 states and 1137 transitions. [2023-11-19 04:57:35,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:35,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2023-11-19 04:57:35,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:35,310 INFO L225 Difference]: With dead ends: 830 [2023-11-19 04:57:35,310 INFO L226 Difference]: Without dead ends: 432 [2023-11-19 04:57:35,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:35,312 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:35,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 383 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2023-11-19 04:57:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2023-11-19 04:57:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2023-11-19 04:57:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 310 states have (on average 1.429032258064516) internal successors, (443), 332 states have internal predecessors, (443), 72 states have call successors, (72), 31 states have call predecessors, (72), 31 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-19 04:57:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 587 transitions. [2023-11-19 04:57:35,343 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 587 transitions. Word has length 49 [2023-11-19 04:57:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:35,344 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 587 transitions. [2023-11-19 04:57:35,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 04:57:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 587 transitions. [2023-11-19 04:57:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-19 04:57:35,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:35,346 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:35,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:57:35,346 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __create_pipeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-19 04:57:35,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash 966278579, now seen corresponding path program 1 times [2023-11-19 04:57:35,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:35,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221774779] [2023-11-19 04:57:35,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:35,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:57:35,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:35,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221774779] [2023-11-19 04:57:35,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221774779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:35,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:35,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:57:35,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116689406] [2023-11-19 04:57:35,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:35,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:35,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:35,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:35,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:35,544 INFO L87 Difference]: Start difference. First operand 432 states and 587 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 04:57:37,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:39,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:39,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:39,775 INFO L93 Difference]: Finished difference Result 854 states and 1158 transitions. [2023-11-19 04:57:39,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:39,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2023-11-19 04:57:39,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:39,782 INFO L225 Difference]: With dead ends: 854 [2023-11-19 04:57:39,782 INFO L226 Difference]: Without dead ends: 432 [2023-11-19 04:57:39,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:39,784 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 7 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:39,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 371 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2023-11-19 04:57:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2023-11-19 04:57:39,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2023-11-19 04:57:39,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 310 states have (on average 1.4225806451612903) internal successors, (441), 332 states have internal predecessors, (441), 72 states have call successors, (72), 31 states have call predecessors, (72), 31 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-19 04:57:39,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 585 transitions. [2023-11-19 04:57:39,823 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 585 transitions. Word has length 52 [2023-11-19 04:57:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:39,825 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 585 transitions. [2023-11-19 04:57:39,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 04:57:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 585 transitions. [2023-11-19 04:57:39,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 04:57:39,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:39,827 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:39,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:57:39,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-19 04:57:39,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:39,828 INFO L85 PathProgramCache]: Analyzing trace with hash -239762417, now seen corresponding path program 1 times [2023-11-19 04:57:39,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:39,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323812204] [2023-11-19 04:57:39,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:39,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 04:57:40,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:40,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323812204] [2023-11-19 04:57:40,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323812204] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:57:40,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379799793] [2023-11-19 04:57:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:40,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:40,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:40,192 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:57:40,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a4cc57-0d33-4a7a-abaf-525250cfcdc8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:57:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:40,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:57:40,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:57:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 04:57:40,880 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:57:40,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379799793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:40,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:57:40,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3] total 8 [2023-11-19 04:57:40,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706389139] [2023-11-19 04:57:40,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:40,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:57:40,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:40,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:57:40,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:57:40,884 INFO L87 Difference]: Start difference. First operand 432 states and 585 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 04:57:42,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:44,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:46,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:48,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:50,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:52,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:57:54,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []