./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 99f9870c0a11847528222b5446256dd4069d375e1dee3e428847b909838b4c1b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:57:37,598 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:57:37,700 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-21 20:57:37,705 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:57:37,706 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:57:37,732 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:57:37,733 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:57:37,733 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:57:37,734 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 20:57:37,735 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 20:57:37,735 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:57:37,736 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:57:37,736 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:57:37,737 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:57:37,737 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:57:37,738 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:57:37,738 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 20:57:37,739 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:57:37,739 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:57:37,740 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 20:57:37,740 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:57:37,744 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 20:57:37,744 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 20:57:37,745 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:57:37,745 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:57:37,746 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:57:37,746 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:57:37,747 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:57:37,747 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:57:37,748 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:57:37,749 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:57:37,749 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 20:57:37,750 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 20:57:37,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 20:57:37,750 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:57:37,750 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:57:37,750 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 20:57:37,751 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:57:37,751 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:57:37,751 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99f9870c0a11847528222b5446256dd4069d375e1dee3e428847b909838b4c1b [2023-11-21 20:57:38,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:57:38,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:57:38,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:57:38,153 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:57:38,153 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:57:38,155 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i [2023-11-21 20:57:41,358 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 20:57:41,959 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 20:57:41,960 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i [2023-11-21 20:57:42,009 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx/data/c62144aee/ccbbea59102d4b3f93e32979bb1ae136/FLAG648a2d938 [2023-11-21 20:57:42,028 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx/data/c62144aee/ccbbea59102d4b3f93e32979bb1ae136 [2023-11-21 20:57:42,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 20:57:42,041 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 20:57:42,045 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 20:57:42,045 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 20:57:42,051 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 20:57:42,051 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:57:42" (1/1) ... [2023-11-21 20:57:42,053 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@262c1e81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:42, skipping insertion in model container [2023-11-21 20:57:42,053 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:57:42" (1/1) ... [2023-11-21 20:57:42,240 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:57:43,338 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i[164521,164534] [2023-11-21 20:57:43,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:57:43,804 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 20:57:43,980 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %2,%1\n\tsbb %0,%0": "=r" (oldbit), "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [5500-5501] [2023-11-21 20:57:44,093 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i[164521,164534] [2023-11-21 20:57:44,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:57:44,444 INFO L206 MainTranslator]: Completed translation [2023-11-21 20:57:44,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44 WrapperNode [2023-11-21 20:57:44,445 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 20:57:44,447 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 20:57:44,447 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 20:57:44,447 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 20:57:44,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:44,535 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:44,659 INFO L138 Inliner]: procedures = 157, calls = 723, calls flagged for inlining = 61, calls inlined = 52, statements flattened = 1627 [2023-11-21 20:57:44,659 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 20:57:44,660 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 20:57:44,660 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 20:57:44,661 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 20:57:44,673 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:44,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:44,700 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:45,038 WARN L106 HeapSplitter]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure #Ultimate.C_memcpy is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2023-11-21 20:57:45,041 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:45,042 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:45,135 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:45,166 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:45,195 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:45,211 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:45,246 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 20:57:45,249 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 20:57:45,250 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 20:57:45,250 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 20:57:45,251 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:45,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:57:45,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:45,298 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 20:57:45,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763f831c-b58f-4e20-82a3-89be3bd23818/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 20:57:45,345 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_schedule_event [2023-11-21 20:57:45,346 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_schedule_event [2023-11-21 20:57:45,346 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_freebcshw [2023-11-21 20:57:45,346 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_freebcshw [2023-11-21 20:57:45,346 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_set_modem_ctrl [2023-11-21 20:57:45,346 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_set_modem_ctrl [2023-11-21 20:57:45,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-21 20:57:45,347 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-11-21 20:57:45,347 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-11-21 20:57:45,347 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2023-11-21 20:57:45,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2023-11-21 20:57:45,347 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_reinitbcshw [2023-11-21 20:57:45,348 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_reinitbcshw [2023-11-21 20:57:45,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-21 20:57:45,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-21 20:57:45,348 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-21 20:57:45,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-21 20:57:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 20:57:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_m10x_send_skb [2023-11-21 20:57:45,349 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_m10x_send_skb [2023-11-21 20:57:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_brkchars [2023-11-21 20:57:45,349 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_brkchars [2023-11-21 20:57:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2023-11-21 20:57:45,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2023-11-21 20:57:45,350 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_add_event [2023-11-21 20:57:45,350 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_add_event [2023-11-21 20:57:45,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-21 20:57:45,350 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-21 20:57:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-21 20:57:45,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-21 20:57:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-21 20:57:45,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-21 20:57:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2023-11-21 20:57:45,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2023-11-21 20:57:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_close_bchannel [2023-11-21 20:57:45,352 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_close_bchannel [2023-11-21 20:57:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_resume [2023-11-21 20:57:45,352 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_resume [2023-11-21 20:57:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-21 20:57:45,353 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-21 20:57:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_baud_rate [2023-11-21 20:57:45,353 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_baud_rate [2023-11-21 20:57:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_initcshw [2023-11-21 20:57:45,353 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_initcshw [2023-11-21 20:57:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-21 20:57:45,354 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-21 20:57:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 20:57:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-21 20:57:45,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-21 20:57:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-21 20:57:45,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-21 20:57:45,355 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_initbcshw [2023-11-21 20:57:45,355 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_initbcshw [2023-11-21 20:57:45,355 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_dbg_buffer [2023-11-21 20:57:45,355 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_dbg_buffer [2023-11-21 20:57:45,355 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 20:57:45,356 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 20:57:45,356 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_set_line_ctrl [2023-11-21 20:57:45,356 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_set_line_ctrl [2023-11-21 20:57:45,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 20:57:45,357 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2023-11-21 20:57:45,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2023-11-21 20:57:45,357 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_kill [2023-11-21 20:57:45,357 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_kill [2023-11-21 20:57:45,357 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-21 20:57:45,357 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-21 20:57:45,358 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_freecs [2023-11-21 20:57:45,358 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_freecs [2023-11-21 20:57:45,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 20:57:45,358 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_write_room [2023-11-21 20:57:45,358 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_write_room [2023-11-21 20:57:45,359 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_suspend [2023-11-21 20:57:45,359 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_suspend [2023-11-21 20:57:45,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-21 20:57:45,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-21 20:57:45,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 20:57:45,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 20:57:45,360 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_dev [2023-11-21 20:57:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_dev [2023-11-21 20:57:45,360 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-21 20:57:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-21 20:57:45,360 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_8 [2023-11-21 20:57:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_8 [2023-11-21 20:57:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 20:57:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2023-11-21 20:57:45,361 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2023-11-21 20:57:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-11-21 20:57:45,361 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-11-21 20:57:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_freedriver [2023-11-21 20:57:45,362 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_freedriver [2023-11-21 20:57:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_disconnect [2023-11-21 20:57:45,362 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_disconnect [2023-11-21 20:57:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure dev_notice [2023-11-21 20:57:45,362 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_notice [2023-11-21 20:57:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_chars_in_buffer [2023-11-21 20:57:45,363 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_chars_in_buffer [2023-11-21 20:57:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-21 20:57:45,363 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-21 20:57:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 20:57:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 20:57:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_17 [2023-11-21 20:57:45,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_17 [2023-11-21 20:57:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-21 20:57:45,364 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-21 20:57:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_m10x_input [2023-11-21 20:57:45,364 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_m10x_input [2023-11-21 20:57:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-21 20:57:45,365 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-21 20:57:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-21 20:57:45,365 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-21 20:57:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-21 20:57:45,365 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-21 20:57:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure set_value [2023-11-21 20:57:45,366 INFO L138 BoogieDeclarations]: Found implementation of procedure set_value [2023-11-21 20:57:45,366 INFO L130 BoogieDeclarations]: Found specification of procedure tiocm_to_gigaset [2023-11-21 20:57:45,366 INFO L138 BoogieDeclarations]: Found implementation of procedure tiocm_to_gigaset [2023-11-21 20:57:45,366 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2023-11-21 20:57:45,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2023-11-21 20:57:45,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 20:57:45,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-21 20:57:45,367 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-21 20:57:45,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-21 20:57:45,367 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_init_bchannel [2023-11-21 20:57:45,368 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_init_bchannel [2023-11-21 20:57:45,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 20:57:45,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 20:57:45,368 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_read_int_callback [2023-11-21 20:57:45,368 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_read_int_callback [2023-11-21 20:57:45,368 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_freecshw [2023-11-21 20:57:45,369 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_freecshw [2023-11-21 20:57:45,853 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 20:57:45,858 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 20:57:46,291 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-21 20:57:47,284 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2023-11-21 20:57:49,472 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 20:57:50,507 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 20:57:50,507 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 20:57:50,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:57:50 BoogieIcfgContainer [2023-11-21 20:57:50,510 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 20:57:50,513 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 20:57:50,513 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 20:57:50,517 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 20:57:50,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:57:42" (1/3) ... [2023-11-21 20:57:50,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6991855f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:57:50, skipping insertion in model container [2023-11-21 20:57:50,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (2/3) ... [2023-11-21 20:57:50,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6991855f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:57:50, skipping insertion in model container [2023-11-21 20:57:50,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:57:50" (3/3) ... [2023-11-21 20:57:50,522 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i [2023-11-21 20:57:50,542 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 20:57:50,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 20:57:50,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:57:50,641 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=PETRI_NET, 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;@1bc71bcc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:57:50,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 20:57:50,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 682 states, 425 states have (on average 1.3764705882352941) internal successors, (585), 449 states have internal predecessors, (585), 200 states have call successors, (200), 57 states have call predecessors, (200), 55 states have return successors, (194), 189 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-21 20:57:50,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-21 20:57:50,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:50,667 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:50,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:50,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:50,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1235447954, now seen corresponding path program 1 times [2023-11-21 20:57:50,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:50,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119283039] [2023-11-21 20:57:50,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:50,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:51,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:57:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:51,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 20:57:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:51,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 20:57:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:51,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 20:57:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:51,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-21 20:57:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:51,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-21 20:57:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-21 20:57:51,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:51,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119283039] [2023-11-21 20:57:51,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119283039] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:51,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:51,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 20:57:51,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974608204] [2023-11-21 20:57:51,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:51,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 20:57:51,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:51,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 20:57:51,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 20:57:51,664 INFO L87 Difference]: Start difference. First operand has 682 states, 425 states have (on average 1.3764705882352941) internal successors, (585), 449 states have internal predecessors, (585), 200 states have call successors, (200), 57 states have call predecessors, (200), 55 states have return successors, (194), 189 states have call predecessors, (194), 194 states have call successors, (194) Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 20:57:57,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:57,502 INFO L93 Difference]: Finished difference Result 2068 states and 2986 transitions. [2023-11-21 20:57:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:57:57,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2023-11-21 20:57:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:57,538 INFO L225 Difference]: With dead ends: 2068 [2023-11-21 20:57:57,538 INFO L226 Difference]: Without dead ends: 1380 [2023-11-21 20:57:57,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:57:57,552 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 1207 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:57,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1363 Valid, 1279 Invalid, 1780 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [599 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-11-21 20:57:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2023-11-21 20:57:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1294. [2023-11-21 20:57:57,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 815 states have (on average 1.3570552147239263) internal successors, (1106), 842 states have internal predecessors, (1106), 370 states have call successors, (370), 109 states have call predecessors, (370), 108 states have return successors, (365), 355 states have call predecessors, (365), 365 states have call successors, (365) [2023-11-21 20:57:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1841 transitions. [2023-11-21 20:57:57,767 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1841 transitions. Word has length 48 [2023-11-21 20:57:57,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:57,768 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 1841 transitions. [2023-11-21 20:57:57,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 20:57:57,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1841 transitions. [2023-11-21 20:57:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-21 20:57:57,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:57,775 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:57,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 20:57:57,776 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:57,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:57,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1595217284, now seen corresponding path program 1 times [2023-11-21 20:57:57,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:57,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520392165] [2023-11-21 20:57:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:57,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:58,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:57:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:58,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 20:57:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:58,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 20:57:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:58,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 20:57:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:58,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-21 20:57:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:58,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:57:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-21 20:57:58,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:58,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520392165] [2023-11-21 20:57:58,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520392165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:58,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:58,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:57:58,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514350536] [2023-11-21 20:57:58,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:58,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:57:58,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:58,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:57:58,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:57:58,523 INFO L87 Difference]: Start difference. First operand 1294 states and 1841 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:58:06,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:06,193 INFO L93 Difference]: Finished difference Result 2836 states and 4084 transitions. [2023-11-21 20:58:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:58:06,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2023-11-21 20:58:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:06,222 INFO L225 Difference]: With dead ends: 2836 [2023-11-21 20:58:06,223 INFO L226 Difference]: Without dead ends: 2833 [2023-11-21 20:58:06,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:58:06,227 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 1283 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 2123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:06,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1438 Valid, 1500 Invalid, 2123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-11-21 20:58:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2023-11-21 20:58:06,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2515. [2023-11-21 20:58:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2515 states, 1588 states have (on average 1.3570528967254407) internal successors, (2155), 1638 states have internal predecessors, (2155), 712 states have call successors, (712), 217 states have call predecessors, (712), 214 states have return successors, (707), 683 states have call predecessors, (707), 707 states have call successors, (707) [2023-11-21 20:58:06,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2515 states to 2515 states and 3574 transitions. [2023-11-21 20:58:06,490 INFO L78 Accepts]: Start accepts. Automaton has 2515 states and 3574 transitions. Word has length 55 [2023-11-21 20:58:06,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:06,492 INFO L495 AbstractCegarLoop]: Abstraction has 2515 states and 3574 transitions. [2023-11-21 20:58:06,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:58:06,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states and 3574 transitions. [2023-11-21 20:58:06,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-21 20:58:06,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:06,505 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:06,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 20:58:06,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:06,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2088362610, now seen corresponding path program 1 times [2023-11-21 20:58:06,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:06,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146549919] [2023-11-21 20:58:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:06,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:07,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:07,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 20:58:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:07,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 20:58:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:07,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 20:58:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:07,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-21 20:58:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:07,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:58:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-21 20:58:07,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:07,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146549919] [2023-11-21 20:58:07,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146549919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:07,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:07,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:58:07,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188336378] [2023-11-21 20:58:07,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:07,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:58:07,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:07,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:58:07,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:58:07,289 INFO L87 Difference]: Start difference. First operand 2515 states and 3574 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:58:12,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:12,942 INFO L93 Difference]: Finished difference Result 6638 states and 9501 transitions. [2023-11-21 20:58:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:58:12,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 56 [2023-11-21 20:58:12,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:12,981 INFO L225 Difference]: With dead ends: 6638 [2023-11-21 20:58:12,981 INFO L226 Difference]: Without dead ends: 4135 [2023-11-21 20:58:12,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:58:13,003 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 1678 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1827 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:13,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1827 Valid, 1204 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1158 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-21 20:58:13,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4135 states. [2023-11-21 20:58:13,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4135 to 3675. [2023-11-21 20:58:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3675 states, 2328 states have (on average 1.3603951890034365) internal successors, (3167), 2401 states have internal predecessors, (3167), 1026 states have call successors, (1026), 323 states have call predecessors, (1026), 320 states have return successors, (1021), 985 states have call predecessors, (1021), 1021 states have call successors, (1021) [2023-11-21 20:58:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 5214 transitions. [2023-11-21 20:58:13,412 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 5214 transitions. Word has length 56 [2023-11-21 20:58:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:13,417 INFO L495 AbstractCegarLoop]: Abstraction has 3675 states and 5214 transitions. [2023-11-21 20:58:13,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:58:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 5214 transitions. [2023-11-21 20:58:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 20:58:13,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:13,422 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:13,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 20:58:13,423 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:13,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:13,424 INFO L85 PathProgramCache]: Analyzing trace with hash -315217465, now seen corresponding path program 1 times [2023-11-21 20:58:13,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:13,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653539136] [2023-11-21 20:58:13,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:13,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:13,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:13,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 20:58:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:13,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 20:58:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:13,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 20:58:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:13,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-21 20:58:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:13,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:58:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-21 20:58:13,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:13,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653539136] [2023-11-21 20:58:13,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653539136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:13,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:13,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:58:13,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528683184] [2023-11-21 20:58:13,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:13,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:58:13,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:13,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:58:13,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:58:13,797 INFO L87 Difference]: Start difference. First operand 3675 states and 5214 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:58:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:19,719 INFO L93 Difference]: Finished difference Result 5421 states and 7810 transitions. [2023-11-21 20:58:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:58:19,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 57 [2023-11-21 20:58:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:19,769 INFO L225 Difference]: With dead ends: 5421 [2023-11-21 20:58:19,769 INFO L226 Difference]: Without dead ends: 5418 [2023-11-21 20:58:19,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:58:19,775 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 1225 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:19,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 1479 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-11-21 20:58:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2023-11-21 20:58:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4870. [2023-11-21 20:58:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4870 states, 3091 states have (on average 1.3620187641539954) internal successors, (4210), 3191 states have internal predecessors, (4210), 1348 states have call successors, (1348), 425 states have call predecessors, (1348), 430 states have return successors, (1377), 1299 states have call predecessors, (1377), 1343 states have call successors, (1377) [2023-11-21 20:58:20,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4870 states to 4870 states and 6935 transitions. [2023-11-21 20:58:20,250 INFO L78 Accepts]: Start accepts. Automaton has 4870 states and 6935 transitions. Word has length 57 [2023-11-21 20:58:20,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:20,250 INFO L495 AbstractCegarLoop]: Abstraction has 4870 states and 6935 transitions. [2023-11-21 20:58:20,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:58:20,251 INFO L276 IsEmpty]: Start isEmpty. Operand 4870 states and 6935 transitions. [2023-11-21 20:58:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-21 20:58:20,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:20,255 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:20,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 20:58:20,255 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:20,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:20,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1182287951, now seen corresponding path program 1 times [2023-11-21 20:58:20,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:20,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228063155] [2023-11-21 20:58:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:20,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 20:58:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 20:58:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 20:58:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-21 20:58:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:58:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-21 20:58:20,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:20,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228063155] [2023-11-21 20:58:20,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228063155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:20,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:20,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:58:20,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83295392] [2023-11-21 20:58:20,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:20,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:58:20,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:20,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:58:20,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:58:20,597 INFO L87 Difference]: Start difference. First operand 4870 states and 6935 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:58:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:24,761 INFO L93 Difference]: Finished difference Result 5410 states and 7797 transitions. [2023-11-21 20:58:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:58:24,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2023-11-21 20:58:24,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:24,804 INFO L225 Difference]: With dead ends: 5410 [2023-11-21 20:58:24,804 INFO L226 Difference]: Without dead ends: 5407 [2023-11-21 20:58:24,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:58:24,809 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 1022 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:24,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1119 Valid, 1066 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-21 20:58:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2023-11-21 20:58:25,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 4869. [2023-11-21 20:58:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4869 states, 3091 states have (on average 1.3616952442575219) internal successors, (4209), 3190 states have internal predecessors, (4209), 1347 states have call successors, (1347), 425 states have call predecessors, (1347), 430 states have return successors, (1377), 1299 states have call predecessors, (1377), 1343 states have call successors, (1377) [2023-11-21 20:58:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4869 states to 4869 states and 6933 transitions. [2023-11-21 20:58:25,241 INFO L78 Accepts]: Start accepts. Automaton has 4869 states and 6933 transitions. Word has length 58 [2023-11-21 20:58:25,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:25,243 INFO L495 AbstractCegarLoop]: Abstraction has 4869 states and 6933 transitions. [2023-11-21 20:58:25,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:58:25,244 INFO L276 IsEmpty]: Start isEmpty. Operand 4869 states and 6933 transitions. [2023-11-21 20:58:25,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-21 20:58:25,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:25,247 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:25,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 20:58:25,247 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:25,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2003302922, now seen corresponding path program 1 times [2023-11-21 20:58:25,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:25,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462067117] [2023-11-21 20:58:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:25,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:25,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:25,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 20:58:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:25,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 20:58:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:25,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 20:58:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:25,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-21 20:58:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:25,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:58:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-21 20:58:25,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:25,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462067117] [2023-11-21 20:58:25,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462067117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:25,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:25,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:58:25,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316978984] [2023-11-21 20:58:25,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:25,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:58:25,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:25,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:58:25,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:58:25,552 INFO L87 Difference]: Start difference. First operand 4869 states and 6933 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6)