./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6932181a2a9c8d4d7c700844e1db6a95829edf2ea099e17754a10b04a114b5cd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 04:10:01,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:10:01,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:10:01,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:10:01,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:10:01,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:10:01,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:10:01,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:10:01,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:10:01,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:10:01,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:10:01,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:10:01,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:10:01,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:10:01,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:10:01,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:10:01,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:10:01,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:10:01,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:10:01,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:10:01,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:10:01,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:10:01,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:10:01,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:10:01,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:10:01,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:10:01,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:10:01,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:10:01,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:10:01,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:10:01,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:10:01,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:10:01,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:10:01,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:10:01,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:10:01,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:10:01,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:10:01,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:10:01,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:10:01,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:10:01,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:10:01,390 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 04:10:01,445 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:10:01,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:10:01,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:10:01,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:10:01,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:10:01,450 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:10:01,450 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:10:01,450 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:10:01,451 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:10:01,451 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:10:01,452 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:10:01,453 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:10:01,453 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:10:01,453 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:10:01,454 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:10:01,454 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:10:01,454 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:10:01,454 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:10:01,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:10:01,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:10:01,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:10:01,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:10:01,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:10:01,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:10:01,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:10:01,457 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:10:01,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:10:01,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:10:01,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:10:01,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:10:01,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:10:01,459 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:10:01,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:10:01,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:10:01,461 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:10:01,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:10:01,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:10:01,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:10:01,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6932181a2a9c8d4d7c700844e1db6a95829edf2ea099e17754a10b04a114b5cd [2022-11-03 04:10:01,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:10:01,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:10:01,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:10:01,816 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:10:01,817 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:10:01,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i [2022-11-03 04:10:01,909 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/data/00e6682fb/b95527ad20df474ca5b9572b28740ade/FLAGec06f8ef6 [2022-11-03 04:10:02,971 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:10:02,972 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i [2022-11-03 04:10:03,038 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/data/00e6682fb/b95527ad20df474ca5b9572b28740ade/FLAGec06f8ef6 [2022-11-03 04:10:03,350 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/data/00e6682fb/b95527ad20df474ca5b9572b28740ade [2022-11-03 04:10:03,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:10:03,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:10:03,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:10:03,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:10:03,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:10:03,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:03" (1/1) ... [2022-11-03 04:10:03,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68432f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:03, skipping insertion in model container [2022-11-03 04:10:03,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:03" (1/1) ... [2022-11-03 04:10:03,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:10:03,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:10:05,621 WARN L230 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_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i[213066,213079] [2022-11-03 04:10:05,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:10:05,739 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:10:06,308 WARN L230 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_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i[213066,213079] [2022-11-03 04:10:06,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:10:06,432 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:10:06,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:06 WrapperNode [2022-11-03 04:10:06,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:10:06,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:10:06,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:10:06,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:10:06,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:06" (1/1) ... [2022-11-03 04:10:06,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:06" (1/1) ... [2022-11-03 04:10:06,776 INFO L138 Inliner]: procedures = 222, calls = 2591, calls flagged for inlining = 88, calls inlined = 85, statements flattened = 5016 [2022-11-03 04:10:06,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:10:06,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:10:06,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:10:06,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:10:06,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:06" (1/1) ... [2022-11-03 04:10:06,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:06" (1/1) ... [2022-11-03 04:10:06,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:06" (1/1) ... [2022-11-03 04:10:06,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:06" (1/1) ... [2022-11-03 04:10:07,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:06" (1/1) ... [2022-11-03 04:10:07,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:06" (1/1) ... [2022-11-03 04:10:07,141 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:06" (1/1) ... [2022-11-03 04:10:07,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:06" (1/1) ... [2022-11-03 04:10:07,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:10:07,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:10:07,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:10:07,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:10:07,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:06" (1/1) ... [2022-11-03 04:10:07,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:10:07,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:07,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:10:07,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:10:07,342 INFO L130 BoogieDeclarations]: Found specification of procedure gr_free_dma_desc_chain [2022-11-03 04:10:07,343 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_free_dma_desc_chain [2022-11-03 04:10:07,343 INFO L130 BoogieDeclarations]: Found specification of procedure gr_finish_request [2022-11-03 04:10:07,343 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_finish_request [2022-11-03 04:10:07,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 04:10:07,343 INFO L130 BoogieDeclarations]: Found specification of procedure gr_queue [2022-11-03 04:10:07,344 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_queue [2022-11-03 04:10:07,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 04:10:07,344 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 04:10:07,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 04:10:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure seq_puts [2022-11-03 04:10:07,345 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_puts [2022-11-03 04:10:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 04:10:07,345 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 04:10:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep_halt_wedge [2022-11-03 04:10:07,346 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep_halt_wedge [2022-11-03 04:10:07,346 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-03 04:10:07,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-03 04:10:07,346 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 04:10:07,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 04:10:07,347 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2022-11-03 04:10:07,347 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2022-11-03 04:10:07,347 INFO L130 BoogieDeclarations]: Found specification of procedure usb_speed_string [2022-11-03 04:10:07,347 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_speed_string [2022-11-03 04:10:07,347 INFO L130 BoogieDeclarations]: Found specification of procedure gr_control_stall [2022-11-03 04:10:07,348 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_control_stall [2022-11-03 04:10:07,348 INFO L130 BoogieDeclarations]: Found specification of procedure gr_stop_activity [2022-11-03 04:10:07,348 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_stop_activity [2022-11-03 04:10:07,348 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 04:10:07,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 04:10:07,349 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep_enable [2022-11-03 04:10:07,349 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep_enable [2022-11-03 04:10:07,349 INFO L130 BoogieDeclarations]: Found specification of procedure gr_set_halt_wedge [2022-11-03 04:10:07,349 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_set_halt_wedge [2022-11-03 04:10:07,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 04:10:07,350 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 04:10:07,350 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_1 [2022-11-03 04:10:07,350 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_1 [2022-11-03 04:10:07,350 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 04:10:07,350 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 04:10:07,351 INFO L130 BoogieDeclarations]: Found specification of procedure gr_queue_int [2022-11-03 04:10:07,351 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_queue_int [2022-11-03 04:10:07,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 04:10:07,351 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-03 04:10:07,351 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-03 04:10:07,351 INFO L130 BoogieDeclarations]: Found specification of procedure gr_dequeue [2022-11-03 04:10:07,352 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_dequeue [2022-11-03 04:10:07,353 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep_remove [2022-11-03 04:10:07,353 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep_remove [2022-11-03 04:10:07,355 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32be [2022-11-03 04:10:07,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32be [2022-11-03 04:10:07,355 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_irq [2022-11-03 04:10:07,357 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_irq [2022-11-03 04:10:07,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 04:10:07,357 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-03 04:10:07,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-03 04:10:07,357 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-03 04:10:07,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-03 04:10:07,358 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep0_setup [2022-11-03 04:10:07,359 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep0_setup [2022-11-03 04:10:07,359 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-03 04:10:07,359 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-03 04:10:07,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 04:10:07,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 04:10:07,360 INFO L130 BoogieDeclarations]: Found specification of procedure gr_alloc_request [2022-11-03 04:10:07,360 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_alloc_request [2022-11-03 04:10:07,360 INFO L130 BoogieDeclarations]: Found specification of procedure gr_wakeup [2022-11-03 04:10:07,361 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_wakeup [2022-11-03 04:10:07,361 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_remove [2022-11-03 04:10:07,361 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_remove [2022-11-03 04:10:07,361 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep_reset [2022-11-03 04:10:07,361 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep_reset [2022-11-03 04:10:07,362 INFO L130 BoogieDeclarations]: Found specification of procedure gr_udc_stop [2022-11-03 04:10:07,362 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_udc_stop [2022-11-03 04:10:07,362 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep_nuke [2022-11-03 04:10:07,363 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep_nuke [2022-11-03 04:10:07,363 INFO L130 BoogieDeclarations]: Found specification of procedure gr_fifo_flush [2022-11-03 04:10:07,363 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_fifo_flush [2022-11-03 04:10:07,364 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep_disable [2022-11-03 04:10:07,364 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep_disable [2022-11-03 04:10:07,364 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-03 04:10:07,364 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-03 04:10:07,365 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep0out_requeue [2022-11-03 04:10:07,366 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep0out_requeue [2022-11-03 04:10:07,366 INFO L130 BoogieDeclarations]: Found specification of procedure gr_vbus_connected [2022-11-03 04:10:07,366 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_vbus_connected [2022-11-03 04:10:07,366 INFO L130 BoogieDeclarations]: Found specification of procedure gr_enable_vbus_detect [2022-11-03 04:10:07,366 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_enable_vbus_detect [2022-11-03 04:10:07,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 04:10:07,368 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-11-03 04:10:07,368 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-11-03 04:10:07,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 04:10:07,369 INFO L130 BoogieDeclarations]: Found specification of procedure gr_irq_handler [2022-11-03 04:10:07,370 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_irq_handler [2022-11-03 04:10:07,370 INFO L130 BoogieDeclarations]: Found specification of procedure gr_set_wedge [2022-11-03 04:10:07,370 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_set_wedge [2022-11-03 04:10:07,370 INFO L130 BoogieDeclarations]: Found specification of procedure devm_request_threaded_irq [2022-11-03 04:10:07,371 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_request_threaded_irq [2022-11-03 04:10:07,371 INFO L130 BoogieDeclarations]: Found specification of procedure gr_dfs_open [2022-11-03 04:10:07,371 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_dfs_open [2022-11-03 04:10:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32be [2022-11-03 04:10:07,372 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32be [2022-11-03 04:10:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep0_respond_empty [2022-11-03 04:10:07,373 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep0_respond_empty [2022-11-03 04:10:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 04:10:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure gr_irq [2022-11-03 04:10:07,373 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_irq [2022-11-03 04:10:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep_init [2022-11-03 04:10:07,374 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep_init [2022-11-03 04:10:07,375 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_1 [2022-11-03 04:10:07,375 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_1 [2022-11-03 04:10:07,379 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-03 04:10:07,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-03 04:10:07,379 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2022-11-03 04:10:07,380 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2022-11-03 04:10:07,380 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep0_respond [2022-11-03 04:10:07,381 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep0_respond [2022-11-03 04:10:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 04:10:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2022-11-03 04:10:07,383 INFO L138 BoogieDeclarations]: Found implementation of procedure single_release [2022-11-03 04:10:07,389 INFO L130 BoogieDeclarations]: Found specification of procedure gr_disable_interrupts_and_pullup [2022-11-03 04:10:07,390 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_disable_interrupts_and_pullup [2022-11-03 04:10:07,390 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 04:10:07,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 04:10:07,390 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 04:10:07,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 04:10:07,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 04:10:07,391 INFO L130 BoogieDeclarations]: Found specification of procedure gr_request_irq [2022-11-03 04:10:07,391 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_request_irq [2022-11-03 04:10:07,391 INFO L130 BoogieDeclarations]: Found specification of procedure gr_add_dma_desc [2022-11-03 04:10:07,391 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_add_dma_desc [2022-11-03 04:10:07,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 04:10:07,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 04:10:07,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:10:07,392 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_set_state [2022-11-03 04:10:07,392 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_set_state [2022-11-03 04:10:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure gr_abort_dma [2022-11-03 04:10:07,393 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_abort_dma [2022-11-03 04:10:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 04:10:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep0state_string [2022-11-03 04:10:07,393 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep0state_string [2022-11-03 04:10:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2022-11-03 04:10:07,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2022-11-03 04:10:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure gr_fifo_status [2022-11-03 04:10:07,394 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_fifo_status [2022-11-03 04:10:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 04:10:07,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 04:10:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_2 [2022-11-03 04:10:07,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_2 [2022-11-03 04:10:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure gr_set_address [2022-11-03 04:10:07,395 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_set_address [2022-11-03 04:10:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure gr_dbgprint_request [2022-11-03 04:10:07,395 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_dbgprint_request [2022-11-03 04:10:07,396 INFO L130 BoogieDeclarations]: Found specification of procedure gr_free_request [2022-11-03 04:10:07,396 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_free_request [2022-11-03 04:10:07,396 INFO L130 BoogieDeclarations]: Found specification of procedure gr_udc_start [2022-11-03 04:10:07,396 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_udc_start [2022-11-03 04:10:07,396 INFO L130 BoogieDeclarations]: Found specification of procedure gr_set_ep0state [2022-11-03 04:10:07,396 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_set_ep0state [2022-11-03 04:10:07,397 INFO L130 BoogieDeclarations]: Found specification of procedure platform_set_drvdata [2022-11-03 04:10:07,397 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_set_drvdata [2022-11-03 04:10:07,397 INFO L130 BoogieDeclarations]: Found specification of procedure gr_dma_advance [2022-11-03 04:10:07,397 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_dma_advance [2022-11-03 04:10:07,397 INFO L130 BoogieDeclarations]: Found specification of procedure devm_kzalloc [2022-11-03 04:10:07,398 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_kzalloc [2022-11-03 04:10:07,398 INFO L130 BoogieDeclarations]: Found specification of procedure of_property_read_u32_index [2022-11-03 04:10:07,398 INFO L138 BoogieDeclarations]: Found implementation of procedure of_property_read_u32_index [2022-11-03 04:10:07,398 INFO L130 BoogieDeclarations]: Found specification of procedure gr_get_frame [2022-11-03 04:10:07,398 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_get_frame [2022-11-03 04:10:07,398 INFO L130 BoogieDeclarations]: Found specification of procedure gr_probe [2022-11-03 04:10:07,399 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_probe [2022-11-03 04:10:07,399 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_set_maxpacket_limit [2022-11-03 04:10:07,399 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_set_maxpacket_limit [2022-11-03 04:10:07,399 INFO L130 BoogieDeclarations]: Found specification of procedure gr_remove [2022-11-03 04:10:07,399 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_remove [2022-11-03 04:10:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep0_respond_u16 [2022-11-03 04:10:07,400 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep0_respond_u16 [2022-11-03 04:10:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-03 04:10:07,400 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-03 04:10:07,401 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-03 04:10:07,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-03 04:10:07,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:10:07,402 INFO L130 BoogieDeclarations]: Found specification of procedure gr_start_dma [2022-11-03 04:10:07,402 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_start_dma [2022-11-03 04:10:07,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:10:07,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:10:07,403 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-03 04:10:07,403 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-03 04:10:08,500 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:10:08,509 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:10:10,209 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 04:10:15,337 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:10:16,827 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:10:16,828 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 04:10:16,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:16 BoogieIcfgContainer [2022-11-03 04:10:16,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:10:16,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:10:16,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:10:16,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:10:16,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:10:03" (1/3) ... [2022-11-03 04:10:16,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733c9a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:10:16, skipping insertion in model container [2022-11-03 04:10:16,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:06" (2/3) ... [2022-11-03 04:10:16,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733c9a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:10:16, skipping insertion in model container [2022-11-03 04:10:16,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:16" (3/3) ... [2022-11-03 04:10:16,845 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i [2022-11-03 04:10:16,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:10:16,870 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:10:16,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:10:16,997 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=LoopsAndPotentialCycles, 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;@7af6d44c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:10:16,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:10:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 1185 states, 746 states have (on average 1.376675603217158) internal successors, (1027), 790 states have internal predecessors, (1027), 352 states have call successors, (352), 86 states have call predecessors, (352), 85 states have return successors, (342), 330 states have call predecessors, (342), 342 states have call successors, (342) [2022-11-03 04:10:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 04:10:17,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:17,052 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2022-11-03 04:10:17,053 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:17,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:17,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1747478713, now seen corresponding path program 1 times [2022-11-03 04:10:17,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:17,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165125731] [2022-11-03 04:10:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:17,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-03 04:10:18,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:18,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165125731] [2022-11-03 04:10:18,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165125731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:18,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:18,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:10:18,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928557672] [2022-11-03 04:10:18,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:18,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:10:18,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:18,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:10:18,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:10:18,440 INFO L87 Difference]: Start difference. First operand has 1185 states, 746 states have (on average 1.376675603217158) internal successors, (1027), 790 states have internal predecessors, (1027), 352 states have call successors, (352), 86 states have call predecessors, (352), 85 states have return successors, (342), 330 states have call predecessors, (342), 342 states have call successors, (342) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-03 04:10:20,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:10:23,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:23,507 INFO L93 Difference]: Finished difference Result 3397 states and 5038 transitions. [2022-11-03 04:10:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:10:23,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 132 [2022-11-03 04:10:23,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:23,582 INFO L225 Difference]: With dead ends: 3397 [2022-11-03 04:10:23,582 INFO L226 Difference]: Without dead ends: 2212 [2022-11-03 04:10:23,601 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 [2022-11-03 04:10:23,607 INFO L413 NwaCegarLoop]: 1862 mSDtfsCounter, 1513 mSDsluCounter, 1684 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 3367 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:23,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1513 Valid, 3367 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 398 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 04:10:23,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2022-11-03 04:10:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2209. [2022-11-03 04:10:23,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 1404 states have (on average 1.358974358974359) internal successors, (1908), 1467 states have internal predecessors, (1908), 641 states have call successors, (641), 164 states have call predecessors, (641), 163 states have return successors, (640), 616 states have call predecessors, (640), 640 states have call successors, (640) [2022-11-03 04:10:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3189 transitions. [2022-11-03 04:10:23,900 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3189 transitions. Word has length 132 [2022-11-03 04:10:23,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:23,901 INFO L495 AbstractCegarLoop]: Abstraction has 2209 states and 3189 transitions. [2022-11-03 04:10:23,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-03 04:10:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3189 transitions. [2022-11-03 04:10:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 04:10:23,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:23,914 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 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, 1] [2022-11-03 04:10:23,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:10:23,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash -569477990, now seen corresponding path program 1 times [2022-11-03 04:10:23,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:23,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321435660] [2022-11-03 04:10:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:23,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:10:25,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:25,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321435660] [2022-11-03 04:10:25,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321435660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:25,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:25,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:25,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167959961] [2022-11-03 04:10:25,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:25,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:25,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:25,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:25,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:25,391 INFO L87 Difference]: Start difference. First operand 2209 states and 3189 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:10:27,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:10:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:31,598 INFO L93 Difference]: Finished difference Result 6593 states and 9533 transitions. [2022-11-03 04:10:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:31,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 182 [2022-11-03 04:10:31,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:31,648 INFO L225 Difference]: With dead ends: 6593 [2022-11-03 04:10:31,648 INFO L226 Difference]: Without dead ends: 4411 [2022-11-03 04:10:31,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:31,666 INFO L413 NwaCegarLoop]: 1982 mSDtfsCounter, 1674 mSDsluCounter, 5986 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 7416 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:31,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1678 Valid, 7416 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 771 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 04:10:31,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2022-11-03 04:10:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 4384. [2022-11-03 04:10:32,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 2791 states have (on average 1.361160874238624) internal successors, (3799), 2923 states have internal predecessors, (3799), 1267 states have call successors, (1267), 326 states have call predecessors, (1267), 325 states have return successors, (1274), 1210 states have call predecessors, (1274), 1266 states have call successors, (1274) [2022-11-03 04:10:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 6340 transitions. [2022-11-03 04:10:32,093 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 6340 transitions. Word has length 182 [2022-11-03 04:10:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:32,094 INFO L495 AbstractCegarLoop]: Abstraction has 4384 states and 6340 transitions. [2022-11-03 04:10:32,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:10:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 6340 transitions. [2022-11-03 04:10:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-03 04:10:32,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:32,105 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 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, 1, 1, 1, 1] [2022-11-03 04:10:32,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 04:10:32,106 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:32,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:32,107 INFO L85 PathProgramCache]: Analyzing trace with hash -450827268, now seen corresponding path program 1 times [2022-11-03 04:10:32,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:32,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57114913] [2022-11-03 04:10:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:32,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:10:33,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:33,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57114913] [2022-11-03 04:10:33,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57114913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:33,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:33,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:33,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216885269] [2022-11-03 04:10:33,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:33,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:33,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:33,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:33,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:33,115 INFO L87 Difference]: Start difference. First operand 4384 states and 6340 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:10:34,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:10:36,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:10:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:42,152 INFO L93 Difference]: Finished difference Result 13142 states and 19012 transitions. [2022-11-03 04:10:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:42,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 185 [2022-11-03 04:10:42,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:42,225 INFO L225 Difference]: With dead ends: 13142 [2022-11-03 04:10:42,225 INFO L226 Difference]: Without dead ends: 8785 [2022-11-03 04:10:42,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:42,251 INFO L413 NwaCegarLoop]: 1839 mSDtfsCounter, 1673 mSDsluCounter, 5676 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 6982 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:42,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1677 Valid, 6982 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 737 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2022-11-03 04:10:42,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2022-11-03 04:10:42,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 8742. [2022-11-03 04:10:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 5567 states have (on average 1.3621340039518592) internal successors, (7583), 5847 states have internal predecessors, (7583), 2521 states have call successors, (2521), 654 states have call predecessors, (2521), 653 states have return successors, (2536), 2392 states have call predecessors, (2536), 2520 states have call successors, (2536) [2022-11-03 04:10:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 12640 transitions. [2022-11-03 04:10:42,856 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 12640 transitions. Word has length 185 [2022-11-03 04:10:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:42,859 INFO L495 AbstractCegarLoop]: Abstraction has 8742 states and 12640 transitions. [2022-11-03 04:10:42,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:10:42,860 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 12640 transitions. [2022-11-03 04:10:42,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-03 04:10:42,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:42,876 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 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, 1, 1] [2022-11-03 04:10:42,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 04:10:42,877 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:42,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:42,878 INFO L85 PathProgramCache]: Analyzing trace with hash -603945885, now seen corresponding path program 1 times [2022-11-03 04:10:42,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:42,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979853854] [2022-11-03 04:10:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:42,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:10:43,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:43,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979853854] [2022-11-03 04:10:43,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979853854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:43,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:43,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:43,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168905432] [2022-11-03 04:10:43,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:43,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:43,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:43,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:43,888 INFO L87 Difference]: Start difference. First operand 8742 states and 12640 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:10:45,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:10:50,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:50,563 INFO L93 Difference]: Finished difference Result 20280 states and 29308 transitions. [2022-11-03 04:10:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:50,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 183 [2022-11-03 04:10:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:50,683 INFO L225 Difference]: With dead ends: 20280 [2022-11-03 04:10:50,683 INFO L226 Difference]: Without dead ends: 13177 [2022-11-03 04:10:50,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:50,727 INFO L413 NwaCegarLoop]: 1849 mSDtfsCounter, 1670 mSDsluCounter, 5694 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1674 SdHoareTripleChecker+Valid, 7015 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:50,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1674 Valid, 7015 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 732 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-11-03 04:10:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13177 states. [2022-11-03 04:10:51,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13177 to 13106. [2022-11-03 04:10:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13106 states, 8357 states have (on average 1.3618523393562283) internal successors, (11381), 8763 states have internal predecessors, (11381), 3769 states have call successors, (3769), 980 states have call predecessors, (3769), 979 states have return successors, (3800), 3588 states have call predecessors, (3800), 3768 states have call successors, (3800) [2022-11-03 04:10:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13106 states to 13106 states and 18950 transitions. [2022-11-03 04:10:51,754 INFO L78 Accepts]: Start accepts. Automaton has 13106 states and 18950 transitions. Word has length 183 [2022-11-03 04:10:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:51,756 INFO L495 AbstractCegarLoop]: Abstraction has 13106 states and 18950 transitions. [2022-11-03 04:10:51,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:10:51,757 INFO L276 IsEmpty]: Start isEmpty. Operand 13106 states and 18950 transitions. [2022-11-03 04:10:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-03 04:10:51,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:51,770 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 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, 1, 1, 1] [2022-11-03 04:10:51,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 04:10:51,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:51,773 INFO L85 PathProgramCache]: Analyzing trace with hash 500157821, now seen corresponding path program 1 times [2022-11-03 04:10:51,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:51,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108967558] [2022-11-03 04:10:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:51,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:10:52,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:52,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108967558] [2022-11-03 04:10:52,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108967558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:52,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:52,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:52,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603481356] [2022-11-03 04:10:52,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:52,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:52,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:52,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:52,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:52,627 INFO L87 Difference]: Start difference. First operand 13106 states and 18950 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:10:54,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:10:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:59,840 INFO L93 Difference]: Finished difference Result 24664 states and 35626 transitions. [2022-11-03 04:10:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:59,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 184 [2022-11-03 04:10:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:59,920 INFO L225 Difference]: With dead ends: 24664 [2022-11-03 04:10:59,920 INFO L226 Difference]: Without dead ends: 13193 [2022-11-03 04:10:59,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:59,975 INFO L413 NwaCegarLoop]: 1849 mSDtfsCounter, 1668 mSDsluCounter, 5694 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1672 SdHoareTripleChecker+Valid, 7015 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:59,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1672 Valid, 7015 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 732 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2022-11-03 04:10:59,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13193 states. [2022-11-03 04:11:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13193 to 13122. [2022-11-03 04:11:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13122 states, 8373 states have (on average 1.361160874238624) internal successors, (11397), 8775 states have internal predecessors, (11397), 3765 states have call successors, (3765), 984 states have call predecessors, (3765), 983 states have return successors, (3796), 3588 states have call predecessors, (3796), 3764 states have call successors, (3796) [2022-11-03 04:11:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13122 states to 13122 states and 18958 transitions. [2022-11-03 04:11:00,928 INFO L78 Accepts]: Start accepts. Automaton has 13122 states and 18958 transitions. Word has length 184 [2022-11-03 04:11:00,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:00,929 INFO L495 AbstractCegarLoop]: Abstraction has 13122 states and 18958 transitions. [2022-11-03 04:11:00,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:11:00,929 INFO L276 IsEmpty]: Start isEmpty. Operand 13122 states and 18958 transitions. [2022-11-03 04:11:00,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-03 04:11:00,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:00,943 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 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, 1, 1, 1, 1] [2022-11-03 04:11:00,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 04:11:00,950 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:00,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:00,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1754724506, now seen corresponding path program 1 times [2022-11-03 04:11:00,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:11:00,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369338582] [2022-11-03 04:11:00,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:00,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:11:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:11:01,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:11:01,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369338582] [2022-11-03 04:11:01,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369338582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:01,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:01,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:01,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448907581] [2022-11-03 04:11:01,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:01,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:01,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:11:01,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:01,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:01,794 INFO L87 Difference]: Start difference. First operand 13122 states and 18958 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:11:03,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:11:07,095 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 [] [2022-11-03 04:11:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:09,513 INFO L93 Difference]: Finished difference Result 24628 states and 35550 transitions. [2022-11-03 04:11:09,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:09,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 185 [2022-11-03 04:11:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:09,596 INFO L225 Difference]: With dead ends: 24628 [2022-11-03 04:11:09,596 INFO L226 Difference]: Without dead ends: 13137 [2022-11-03 04:11:09,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:09,654 INFO L413 NwaCegarLoop]: 1849 mSDtfsCounter, 1662 mSDsluCounter, 5691 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 7015 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:09,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1669 Valid, 7015 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 728 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2022-11-03 04:11:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13137 states. [2022-11-03 04:11:10,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13137 to 13078. [2022-11-03 04:11:10,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13078 states, 8341 states have (on average 1.3601486632298285) internal successors, (11345), 8739 states have internal predecessors, (11345), 3753 states have call successors, (3753), 984 states have call predecessors, (3753), 983 states have return successors, (3784), 3580 states have call predecessors, (3784), 3752 states have call successors, (3784) [2022-11-03 04:11:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13078 states to 13078 states and 18882 transitions. [2022-11-03 04:11:10,665 INFO L78 Accepts]: Start accepts. Automaton has 13078 states and 18882 transitions. Word has length 185 [2022-11-03 04:11:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:10,670 INFO L495 AbstractCegarLoop]: Abstraction has 13078 states and 18882 transitions. [2022-11-03 04:11:10,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:11:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 13078 states and 18882 transitions. [2022-11-03 04:11:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-03 04:11:10,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:10,684 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 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, 1, 1, 1, 1, 1] [2022-11-03 04:11:10,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 04:11:10,685 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:10,685 INFO L85 PathProgramCache]: Analyzing trace with hash 959076725, now seen corresponding path program 1 times [2022-11-03 04:11:10,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:11:10,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127513676] [2022-11-03 04:11:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:10,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:11:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:11:11,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:11:11,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127513676] [2022-11-03 04:11:11,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127513676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:11,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:11,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:11,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412854288] [2022-11-03 04:11:11,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:11,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:11,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:11:11,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:11,591 INFO L87 Difference]: Start difference. First operand 13078 states and 18882 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:11:13,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:11:17,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:17,666 INFO L93 Difference]: Finished difference Result 23808 states and 34347 transitions. [2022-11-03 04:11:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:11:17,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 186 [2022-11-03 04:11:17,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:17,738 INFO L225 Difference]: With dead ends: 23808 [2022-11-03 04:11:17,739 INFO L226 Difference]: Without dead ends: 13174 [2022-11-03 04:11:17,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:17,776 INFO L413 NwaCegarLoop]: 1513 mSDtfsCounter, 1667 mSDsluCounter, 3366 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1671 SdHoareTripleChecker+Valid, 4524 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:17,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1671 Valid, 4524 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 554 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-03 04:11:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13174 states. [2022-11-03 04:11:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13174 to 13102. [2022-11-03 04:11:18,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13102 states, 8365 states have (on average 1.3591153616258218) internal successors, (11369), 8757 states have internal predecessors, (11369), 3747 states have call successors, (3747), 990 states have call predecessors, (3747), 989 states have return successors, (3778), 3580 states have call predecessors, (3778), 3746 states have call successors, (3778) [2022-11-03 04:11:18,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13102 states to 13102 states and 18894 transitions. [2022-11-03 04:11:18,842 INFO L78 Accepts]: Start accepts. Automaton has 13102 states and 18894 transitions. Word has length 186 [2022-11-03 04:11:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:18,843 INFO L495 AbstractCegarLoop]: Abstraction has 13102 states and 18894 transitions. [2022-11-03 04:11:18,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:11:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 13102 states and 18894 transitions. [2022-11-03 04:11:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-03 04:11:18,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:18,861 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 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, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:18,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 04:11:18,862 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:18,863 INFO L85 PathProgramCache]: Analyzing trace with hash -405931297, now seen corresponding path program 1 times [2022-11-03 04:11:18,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:11:18,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063217964] [2022-11-03 04:11:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:18,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:11:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:11:19,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:11:19,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063217964] [2022-11-03 04:11:19,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063217964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:19,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:19,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:19,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413201403] [2022-11-03 04:11:19,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:19,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:19,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:11:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:19,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:19,903 INFO L87 Difference]: Start difference. First operand 13102 states and 18894 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:11:21,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:11:26,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 04:11:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:27,249 INFO L93 Difference]: Finished difference Result 24006 states and 34485 transitions. [2022-11-03 04:11:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:11:27,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 187 [2022-11-03 04:11:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:27,318 INFO L225 Difference]: With dead ends: 24006 [2022-11-03 04:11:27,318 INFO L226 Difference]: Without dead ends: 13342 [2022-11-03 04:11:27,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:27,356 INFO L413 NwaCegarLoop]: 1514 mSDtfsCounter, 1652 mSDsluCounter, 3386 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1658 SdHoareTripleChecker+Valid, 4542 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:27,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1658 Valid, 4542 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 556 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 04:11:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13342 states. [2022-11-03 04:11:28,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13342 to 13246. [2022-11-03 04:11:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13246 states, 8449 states have (on average 1.3555450349153746) internal successors, (11453), 8835 states have internal predecessors, (11453), 3753 states have call successors, (3753), 1044 states have call predecessors, (3753), 1043 states have return successors, (3784), 3592 states have call predecessors, (3784), 3752 states have call successors, (3784) [2022-11-03 04:11:28,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13246 states to 13246 states and 18990 transitions. [2022-11-03 04:11:28,383 INFO L78 Accepts]: Start accepts. Automaton has 13246 states and 18990 transitions. Word has length 187 [2022-11-03 04:11:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:28,383 INFO L495 AbstractCegarLoop]: Abstraction has 13246 states and 18990 transitions. [2022-11-03 04:11:28,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:11:28,384 INFO L276 IsEmpty]: Start isEmpty. Operand 13246 states and 18990 transitions. [2022-11-03 04:11:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 04:11:28,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:28,399 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:28,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 04:11:28,400 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:28,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1893865864, now seen corresponding path program 1 times [2022-11-03 04:11:28,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:11:28,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241600754] [2022-11-03 04:11:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:28,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:11:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:11:29,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:11:29,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241600754] [2022-11-03 04:11:29,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241600754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:29,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:29,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:29,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58871107] [2022-11-03 04:11:29,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:29,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:29,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:11:29,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:29,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:29,321 INFO L87 Difference]: Start difference. First operand 13246 states and 18990 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:11:32,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:11:34,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:11:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:38,326 INFO L93 Difference]: Finished difference Result 23772 states and 34003 transitions. [2022-11-03 04:11:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:11:38,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 188 [2022-11-03 04:11:38,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:38,406 INFO L225 Difference]: With dead ends: 23772 [2022-11-03 04:11:38,407 INFO L226 Difference]: Without dead ends: 12958 [2022-11-03 04:11:38,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:38,449 INFO L413 NwaCegarLoop]: 1513 mSDtfsCounter, 1663 mSDsluCounter, 3368 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 4524 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:38,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1667 Valid, 4524 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 555 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2022-11-03 04:11:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12958 states. [2022-11-03 04:11:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12958 to 12904. [2022-11-03 04:11:39,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12904 states, 8228 states have (on average 1.3545211473018959) internal successors, (11145), 8596 states have internal predecessors, (11145), 3639 states have call successors, (3639), 1037 states have call predecessors, (3639), 1036 states have return successors, (3670), 3486 states have call predecessors, (3670), 3638 states have call successors, (3670) [2022-11-03 04:11:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12904 states to 12904 states and 18454 transitions. [2022-11-03 04:11:39,642 INFO L78 Accepts]: Start accepts. Automaton has 12904 states and 18454 transitions. Word has length 188 [2022-11-03 04:11:39,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:39,643 INFO L495 AbstractCegarLoop]: Abstraction has 12904 states and 18454 transitions. [2022-11-03 04:11:39,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 04:11:39,644 INFO L276 IsEmpty]: Start isEmpty. Operand 12904 states and 18454 transitions. [2022-11-03 04:11:39,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-03 04:11:39,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:39,747 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:39,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 04:11:39,748 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:39,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:39,760 INFO L85 PathProgramCache]: Analyzing trace with hash 189405791, now seen corresponding path program 1 times [2022-11-03 04:11:39,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:11:39,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655314428] [2022-11-03 04:11:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:39,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:11:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-03 04:11:41,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:11:41,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655314428] [2022-11-03 04:11:41,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655314428] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:11:41,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220442080] [2022-11-03 04:11:41,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:41,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:11:41,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:11:41,302 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:11:41,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:11:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:43,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 5035 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:11:43,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:11:43,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:43,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220442080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:43,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:11:43,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 04:11:43,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904726569] [2022-11-03 04:11:43,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:43,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:11:43,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:11:43,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:11:43,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:11:43,374 INFO L87 Difference]: Start difference. First operand 12904 states and 18454 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:11:46,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:11:48,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:11:50,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:11:51,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:11:57,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:11:59,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:12:02,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 04:12:05,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:05,797 INFO L93 Difference]: Finished difference Result 30374 states and 43448 transitions. [2022-11-03 04:12:05,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:12:05,798 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 196 [2022-11-03 04:12:05,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:05,907 INFO L225 Difference]: With dead ends: 30374 [2022-11-03 04:12:05,908 INFO L226 Difference]: Without dead ends: 21535 [2022-11-03 04:12:05,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:12:05,950 INFO L413 NwaCegarLoop]: 2444 mSDtfsCounter, 1718 mSDsluCounter, 12535 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1722 SdHoareTripleChecker+Valid, 13700 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:05,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1722 Valid, 13700 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1626 Invalid, 4 Unknown, 0 Unchecked, 21.2s Time] [2022-11-03 04:12:05,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21535 states. [2022-11-03 04:12:07,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21535 to 21408. [2022-11-03 04:12:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21408 states, 13667 states have (on average 1.355601082900417) internal successors, (18527), 14291 states have internal predecessors, (18527), 6015 states have call successors, (6015), 1718 states have call predecessors, (6015), 1725 states have return successors, (6098), 5752 states have call predecessors, (6098), 6014 states have call successors, (6098) [2022-11-03 04:12:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21408 states to 21408 states and 30640 transitions. [2022-11-03 04:12:08,044 INFO L78 Accepts]: Start accepts. Automaton has 21408 states and 30640 transitions. Word has length 196 [2022-11-03 04:12:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:08,046 INFO L495 AbstractCegarLoop]: Abstraction has 21408 states and 30640 transitions. [2022-11-03 04:12:08,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:12:08,047 INFO L276 IsEmpty]: Start isEmpty. Operand 21408 states and 30640 transitions. [2022-11-03 04:12:08,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-11-03 04:12:08,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:08,068 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:08,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:08,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:08,281 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:08,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1079973507, now seen corresponding path program 1 times [2022-11-03 04:12:08,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:12:08,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561493018] [2022-11-03 04:12:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:08,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:12:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:12:09,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:12:09,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561493018] [2022-11-03 04:12:09,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561493018] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:12:09,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127930227] [2022-11-03 04:12:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:09,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:09,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:09,551 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:09,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:12:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:11,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 5037 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:12:11,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:12:11,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:11,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127930227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:11,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:12:11,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-03 04:12:11,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190627622] [2022-11-03 04:12:11,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:11,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:12:11,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:12:11,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:12:11,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:12:11,375 INFO L87 Difference]: Start difference. First operand 21408 states and 30640 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:12:13,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:12:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:26,510 INFO L93 Difference]: Finished difference Result 47426 states and 67860 transitions. [2022-11-03 04:12:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:12:26,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 197 [2022-11-03 04:12:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:26,675 INFO L225 Difference]: With dead ends: 47426 [2022-11-03 04:12:26,675 INFO L226 Difference]: Without dead ends: 30083 [2022-11-03 04:12:26,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:12:26,746 INFO L413 NwaCegarLoop]: 2983 mSDtfsCounter, 1677 mSDsluCounter, 15004 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 16402 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:26,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1681 Valid, 16402 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2032 Invalid, 1 Unknown, 0 Unchecked, 13.4s Time] [2022-11-03 04:12:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30083 states. [2022-11-03 04:12:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30083 to 29932. [2022-11-03 04:12:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29932 states, 19118 states have (on average 1.3558426613662518) internal successors, (25921), 20010 states have internal predecessors, (25921), 8391 states have call successors, (8391), 2399 states have call predecessors, (8391), 2422 states have return successors, (8538), 8014 states have call predecessors, (8538), 8390 states have call successors, (8538) [2022-11-03 04:12:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29932 states to 29932 states and 42850 transitions. [2022-11-03 04:12:29,165 INFO L78 Accepts]: Start accepts. Automaton has 29932 states and 42850 transitions. Word has length 197 [2022-11-03 04:12:29,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:29,166 INFO L495 AbstractCegarLoop]: Abstraction has 29932 states and 42850 transitions. [2022-11-03 04:12:29,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:12:29,166 INFO L276 IsEmpty]: Start isEmpty. Operand 29932 states and 42850 transitions. [2022-11-03 04:12:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-03 04:12:29,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:29,192 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:29,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:29,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 04:12:29,405 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:29,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2074487352, now seen corresponding path program 1 times [2022-11-03 04:12:29,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:12:29,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762550794] [2022-11-03 04:12:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:29,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:12:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:12:31,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:12:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762550794] [2022-11-03 04:12:31,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762550794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:12:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557729874] [2022-11-03 04:12:31,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:31,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:31,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:31,057 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:31,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 04:12:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:32,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 5039 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:12:32,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:12:32,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:32,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557729874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:32,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:12:32,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-03 04:12:32,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405309163] [2022-11-03 04:12:32,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:32,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:12:32,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:12:32,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:12:32,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:12:32,908 INFO L87 Difference]: Start difference. First operand 29932 states and 42850 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:12:35,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:12:44,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 04:12:49,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:49,494 INFO L93 Difference]: Finished difference Result 64466 states and 92264 transitions. [2022-11-03 04:12:49,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:12:49,496 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 198 [2022-11-03 04:12:49,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:49,635 INFO L225 Difference]: With dead ends: 64466 [2022-11-03 04:12:49,635 INFO L226 Difference]: Without dead ends: 38599 [2022-11-03 04:12:49,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:12:49,706 INFO L413 NwaCegarLoop]: 2983 mSDtfsCounter, 1677 mSDsluCounter, 15004 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 16402 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:49,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1681 Valid, 16402 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2032 Invalid, 1 Unknown, 0 Unchecked, 14.3s Time] [2022-11-03 04:12:49,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38599 states. [2022-11-03 04:12:52,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38599 to 29936. [2022-11-03 04:12:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29936 states, 19122 states have (on average 1.3557682250810585) internal successors, (25925), 20010 states have internal predecessors, (25925), 8391 states have call successors, (8391), 2399 states have call predecessors, (8391), 2422 states have return successors, (8538), 8018 states have call predecessors, (8538), 8390 states have call successors, (8538) [2022-11-03 04:12:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29936 states to 29936 states and 42854 transitions. [2022-11-03 04:12:52,387 INFO L78 Accepts]: Start accepts. Automaton has 29936 states and 42854 transitions. Word has length 198 [2022-11-03 04:12:52,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:52,388 INFO L495 AbstractCegarLoop]: Abstraction has 29936 states and 42854 transitions. [2022-11-03 04:12:52,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:12:52,388 INFO L276 IsEmpty]: Start isEmpty. Operand 29936 states and 42854 transitions. [2022-11-03 04:12:52,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-03 04:12:52,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:52,413 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 7, 7, 7, 7, 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, 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] [2022-11-03 04:12:52,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:52,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 04:12:52,641 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:52,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:52,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1469512765, now seen corresponding path program 1 times [2022-11-03 04:12:52,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:12:52,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49919772] [2022-11-03 04:12:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:52,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:12:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-11-03 04:12:53,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:12:53,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49919772] [2022-11-03 04:12:53,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49919772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:53,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:53,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:12:53,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674347415] [2022-11-03 04:12:53,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:53,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:12:53,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:12:53,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:12:53,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:12:53,139 INFO L87 Difference]: Start difference. First operand 29936 states and 42854 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:12:55,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:12:58,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:58,789 INFO L93 Difference]: Finished difference Result 31178 states and 44067 transitions. [2022-11-03 04:12:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:12:58,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 215 [2022-11-03 04:12:58,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:58,877 INFO L225 Difference]: With dead ends: 31178 [2022-11-03 04:12:58,877 INFO L226 Difference]: Without dead ends: 31175 [2022-11-03 04:12:58,887 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 [2022-11-03 04:12:58,888 INFO L413 NwaCegarLoop]: 1530 mSDtfsCounter, 699 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:58,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 2408 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 298 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-11-03 04:12:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31175 states. [2022-11-03 04:13:00,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31175 to 31175. [2022-11-03 04:13:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31175 states, 19770 states have (on average 1.3469903894790085) internal successors, (26630), 20658 states have internal predecessors, (26630), 8637 states have call successors, (8637), 2744 states have call predecessors, (8637), 2767 states have return successors, (8784), 8264 states have call predecessors, (8784), 8636 states have call successors, (8784) [2022-11-03 04:13:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31175 states to 31175 states and 44051 transitions. [2022-11-03 04:13:01,061 INFO L78 Accepts]: Start accepts. Automaton has 31175 states and 44051 transitions. Word has length 215 [2022-11-03 04:13:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:01,062 INFO L495 AbstractCegarLoop]: Abstraction has 31175 states and 44051 transitions. [2022-11-03 04:13:01,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:13:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 31175 states and 44051 transitions. [2022-11-03 04:13:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-03 04:13:01,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:01,089 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:01,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 04:13:01,089 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:01,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1996363900, now seen corresponding path program 1 times [2022-11-03 04:13:01,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:13:01,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882024892] [2022-11-03 04:13:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:13:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:13:02,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:13:02,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882024892] [2022-11-03 04:13:02,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882024892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:13:02,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865737023] [2022-11-03 04:13:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:02,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:13:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:13:02,377 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:13:02,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 04:13:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 5041 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:13:04,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:13:04,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:04,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865737023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:04,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:13:04,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-03 04:13:04,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141893144] [2022-11-03 04:13:04,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:04,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:13:04,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:13:04,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:13:04,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:13:04,264 INFO L87 Difference]: Start difference. First operand 31175 states and 44051 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:13:06,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:13:11,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:13:17,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 04:13:21,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:21,002 INFO L93 Difference]: Finished difference Result 67133 states and 94841 transitions. [2022-11-03 04:13:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:13:21,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 199 [2022-11-03 04:13:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:21,143 INFO L225 Difference]: With dead ends: 67133 [2022-11-03 04:13:21,143 INFO L226 Difference]: Without dead ends: 40198 [2022-11-03 04:13:21,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:13:21,208 INFO L413 NwaCegarLoop]: 2983 mSDtfsCounter, 1677 mSDsluCounter, 15004 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 16402 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:21,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1681 Valid, 16402 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2032 Invalid, 1 Unknown, 0 Unchecked, 14.3s Time] [2022-11-03 04:13:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40198 states. [2022-11-03 04:13:23,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40198 to 31179. [2022-11-03 04:13:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31179 states, 19774 states have (on average 1.3469201982401133) internal successors, (26634), 20658 states have internal predecessors, (26634), 8637 states have call successors, (8637), 2744 states have call predecessors, (8637), 2767 states have return successors, (8784), 8268 states have call predecessors, (8784), 8636 states have call successors, (8784) [2022-11-03 04:13:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31179 states to 31179 states and 44055 transitions. [2022-11-03 04:13:23,391 INFO L78 Accepts]: Start accepts. Automaton has 31179 states and 44055 transitions. Word has length 199 [2022-11-03 04:13:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:23,392 INFO L495 AbstractCegarLoop]: Abstraction has 31179 states and 44055 transitions. [2022-11-03 04:13:23,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:13:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 31179 states and 44055 transitions. [2022-11-03 04:13:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-03 04:13:23,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:23,427 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:23,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:23,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:13:23,653 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:23,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:23,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1095637512, now seen corresponding path program 1 times [2022-11-03 04:13:23,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:13:23,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717813429] [2022-11-03 04:13:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:23,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:13:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-11-03 04:13:24,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:13:24,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717813429] [2022-11-03 04:13:24,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717813429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:13:24,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480702627] [2022-11-03 04:13:24,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:24,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:13:24,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:13:24,921 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:13:24,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 04:13:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:26,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 5047 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:13:26,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:13:26,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:26,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480702627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:26,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:13:26,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 04:13:26,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593145573] [2022-11-03 04:13:26,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:26,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:13:26,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:13:26,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:13:26,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:13:26,696 INFO L87 Difference]: Start difference. First operand 31179 states and 44055 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:13:28,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:13:33,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:13:37,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 04:13:40,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:40,525 INFO L93 Difference]: Finished difference Result 62765 states and 88603 transitions. [2022-11-03 04:13:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:13:40,526 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 202 [2022-11-03 04:13:40,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:40,683 INFO L225 Difference]: With dead ends: 62765 [2022-11-03 04:13:40,684 INFO L226 Difference]: Without dead ends: 46539 [2022-11-03 04:13:40,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:13:40,732 INFO L413 NwaCegarLoop]: 2967 mSDtfsCounter, 1650 mSDsluCounter, 14934 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1657 SdHoareTripleChecker+Valid, 16322 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:40,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1657 Valid, 16322 Invalid, 2007 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 2004 Invalid, 2 Unknown, 0 Unchecked, 11.6s Time] [2022-11-03 04:13:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46539 states. [2022-11-03 04:13:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46539 to 46116. [2022-11-03 04:13:43,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46116 states, 29261 states have (on average 1.3480058781313011) internal successors, (39444), 30576 states have internal predecessors, (39444), 12753 states have call successors, (12753), 4066 states have call predecessors, (12753), 4101 states have return successors, (12988), 12196 states have call predecessors, (12988), 12752 states have call successors, (12988) [2022-11-03 04:13:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46116 states to 46116 states and 65185 transitions. [2022-11-03 04:13:43,512 INFO L78 Accepts]: Start accepts. Automaton has 46116 states and 65185 transitions. Word has length 202 [2022-11-03 04:13:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:43,513 INFO L495 AbstractCegarLoop]: Abstraction has 46116 states and 65185 transitions. [2022-11-03 04:13:43,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:13:43,513 INFO L276 IsEmpty]: Start isEmpty. Operand 46116 states and 65185 transitions. [2022-11-03 04:13:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-03 04:13:43,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:43,530 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:43,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:43,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 04:13:43,753 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:43,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:43,754 INFO L85 PathProgramCache]: Analyzing trace with hash -772440156, now seen corresponding path program 1 times [2022-11-03 04:13:43,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:13:43,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129282161] [2022-11-03 04:13:43,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:43,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:13:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:13:45,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:13:45,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129282161] [2022-11-03 04:13:45,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129282161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:13:45,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009221904] [2022-11-03 04:13:45,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:45,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:13:45,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:13:45,082 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:13:45,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 04:13:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:46,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 5049 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:13:46,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-03 04:13:46,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:46,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009221904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:46,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:13:46,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-03 04:13:46,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796910036] [2022-11-03 04:13:46,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:46,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:13:46,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:13:46,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:13:46,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:13:46,828 INFO L87 Difference]: Start difference. First operand 46116 states and 65185 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:13:48,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:13:56,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:13:58,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 04:14:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:05,409 INFO L93 Difference]: Finished difference Result 92695 states and 130905 transitions. [2022-11-03 04:14:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:14:05,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 203 [2022-11-03 04:14:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:05,645 INFO L225 Difference]: With dead ends: 92695 [2022-11-03 04:14:05,645 INFO L226 Difference]: Without dead ends: 61532 [2022-11-03 04:14:05,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:14:05,724 INFO L413 NwaCegarLoop]: 2976 mSDtfsCounter, 1654 mSDsluCounter, 14959 mSDsCounter, 0 mSdLazyCounter, 2015 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1658 SdHoareTripleChecker+Valid, 16347 SdHoareTripleChecker+Invalid, 2017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2015 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:05,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1658 Valid, 16347 Invalid, 2017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2015 Invalid, 1 Unknown, 0 Unchecked, 15.4s Time] [2022-11-03 04:14:05,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61532 states. [2022-11-03 04:14:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61532 to 61165. [2022-11-03 04:14:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61165 states, 38818 states have (on average 1.3486526868978308) internal successors, (52352), 40578 states have internal predecessors, (52352), 16883 states have call successors, (16883), 5402 states have call predecessors, (16883), 5463 states have return successors, (17206), 16138 states have call predecessors, (17206), 16882 states have call successors, (17206) [2022-11-03 04:14:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61165 states to 61165 states and 86441 transitions. [2022-11-03 04:14:09,177 INFO L78 Accepts]: Start accepts. Automaton has 61165 states and 86441 transitions. Word has length 203 [2022-11-03 04:14:09,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:09,178 INFO L495 AbstractCegarLoop]: Abstraction has 61165 states and 86441 transitions. [2022-11-03 04:14:09,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:14:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 61165 states and 86441 transitions. [2022-11-03 04:14:09,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-11-03 04:14:09,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:09,198 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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] [2022-11-03 04:14:09,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 04:14:09,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558e5611-e2e8-4a88-b81f-bd6ca7a9f7c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 04:14:09,413 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:09,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash -204496161, now seen corresponding path program 1 times [2022-11-03 04:14:09,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:14:09,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343281849] [2022-11-03 04:14:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:09,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:14:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-11-03 04:14:10,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:14:10,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343281849] [2022-11-03 04:14:10,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343281849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:10,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:10,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:14:10,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737602983] [2022-11-03 04:14:10,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:10,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:14:10,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:14:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:14:10,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:14:10,133 INFO L87 Difference]: Start difference. First operand 61165 states and 86441 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 04:14:11,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:14:19,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:19,962 INFO L93 Difference]: Finished difference Result 175721 states and 247882 transitions. [2022-11-03 04:14:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:14:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 211 [2022-11-03 04:14:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:20,819 INFO L225 Difference]: With dead ends: 175721 [2022-11-03 04:14:20,820 INFO L226 Difference]: Without dead ends: 114586 [2022-11-03 04:14:20,987 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 [2022-11-03 04:14:20,987 INFO L413 NwaCegarLoop]: 1927 mSDtfsCounter, 1594 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1594 SdHoareTripleChecker+Valid, 3389 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:20,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1594 Valid, 3389 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-03 04:14:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114586 states.