./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--net--irda--vlsi_ir.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs --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 3be4ac024b7f357f41d231fb5742f86a984717c473cc6044544e39e88c4f03b3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:56:02,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:56:02,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:56:02,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:56:02,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:56:02,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:56:02,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:56:02,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:56:02,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:56:02,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:56:02,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:56:02,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:56:02,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:56:02,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:56:02,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:56:02,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:56:02,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:56:02,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:56:02,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:56:02,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:56:02,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:56:02,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:56:02,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:56:02,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:56:02,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:56:02,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:56:02,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:56:02,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:56:02,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:56:02,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:56:02,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:56:02,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:56:02,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:56:02,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:56:02,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:56:02,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:56:02,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:56:02,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:56:02,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:56:02,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:56:02,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:56:02,736 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:56:02,779 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:56:02,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:56:02,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:56:02,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:56:02,781 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:56:02,781 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:56:02,782 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:56:02,782 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:56:02,782 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:56:02,782 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:56:02,789 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:56:02,790 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:56:02,790 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:56:02,790 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:56:02,790 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:56:02,791 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:56:02,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:56:02,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:56:02,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:56:02,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:56:02,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:56:02,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:56:02,793 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:56:02,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:56:02,793 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:56:02,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:56:02,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:56:02,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:56:02,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:56:02,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:56:02,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:56:02,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:56:02,797 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:56:02,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:56:02,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:56:02,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:56:02,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:56:02,798 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3be4ac024b7f357f41d231fb5742f86a984717c473cc6044544e39e88c4f03b3 [2021-11-19 14:56:03,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:56:03,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:56:03,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:56:03,185 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:56:03,186 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:56:03,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i [2021-11-19 14:56:03,257 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/data/86a42d8ac/7e7a4957116942e280d4c76f8ab745e2/FLAGdcae3859a [2021-11-19 14:56:04,307 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:56:04,309 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i [2021-11-19 14:56:04,369 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/data/86a42d8ac/7e7a4957116942e280d4c76f8ab745e2/FLAGdcae3859a [2021-11-19 14:56:04,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/data/86a42d8ac/7e7a4957116942e280d4c76f8ab745e2 [2021-11-19 14:56:04,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:56:04,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:56:04,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:56:04,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:56:04,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:56:04,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:56:04" (1/1) ... [2021-11-19 14:56:04,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f74ff8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:04, skipping insertion in model container [2021-11-19 14:56:04,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:56:04" (1/1) ... [2021-11-19 14:56:04,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:56:04,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:56:06,862 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_08d087fa-7716-494c-bd30-c94de2664594/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i[293856,293869] [2021-11-19 14:56:06,964 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-19 14:56:06,988 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:56:07,029 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:56:07,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@60bf7a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:07, skipping insertion in model container [2021-11-19 14:56:07,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:56:07,030 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:56:07,032 INFO L158 Benchmark]: Toolchain (without parser) took 2399.34ms. Allocated memory is still 117.4MB. Free memory was 86.1MB in the beginning and 66.1MB in the end (delta: 20.0MB). Peak memory consumption was 71.2MB. Max. memory is 16.1GB. [2021-11-19 14:56:07,033 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 92.3MB. Free memory is still 68.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:56:07,034 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2396.93ms. Allocated memory is still 117.4MB. Free memory was 86.1MB in the beginning and 66.1MB in the end (delta: 20.0MB). Peak memory consumption was 71.2MB. Max. memory is 16.1GB. [2021-11-19 14:56:07,036 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 92.3MB. Free memory is still 68.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2396.93ms. Allocated memory is still 117.4MB. Free memory was 86.1MB in the beginning and 66.1MB in the end (delta: 20.0MB). Peak memory consumption was 71.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7116]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs --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 3be4ac024b7f357f41d231fb5742f86a984717c473cc6044544e39e88c4f03b3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:56:09,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:56:09,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:56:09,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:56:09,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:56:09,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:56:09,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:56:09,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:56:09,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:56:09,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:56:09,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:56:09,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:56:09,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:56:09,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:56:09,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:56:09,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:56:09,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:56:09,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:56:09,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:56:09,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:56:09,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:56:09,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:56:09,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:56:09,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:56:09,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:56:09,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:56:09,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:56:09,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:56:09,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:56:09,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:56:09,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:56:09,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:56:09,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:56:09,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:56:09,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:56:09,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:56:09,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:56:09,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:56:09,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:56:09,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:56:09,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:56:09,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:56:09,524 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:56:09,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:56:09,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:56:09,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:56:09,527 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:56:09,527 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:56:09,527 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:56:09,527 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:56:09,528 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:56:09,528 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:56:09,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:56:09,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:56:09,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:56:09,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:56:09,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:56:09,532 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:56:09,532 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:56:09,532 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:56:09,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:56:09,533 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:56:09,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:56:09,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:56:09,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:56:09,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:56:09,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:56:09,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:56:09,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:56:09,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:56:09,535 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:56:09,535 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:56:09,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:56:09,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:56:09,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:56:09,536 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3be4ac024b7f357f41d231fb5742f86a984717c473cc6044544e39e88c4f03b3 [2021-11-19 14:56:09,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:56:09,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:56:09,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:56:09,935 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:56:09,936 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:56:09,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i [2021-11-19 14:56:10,008 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/data/9e710aa20/5c18d34b0ce14c11af6431e73ce4d409/FLAGc19139f5d [2021-11-19 14:56:11,079 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:56:11,081 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i [2021-11-19 14:56:11,130 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/data/9e710aa20/5c18d34b0ce14c11af6431e73ce4d409/FLAGc19139f5d [2021-11-19 14:56:11,429 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/data/9e710aa20/5c18d34b0ce14c11af6431e73ce4d409 [2021-11-19 14:56:11,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:56:11,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:56:11,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:56:11,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:56:11,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:56:11,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:56:11" (1/1) ... [2021-11-19 14:56:11,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b2082fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:11, skipping insertion in model container [2021-11-19 14:56:11,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:56:11" (1/1) ... [2021-11-19 14:56:11,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:56:11,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:56:14,004 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_08d087fa-7716-494c-bd30-c94de2664594/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i[293856,293869] [2021-11-19 14:56:14,052 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-19 14:56:14,069 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:56:14,103 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:56:14,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:56:14,548 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_08d087fa-7716-494c-bd30-c94de2664594/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i[293856,293869] [2021-11-19 14:56:14,553 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-19 14:56:14,560 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:56:14,588 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:56:15,056 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_08d087fa-7716-494c-bd30-c94de2664594/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i[293856,293869] [2021-11-19 14:56:15,093 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-19 14:56:15,097 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:56:15,230 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:56:15,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:15 WrapperNode [2021-11-19 14:56:15,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:56:15,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:56:15,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:56:15,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:56:15,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:15" (1/1) ... [2021-11-19 14:56:15,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:15" (1/1) ... [2021-11-19 14:56:15,571 INFO L137 Inliner]: procedures = 289, calls = 1982, calls flagged for inlining = 131, calls inlined = 123, statements flattened = 4381 [2021-11-19 14:56:15,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:56:15,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:56:15,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:56:15,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:56:15,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:15" (1/1) ... [2021-11-19 14:56:15,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:15" (1/1) ... [2021-11-19 14:56:15,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:15" (1/1) ... [2021-11-19 14:56:15,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:15" (1/1) ... [2021-11-19 14:56:15,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:15" (1/1) ... [2021-11-19 14:56:15,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:15" (1/1) ... [2021-11-19 14:56:15,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:15" (1/1) ... [2021-11-19 14:56:15,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:56:15,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:56:15,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:56:15,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:56:15,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:15" (1/1) ... [2021-11-19 14:56:15,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:56:15,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:56:15,883 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:56:15,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:56:15,936 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-19 14:56:15,936 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-19 14:56:15,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:56:15,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:56:15,937 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_shutdown_2 [2021-11-19 14:56:15,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_shutdown_2 [2021-11-19 14:56:15,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:56:15,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 14:56:15,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 14:56:15,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 14:56:15,937 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-19 14:56:15,938 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-19 14:56:15,938 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 14:56:15,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 14:56:15,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 14:56:15,938 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 14:56:15,938 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-19 14:56:15,938 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-19 14:56:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-19 14:56:15,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-19 14:56:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure rd_get_count [2021-11-19 14:56:15,939 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_get_count [2021-11-19 14:56:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 14:56:15,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 14:56:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_byte [2021-11-19 14:56:15,940 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_byte [2021-11-19 14:56:15,940 INFO L130 BoogieDeclarations]: Found specification of procedure rd_set_status [2021-11-19 14:56:15,940 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_set_status [2021-11-19 14:56:15,940 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-19 14:56:15,940 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-19 14:56:15,940 INFO L130 BoogieDeclarations]: Found specification of procedure rd_get_status [2021-11-19 14:56:15,940 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_get_status [2021-11-19 14:56:15,941 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_cpu [2021-11-19 14:56:15,941 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_cpu [2021-11-19 14:56:15,941 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-19 14:56:15,941 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-19 14:56:15,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-19 14:56:15,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-19 14:56:15,942 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_ring_debug [2021-11-19 14:56:15,942 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_ring_debug [2021-11-19 14:56:15,942 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-19 14:56:15,942 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-19 14:56:15,942 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-19 14:56:15,943 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-19 14:56:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:56:15,943 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:56:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:56:15,944 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:56:15,945 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-19 14:56:15,945 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-19 14:56:15,945 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-19 14:56:15,945 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-19 14:56:15,946 INFO L130 BoogieDeclarations]: Found specification of procedure ktime_get [2021-11-19 14:56:15,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ktime_get [2021-11-19 14:56:15,946 INFO L130 BoogieDeclarations]: Found specification of procedure ring_get [2021-11-19 14:56:15,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ring_get [2021-11-19 14:56:15,946 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-19 14:56:15,946 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-19 14:56:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:56:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_irda_resume [2021-11-19 14:56:15,947 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_irda_resume [2021-11-19 14:56:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-19 14:56:15,948 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-19 14:56:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:56:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-19 14:56:15,948 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-19 14:56:15,949 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-19 14:56:15,949 INFO L130 BoogieDeclarations]: Found specification of procedure remove_proc_entry [2021-11-19 14:56:15,949 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_proc_entry [2021-11-19 14:56:15,949 INFO L130 BoogieDeclarations]: Found specification of procedure ktime_us_delta [2021-11-19 14:56:15,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ktime_us_delta [2021-11-19 14:56:15,950 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-19 14:56:15,950 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-19 14:56:15,950 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_free_ring [2021-11-19 14:56:15,950 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_free_ring [2021-11-19 14:56:15,950 INFO L130 BoogieDeclarations]: Found specification of procedure ring_last [2021-11-19 14:56:15,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ring_last [2021-11-19 14:56:15,950 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-19 14:56:15,951 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-19 14:56:15,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:56:15,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 14:56:15,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 14:56:15,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:56:15,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:56:15,952 INFO L130 BoogieDeclarations]: Found specification of procedure ring_put [2021-11-19 14:56:15,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ring_put [2021-11-19 14:56:15,952 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-11-19 14:56:15,953 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-11-19 14:56:15,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:56:15,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:56:15,954 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-19 14:56:15,954 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-19 14:56:15,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:56:15,954 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2021-11-19 14:56:15,954 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2021-11-19 14:56:15,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 14:56:15,954 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-19 14:56:15,954 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-19 14:56:15,955 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~TO~VOID [2021-11-19 14:56:15,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~TO~VOID [2021-11-19 14:56:15,955 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_tx_timeout [2021-11-19 14:56:15,955 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_tx_timeout [2021-11-19 14:56:15,955 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-19 14:56:15,956 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-19 14:56:15,956 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-19 14:56:15,956 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-19 14:56:15,956 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-19 14:56:15,956 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-19 14:56:15,957 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-19 14:56:15,957 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-19 14:56:15,960 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-19 14:56:15,960 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-19 14:56:15,960 INFO L130 BoogieDeclarations]: Found specification of procedure rd_set_addr_status [2021-11-19 14:56:15,961 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_set_addr_status [2021-11-19 14:56:15,962 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_destroy_hwif [2021-11-19 14:56:15,963 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_destroy_hwif [2021-11-19 14:56:15,963 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-19 14:56:15,963 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-19 14:56:15,964 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_stop_hw [2021-11-19 14:56:15,969 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_stop_hw [2021-11-19 14:56:15,970 INFO L130 BoogieDeclarations]: Found specification of procedure rd_get_addr [2021-11-19 14:56:15,970 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_get_addr [2021-11-19 14:56:15,970 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-19 14:56:15,970 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-19 14:56:15,970 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-19 14:56:15,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-19 14:56:15,970 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_irda_remove [2021-11-19 14:56:15,970 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_irda_remove [2021-11-19 14:56:15,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 14:56:15,971 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 14:56:15,971 INFO L130 BoogieDeclarations]: Found specification of procedure pci_choose_state [2021-11-19 14:56:15,971 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_choose_state [2021-11-19 14:56:15,971 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_clear_regs [2021-11-19 14:56:15,971 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_clear_regs [2021-11-19 14:56:15,971 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-19 14:56:15,971 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-19 14:56:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-19 14:56:15,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-19 14:56:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_dma_mask [2021-11-19 14:56:15,972 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_dma_mask [2021-11-19 14:56:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 14:56:15,972 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 14:56:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_start_hw [2021-11-19 14:56:15,972 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_start_hw [2021-11-19 14:56:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-19 14:56:15,973 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-19 14:56:15,973 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-19 14:56:15,973 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-19 14:56:15,973 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2021-11-19 14:56:15,973 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2021-11-19 14:56:15,973 INFO L130 BoogieDeclarations]: Found specification of procedure rd_activate [2021-11-19 14:56:15,973 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_activate [2021-11-19 14:56:15,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 14:56:15,974 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2021-11-19 14:56:15,974 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2021-11-19 14:56:15,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 14:56:15,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 14:56:15,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 14:56:15,974 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 14:56:15,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 14:56:15,974 INFO L130 BoogieDeclarations]: Found specification of procedure rd_is_active [2021-11-19 14:56:15,974 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_is_active [2021-11-19 14:56:15,975 INFO L130 BoogieDeclarations]: Found specification of procedure irlap_close [2021-11-19 14:56:15,975 INFO L138 BoogieDeclarations]: Found implementation of procedure irlap_close [2021-11-19 14:56:15,975 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-19 14:56:15,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-19 14:56:15,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:56:15,975 INFO L130 BoogieDeclarations]: Found specification of procedure rd_set_count [2021-11-19 14:56:15,975 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_set_count [2021-11-19 14:56:15,975 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-19 14:56:15,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-19 14:56:15,976 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-19 14:56:15,976 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-19 14:56:15,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:56:15,976 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-19 14:56:15,976 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-19 14:56:15,976 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-19 14:56:15,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-19 14:56:15,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:56:15,977 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-19 14:56:15,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 14:56:15,977 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_process_tx [2021-11-19 14:56:15,977 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_process_tx [2021-11-19 14:56:15,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 14:56:15,977 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-19 14:56:15,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-19 14:56:15,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 14:56:15,978 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_ioctl [2021-11-19 14:56:15,978 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_ioctl [2021-11-19 14:56:15,978 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_resume_early_2 [2021-11-19 14:56:15,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_resume_early_2 [2021-11-19 14:56:15,978 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_alloc_ring [2021-11-19 14:56:15,978 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_alloc_ring [2021-11-19 14:56:15,978 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_fill_rx [2021-11-19 14:56:15,978 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_fill_rx [2021-11-19 14:56:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-19 14:56:15,979 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-19 14:56:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_process_rx [2021-11-19 14:56:15,979 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_process_rx [2021-11-19 14:56:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-19 14:56:15,979 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-19 14:56:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_reg_debug [2021-11-19 14:56:15,979 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_reg_debug [2021-11-19 14:56:15,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 14:56:15,980 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_set_baud [2021-11-19 14:56:15,980 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_set_baud [2021-11-19 14:56:15,980 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2021-11-19 14:56:15,980 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2021-11-19 14:56:15,980 INFO L130 BoogieDeclarations]: Found specification of procedure ring_first [2021-11-19 14:56:15,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ring_first [2021-11-19 14:56:15,981 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_device [2021-11-19 14:56:15,981 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_device [2021-11-19 14:56:15,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:56:15,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:56:16,811 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:56:16,819 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:56:18,611 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 14:56:46,259 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:56:46,278 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:56:46,278 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:56:46,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:56:46 BoogieIcfgContainer [2021-11-19 14:56:46,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:56:46,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:56:46,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:56:46,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:56:46,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:56:11" (1/3) ... [2021-11-19 14:56:46,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243ae9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:56:46, skipping insertion in model container [2021-11-19 14:56:46,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:15" (2/3) ... [2021-11-19 14:56:46,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243ae9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:56:46, skipping insertion in model container [2021-11-19 14:56:46,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:56:46" (3/3) ... [2021-11-19 14:56:46,292 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i [2021-11-19 14:56:46,298 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:56:46,298 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:56:46,367 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:56:46,372 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:56:46,373 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:56:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 1625 states, 1124 states have (on average 1.3220640569395017) internal successors, (1486), 1150 states have internal predecessors, (1486), 409 states have call successors, (409), 91 states have call predecessors, (409), 90 states have return successors, (402), 401 states have call predecessors, (402), 402 states have call successors, (402) [2021-11-19 14:56:46,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-19 14:56:46,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:56:46,461 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:56:46,462 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:56:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:56:46,468 INFO L85 PathProgramCache]: Analyzing trace with hash -754527677, now seen corresponding path program 1 times [2021-11-19 14:56:46,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:56:46,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686058299] [2021-11-19 14:56:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:56:46,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:56:46,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:56:46,496 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:56:46,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:56:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:56:47,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:56:47,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:56:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-19 14:56:48,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:56:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-19 14:56:49,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:56:49,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686058299] [2021-11-19 14:56:49,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686058299] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:56:49,350 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:56:49,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:56:49,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933466702] [2021-11-19 14:56:49,353 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:56:49,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:56:49,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:56:49,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:56:49,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:56:49,406 INFO L87 Difference]: Start difference. First operand has 1625 states, 1124 states have (on average 1.3220640569395017) internal successors, (1486), 1150 states have internal predecessors, (1486), 409 states have call successors, (409), 91 states have call predecessors, (409), 90 states have return successors, (402), 401 states have call predecessors, (402), 402 states have call successors, (402) Second operand has 2 states, 2 states have (on average 36.5) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:56:49,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:56:49,599 INFO L93 Difference]: Finished difference Result 3245 states and 4630 transitions. [2021-11-19 14:56:49,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:56:49,602 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.5) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 175 [2021-11-19 14:56:49,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:56:49,636 INFO L225 Difference]: With dead ends: 3245 [2021-11-19 14:56:49,637 INFO L226 Difference]: Without dead ends: 1601 [2021-11-19 14:56:49,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:56:49,654 INFO L933 BasicCegarLoop]: 2293 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2293 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:56:49,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2293 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:56:49,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-11-19 14:56:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1601. [2021-11-19 14:56:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1110 states have (on average 1.3117117117117116) internal successors, (1456), 1126 states have internal predecessors, (1456), 401 states have call successors, (401), 90 states have call predecessors, (401), 89 states have return successors, (400), 399 states have call predecessors, (400), 400 states have call successors, (400) [2021-11-19 14:56:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2257 transitions. [2021-11-19 14:56:49,842 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2257 transitions. Word has length 175 [2021-11-19 14:56:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:56:49,844 INFO L470 AbstractCegarLoop]: Abstraction has 1601 states and 2257 transitions. [2021-11-19 14:56:49,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.5) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:56:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2257 transitions. [2021-11-19 14:56:49,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-19 14:56:49,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:56:49,867 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:56:49,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:56:50,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:56:50,085 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:56:50,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:56:50,086 INFO L85 PathProgramCache]: Analyzing trace with hash -890110471, now seen corresponding path program 1 times [2021-11-19 14:56:50,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:56:50,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081807068] [2021-11-19 14:56:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:56:50,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:56:50,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:56:50,095 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:56:50,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:56:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:56:51,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:56:51,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:56:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-11-19 14:56:52,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:56:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-11-19 14:56:53,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:56:53,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081807068] [2021-11-19 14:56:53,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081807068] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:56:53,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:56:53,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-19 14:56:53,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079641439] [2021-11-19 14:56:53,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:56:53,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:56:53,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:56:53,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:56:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:56:53,281 INFO L87 Difference]: Start difference. First operand 1601 states and 2257 transitions. Second operand has 6 states, 5 states have (on average 13.0) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:56:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:56:53,799 INFO L93 Difference]: Finished difference Result 3194 states and 4509 transitions. [2021-11-19 14:56:53,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:56:53,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 175 [2021-11-19 14:56:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:56:53,820 INFO L225 Difference]: With dead ends: 3194 [2021-11-19 14:56:53,820 INFO L226 Difference]: Without dead ends: 1602 [2021-11-19 14:56:53,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:56:53,832 INFO L933 BasicCegarLoop]: 2249 mSDtfsCounter, 6 mSDsluCounter, 8978 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 11227 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:56:53,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 11227 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:56:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-11-19 14:56:53,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1602. [2021-11-19 14:56:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1111 states have (on average 1.3114311431143115) internal successors, (1457), 1127 states have internal predecessors, (1457), 401 states have call successors, (401), 90 states have call predecessors, (401), 89 states have return successors, (400), 399 states have call predecessors, (400), 400 states have call successors, (400) [2021-11-19 14:56:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2258 transitions. [2021-11-19 14:56:53,928 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2258 transitions. Word has length 175 [2021-11-19 14:56:53,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:56:53,936 INFO L470 AbstractCegarLoop]: Abstraction has 1602 states and 2258 transitions. [2021-11-19 14:56:53,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:56:53,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2258 transitions. [2021-11-19 14:56:53,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-19 14:56:53,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:56:53,942 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:56:53,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:56:54,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:56:54,161 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:56:54,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:56:54,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1406706502, now seen corresponding path program 1 times [2021-11-19 14:56:54,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:56:54,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637963834] [2021-11-19 14:56:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:56:54,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:56:54,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:56:54,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:56:54,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:56:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:56:55,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:56:55,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:56:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-19 14:56:56,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:56:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-11-19 14:56:57,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:56:57,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637963834] [2021-11-19 14:56:57,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637963834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:56:57,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1067730722] [2021-11-19 14:56:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:56:57,284 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:56:57,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:56:57,286 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:56:57,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-19 14:56:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:56:58,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:56:58,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:56:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-19 14:56:58,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:56:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-19 14:56:59,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1067730722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:56:59,438 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:56:59,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:56:59,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582248122] [2021-11-19 14:56:59,439 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:56:59,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:56:59,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:56:59,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:56:59,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:56:59,442 INFO L87 Difference]: Start difference. First operand 1602 states and 2258 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:56:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:56:59,965 INFO L93 Difference]: Finished difference Result 4236 states and 5958 transitions. [2021-11-19 14:56:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:56:59,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 180 [2021-11-19 14:56:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:56:59,992 INFO L225 Difference]: With dead ends: 4236 [2021-11-19 14:56:59,992 INFO L226 Difference]: Without dead ends: 2662 [2021-11-19 14:57:00,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 706 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:57:00,006 INFO L933 BasicCegarLoop]: 2523 mSDtfsCounter, 1533 mSDsluCounter, 2153 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 4676 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:00,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1533 Valid, 4676 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:57:00,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-11-19 14:57:00,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 2656. [2021-11-19 14:57:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 1847 states have (on average 1.31510557661072) internal successors, (2429), 1872 states have internal predecessors, (2429), 650 states have call successors, (650), 159 states have call predecessors, (650), 158 states have return successors, (653), 646 states have call predecessors, (653), 649 states have call successors, (653) [2021-11-19 14:57:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 3732 transitions. [2021-11-19 14:57:00,278 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 3732 transitions. Word has length 180 [2021-11-19 14:57:00,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:00,282 INFO L470 AbstractCegarLoop]: Abstraction has 2656 states and 3732 transitions. [2021-11-19 14:57:00,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:57:00,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 3732 transitions. [2021-11-19 14:57:00,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-19 14:57:00,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:00,293 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:00,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:00,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:00,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:00,714 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:00,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:00,715 INFO L85 PathProgramCache]: Analyzing trace with hash 151775173, now seen corresponding path program 1 times [2021-11-19 14:57:00,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:00,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097812988] [2021-11-19 14:57:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:00,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:00,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:00,718 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:00,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:57:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:01,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 1977 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:57:01,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-19 14:57:02,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 14:57:04,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:04,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097812988] [2021-11-19 14:57:04,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097812988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:04,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1730129651] [2021-11-19 14:57:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:04,166 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:57:04,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:57:04,169 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:57:04,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 14:57:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:05,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1977 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:57:05,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-19 14:57:06,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-19 14:57:07,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1730129651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:07,449 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:57:07,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [7, 7] total 14 [2021-11-19 14:57:07,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195162441] [2021-11-19 14:57:07,449 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:07,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:57:07,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:57:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:57:07,451 INFO L87 Difference]: Start difference. First operand 2656 states and 3732 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 3 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2021-11-19 14:57:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:08,023 INFO L93 Difference]: Finished difference Result 7923 states and 11146 transitions. [2021-11-19 14:57:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:57:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 3 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) Word has length 242 [2021-11-19 14:57:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:08,072 INFO L225 Difference]: With dead ends: 7923 [2021-11-19 14:57:08,073 INFO L226 Difference]: Without dead ends: 5300 [2021-11-19 14:57:08,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 967 GetRequests, 952 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:57:08,093 INFO L933 BasicCegarLoop]: 2824 mSDtfsCounter, 2201 mSDsluCounter, 7849 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2205 SdHoareTripleChecker+Valid, 10673 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:08,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2205 Valid, 10673 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:57:08,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5300 states. [2021-11-19 14:57:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5300 to 5285. [2021-11-19 14:57:08,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5285 states, 3680 states have (on average 1.315217391304348) internal successors, (4840), 3730 states have internal predecessors, (4840), 1288 states have call successors, (1288), 317 states have call predecessors, (1288), 316 states have return successors, (1297), 1281 states have call predecessors, (1297), 1287 states have call successors, (1297) [2021-11-19 14:57:08,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5285 states to 5285 states and 7425 transitions. [2021-11-19 14:57:08,389 INFO L78 Accepts]: Start accepts. Automaton has 5285 states and 7425 transitions. Word has length 242 [2021-11-19 14:57:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:08,391 INFO L470 AbstractCegarLoop]: Abstraction has 5285 states and 7425 transitions. [2021-11-19 14:57:08,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 3 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2021-11-19 14:57:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5285 states and 7425 transitions. [2021-11-19 14:57:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-19 14:57:08,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:08,400 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:08,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:08,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:08,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:08,813 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:08,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1915993498, now seen corresponding path program 1 times [2021-11-19 14:57:08,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:08,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519928157] [2021-11-19 14:57:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:08,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:08,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:08,818 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:08,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:57:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:10,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:57:10,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-19 14:57:11,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 14:57:12,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:12,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519928157] [2021-11-19 14:57:12,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519928157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:12,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1795354751] [2021-11-19 14:57:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:12,291 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:57:12,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:57:12,293 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:57:12,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 14:57:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:13,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:57:13,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-19 14:57:14,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-19 14:57:15,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1795354751] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:15,561 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:57:15,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [7, 7] total 14 [2021-11-19 14:57:15,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32811217] [2021-11-19 14:57:15,562 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:15,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:57:15,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:15,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:57:15,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:57:15,564 INFO L87 Difference]: Start difference. First operand 5285 states and 7425 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2021-11-19 14:57:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:16,265 INFO L93 Difference]: Finished difference Result 15830 states and 22256 transitions. [2021-11-19 14:57:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:57:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) Word has length 241 [2021-11-19 14:57:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:16,358 INFO L225 Difference]: With dead ends: 15830 [2021-11-19 14:57:16,359 INFO L226 Difference]: Without dead ends: 10578 [2021-11-19 14:57:16,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 948 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:57:16,393 INFO L933 BasicCegarLoop]: 2825 mSDtfsCounter, 2200 mSDsluCounter, 7851 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2204 SdHoareTripleChecker+Valid, 10676 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:16,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2204 Valid, 10676 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:57:16,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10578 states. [2021-11-19 14:57:16,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10578 to 10551. [2021-11-19 14:57:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10551 states, 7352 states have (on average 1.314608269858542) internal successors, (9665), 7452 states have internal predecessors, (9665), 2564 states have call successors, (2564), 635 states have call predecessors, (2564), 634 states have return successors, (2587), 2551 states have call predecessors, (2587), 2563 states have call successors, (2587) [2021-11-19 14:57:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10551 states to 10551 states and 14816 transitions. [2021-11-19 14:57:16,984 INFO L78 Accepts]: Start accepts. Automaton has 10551 states and 14816 transitions. Word has length 241 [2021-11-19 14:57:16,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:16,985 INFO L470 AbstractCegarLoop]: Abstraction has 10551 states and 14816 transitions. [2021-11-19 14:57:16,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2021-11-19 14:57:16,986 INFO L276 IsEmpty]: Start isEmpty. Operand 10551 states and 14816 transitions. [2021-11-19 14:57:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-19 14:57:16,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:16,993 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:17,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:17,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:17,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:17,415 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:17,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1639223806, now seen corresponding path program 1 times [2021-11-19 14:57:17,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:17,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108145867] [2021-11-19 14:57:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:17,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:17,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:17,420 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:17,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:57:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:18,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1973 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:57:18,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-19 14:57:19,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 14:57:20,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:20,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108145867] [2021-11-19 14:57:20,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108145867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:20,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [226796845] [2021-11-19 14:57:20,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:20,746 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:57:20,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:57:20,747 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:57:20,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 14:57:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:21,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 1973 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:57:21,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-19 14:57:23,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-19 14:57:23,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [226796845] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:23,715 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:57:23,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [7, 7] total 14 [2021-11-19 14:57:23,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542321498] [2021-11-19 14:57:23,715 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:23,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:57:23,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:23,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:57:23,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:57:23,717 INFO L87 Difference]: Start difference. First operand 10551 states and 14816 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 4 states have internal predecessors, (130), 3 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2021-11-19 14:57:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:24,635 INFO L93 Difference]: Finished difference Result 31664 states and 44483 transitions. [2021-11-19 14:57:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:57:24,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 4 states have internal predecessors, (130), 3 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) Word has length 240 [2021-11-19 14:57:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:24,797 INFO L225 Difference]: With dead ends: 31664 [2021-11-19 14:57:24,797 INFO L226 Difference]: Without dead ends: 21146 [2021-11-19 14:57:24,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 944 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:57:24,979 INFO L933 BasicCegarLoop]: 2817 mSDtfsCounter, 2201 mSDsluCounter, 7837 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2205 SdHoareTripleChecker+Valid, 10654 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:24,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2205 Valid, 10654 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:57:25,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21146 states. [2021-11-19 14:57:25,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21146 to 21015. [2021-11-19 14:57:25,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21015 states, 14640 states have (on average 1.3150956284153006) internal successors, (19253), 14864 states have internal predecessors, (19253), 5108 states have call successors, (5108), 1267 states have call predecessors, (5108), 1266 states have return successors, (5163), 5059 states have call predecessors, (5163), 5107 states have call successors, (5163) [2021-11-19 14:57:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21015 states to 21015 states and 29524 transitions. [2021-11-19 14:57:25,938 INFO L78 Accepts]: Start accepts. Automaton has 21015 states and 29524 transitions. Word has length 240 [2021-11-19 14:57:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:25,939 INFO L470 AbstractCegarLoop]: Abstraction has 21015 states and 29524 transitions. [2021-11-19 14:57:25,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 4 states have internal predecessors, (130), 3 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2021-11-19 14:57:25,939 INFO L276 IsEmpty]: Start isEmpty. Operand 21015 states and 29524 transitions. [2021-11-19 14:57:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-19 14:57:25,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:25,953 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:25,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:26,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:26,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:26,369 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:26,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:26,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1885789065, now seen corresponding path program 1 times [2021-11-19 14:57:26,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:26,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058834770] [2021-11-19 14:57:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:26,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:26,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:26,372 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:26,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:57:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:27,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:57:27,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-19 14:57:28,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 14:57:29,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:29,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058834770] [2021-11-19 14:57:29,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058834770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:29,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1104398536] [2021-11-19 14:57:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:29,609 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:57:29,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:57:29,610 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:57:29,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:57:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:30,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:57:30,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-19 14:57:32,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-19 14:57:32,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1104398536] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:32,776 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:57:32,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [7, 7] total 14 [2021-11-19 14:57:32,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77861474] [2021-11-19 14:57:32,777 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:32,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:57:32,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:32,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:57:32,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:57:32,779 INFO L87 Difference]: Start difference. First operand 21015 states and 29524 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 3 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2021-11-19 14:57:34,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:34,293 INFO L93 Difference]: Finished difference Result 62906 states and 88358 transitions. [2021-11-19 14:57:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:57:34,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 3 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) Word has length 243 [2021-11-19 14:57:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:34,515 INFO L225 Difference]: With dead ends: 62906 [2021-11-19 14:57:34,515 INFO L226 Difference]: Without dead ends: 41924 [2021-11-19 14:57:34,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 971 GetRequests, 956 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:57:34,596 INFO L933 BasicCegarLoop]: 2645 mSDtfsCounter, 2202 mSDsluCounter, 7491 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2206 SdHoareTripleChecker+Valid, 10136 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:34,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2206 Valid, 10136 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:57:34,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41924 states. [2021-11-19 14:57:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41924 to 41783. [2021-11-19 14:57:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41783 states, 29127 states have (on average 1.3140041885535758) internal successors, (38273), 29559 states have internal predecessors, (38273), 10123 states have call successors, (10123), 2533 states have call predecessors, (10123), 2532 states have return successors, (10250), 10036 states have call predecessors, (10250), 10122 states have call successors, (10250) [2021-11-19 14:57:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41783 states to 41783 states and 58646 transitions. [2021-11-19 14:57:37,165 INFO L78 Accepts]: Start accepts. Automaton has 41783 states and 58646 transitions. Word has length 243 [2021-11-19 14:57:37,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:37,169 INFO L470 AbstractCegarLoop]: Abstraction has 41783 states and 58646 transitions. [2021-11-19 14:57:37,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 3 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2021-11-19 14:57:37,170 INFO L276 IsEmpty]: Start isEmpty. Operand 41783 states and 58646 transitions. [2021-11-19 14:57:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-19 14:57:37,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:37,183 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:37,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:37,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:37,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:37,604 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:37,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:37,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2065977992, now seen corresponding path program 1 times [2021-11-19 14:57:37,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:37,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678390170] [2021-11-19 14:57:37,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:37,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:37,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:37,609 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:37,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:57:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:38,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 2011 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:57:38,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 14:57:39,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-11-19 14:57:40,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:40,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678390170] [2021-11-19 14:57:40,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678390170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:40,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2066154318] [2021-11-19 14:57:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:40,860 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:57:40,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:57:40,867 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:57:40,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 14:57:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:41,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 2011 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:57:41,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-11-19 14:57:43,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-11-19 14:57:44,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2066154318] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:57:44,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:57:44,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7, 7] total 19 [2021-11-19 14:57:44,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180161909] [2021-11-19 14:57:44,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:44,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:57:44,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:44,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:57:44,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:57:44,684 INFO L87 Difference]: Start difference. First operand 41783 states and 58646 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 14:57:46,891 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:57:48,902 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:58:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:58:02,844 INFO L93 Difference]: Finished difference Result 110505 states and 156155 transitions. [2021-11-19 14:58:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:58:02,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) Word has length 253 [2021-11-19 14:58:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:58:03,165 INFO L225 Difference]: With dead ends: 110505 [2021-11-19 14:58:03,166 INFO L226 Difference]: Without dead ends: 68755 [2021-11-19 14:58:03,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 991 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-11-19 14:58:03,316 INFO L933 BasicCegarLoop]: 4373 mSDtfsCounter, 3455 mSDsluCounter, 17058 mSDsCounter, 0 mSdLazyCounter, 2817 mSolverCounterSat, 445 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3462 SdHoareTripleChecker+Valid, 21431 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 2817 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:58:03,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3462 Valid, 21431 Invalid, 3264 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [445 Valid, 2817 Invalid, 2 Unknown, 0 Unchecked, 14.9s Time] [2021-11-19 14:58:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68755 states. [2021-11-19 14:58:06,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68755 to 62372. [2021-11-19 14:58:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62372 states, 43483 states have (on average 1.3144217280316446) internal successors, (57155), 44115 states have internal predecessors, (57155), 15114 states have call successors, (15114), 3775 states have call predecessors, (15114), 3774 states have return successors, (15297), 14997 states have call predecessors, (15297), 15113 states have call successors, (15297) [2021-11-19 14:58:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62372 states to 62372 states and 87566 transitions. [2021-11-19 14:58:06,715 INFO L78 Accepts]: Start accepts. Automaton has 62372 states and 87566 transitions. Word has length 253 [2021-11-19 14:58:06,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:58:06,716 INFO L470 AbstractCegarLoop]: Abstraction has 62372 states and 87566 transitions. [2021-11-19 14:58:06,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 14:58:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 62372 states and 87566 transitions. [2021-11-19 14:58:06,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-19 14:58:06,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:58:06,729 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:58:06,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:58:06,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:58:07,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:58:07,145 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:58:07,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:58:07,145 INFO L85 PathProgramCache]: Analyzing trace with hash -378550359, now seen corresponding path program 1 times [2021-11-19 14:58:07,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:58:07,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742705829] [2021-11-19 14:58:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:58:07,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:58:07,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:58:07,150 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:58:07,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:58:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:58:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 2013 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:58:08,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:58:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-11-19 14:58:09,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:58:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-11-19 14:58:10,649 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:58:10,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742705829] [2021-11-19 14:58:10,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742705829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:58:10,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1817298666] [2021-11-19 14:58:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:58:10,650 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:58:10,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:58:10,652 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:58:10,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:58:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:58:11,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 2013 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:58:11,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:58:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-19 14:58:13,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:58:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-19 14:58:14,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1817298666] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:58:14,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189359776] [2021-11-19 14:58:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:58:14,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:58:14,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:58:14,708 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:58:14,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 14:58:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:58:15,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 2013 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:58:15,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:58:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-19 14:58:17,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:58:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-19 14:58:18,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189359776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:58:18,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:58:18,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 9, 8, 9] total 20 [2021-11-19 14:58:18,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348553290] [2021-11-19 14:58:18,292 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:58:18,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 14:58:18,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:58:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 14:58:18,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:58:18,294 INFO L87 Difference]: Start difference. First operand 62372 states and 87566 transitions. Second operand has 20 states, 18 states have (on average 10.944444444444445) internal successors, (197), 18 states have internal predecessors, (197), 6 states have call successors, (80), 4 states have call predecessors, (80), 8 states have return successors, (76), 6 states have call predecessors, (76), 5 states have call successors, (76) [2021-11-19 14:58:20,427 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:58:22,442 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:58:24,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:58:56,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:58:56,041 INFO L93 Difference]: Finished difference Result 138475 states and 194911 transitions. [2021-11-19 14:58:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 14:58:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 10.944444444444445) internal successors, (197), 18 states have internal predecessors, (197), 6 states have call successors, (80), 4 states have call predecessors, (80), 8 states have return successors, (76), 6 states have call predecessors, (76), 5 states have call successors, (76) Word has length 254 [2021-11-19 14:58:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:58:56,375 INFO L225 Difference]: With dead ends: 138475 [2021-11-19 14:58:56,375 INFO L226 Difference]: Without dead ends: 76056 [2021-11-19 14:58:56,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1561 GetRequests, 1506 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=383, Invalid=2809, Unknown=0, NotChecked=0, Total=3192 [2021-11-19 14:58:56,814 INFO L933 BasicCegarLoop]: 5541 mSDtfsCounter, 7735 mSDsluCounter, 59906 mSDsCounter, 0 mSdLazyCounter, 6826 mSolverCounterSat, 2045 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7749 SdHoareTripleChecker+Valid, 65447 SdHoareTripleChecker+Invalid, 8874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2045 IncrementalHoareTripleChecker+Valid, 6826 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:58:56,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7749 Valid, 65447 Invalid, 8874 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2045 Valid, 6826 Invalid, 3 Unknown, 0 Unchecked, 31.6s Time] [2021-11-19 14:58:56,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76056 states. [2021-11-19 14:58:59,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76056 to 72615. [2021-11-19 14:58:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72615 states, 50635 states have (on average 1.313972548632369) internal successors, (66533), 51375 states have internal predecessors, (66533), 17578 states have call successors, (17578), 4402 states have call predecessors, (17578), 4401 states have return successors, (17793), 17435 states have call predecessors, (17793), 17577 states have call successors, (17793) [2021-11-19 14:59:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72615 states to 72615 states and 101904 transitions. [2021-11-19 14:59:00,035 INFO L78 Accepts]: Start accepts. Automaton has 72615 states and 101904 transitions. Word has length 254 [2021-11-19 14:59:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:00,035 INFO L470 AbstractCegarLoop]: Abstraction has 72615 states and 101904 transitions. [2021-11-19 14:59:00,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 10.944444444444445) internal successors, (197), 18 states have internal predecessors, (197), 6 states have call successors, (80), 4 states have call predecessors, (80), 8 states have return successors, (76), 6 states have call predecessors, (76), 5 states have call successors, (76) [2021-11-19 14:59:00,036 INFO L276 IsEmpty]: Start isEmpty. Operand 72615 states and 101904 transitions. [2021-11-19 14:59:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-19 14:59:00,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:00,051 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:00,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:00,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-19 14:59:00,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 14:59:00,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:59:00,673 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:00,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1249954812, now seen corresponding path program 1 times [2021-11-19 14:59:00,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:59:00,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038435577] [2021-11-19 14:59:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:00,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:59:00,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:59:00,677 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:59:00,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:59:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 2040 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:59:01,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 68 proven. 3 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-19 14:59:03,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-19 14:59:04,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:59:04,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038435577] [2021-11-19 14:59:04,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038435577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:59:04,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [53280314] [2021-11-19 14:59:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:04,516 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:59:04,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:59:04,517 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:59:04,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 14:59:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:05,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 2040 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:59:05,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2021-11-19 14:59:07,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2021-11-19 14:59:08,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [53280314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:59:08,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602338674] [2021-11-19 14:59:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:08,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:08,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:59:08,682 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:59:08,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 14:59:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:09,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 2040 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:59:09,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2021-11-19 14:59:10,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2021-11-19 14:59:11,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602338674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:59:11,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:59:11,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 9, 8, 9] total 22 [2021-11-19 14:59:11,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032630860] [2021-11-19 14:59:11,809 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:59:11,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 14:59:11,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:59:11,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 14:59:11,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:59:11,815 INFO L87 Difference]: Start difference. First operand 72615 states and 101904 transitions. Second operand has 22 states, 20 states have (on average 10.05) internal successors, (201), 20 states have internal predecessors, (201), 6 states have call successors, (80), 4 states have call predecessors, (80), 8 states have return successors, (76), 6 states have call predecessors, (76), 5 states have call successors, (76) [2021-11-19 14:59:14,004 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:59:16,014 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:59:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:44,702 INFO L93 Difference]: Finished difference Result 157485 states and 221248 transitions. [2021-11-19 14:59:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-19 14:59:44,703 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 10.05) internal successors, (201), 20 states have internal predecessors, (201), 6 states have call successors, (80), 4 states have call predecessors, (80), 8 states have return successors, (76), 6 states have call predecessors, (76), 5 states have call successors, (76) Word has length 260 [2021-11-19 14:59:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:45,046 INFO L225 Difference]: With dead ends: 157485 [2021-11-19 14:59:45,046 INFO L226 Difference]: Without dead ends: 84812 [2021-11-19 14:59:45,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1600 GetRequests, 1540 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=420, Invalid=3362, Unknown=0, NotChecked=0, Total=3782 [2021-11-19 14:59:45,254 INFO L933 BasicCegarLoop]: 5249 mSDtfsCounter, 7726 mSDsluCounter, 72374 mSDsCounter, 0 mSdLazyCounter, 6261 mSolverCounterSat, 2043 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7740 SdHoareTripleChecker+Valid, 77623 SdHoareTripleChecker+Invalid, 8306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2043 IncrementalHoareTripleChecker+Valid, 6261 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:45,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7740 Valid, 77623 Invalid, 8306 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2043 Valid, 6261 Invalid, 2 Unknown, 0 Unchecked, 26.4s Time] [2021-11-19 14:59:45,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84812 states. [2021-11-19 14:59:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84812 to 82849. [2021-11-19 14:59:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82849 states, 57784 states have (on average 1.3136508376021043) internal successors, (75908), 58630 states have internal predecessors, (75908), 20039 states have call successors, (20039), 5026 states have call predecessors, (20039), 5025 states have return successors, (20286), 19872 states have call predecessors, (20286), 20038 states have call successors, (20286) [2021-11-19 14:59:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82849 states to 82849 states and 116233 transitions. [2021-11-19 14:59:48,756 INFO L78 Accepts]: Start accepts. Automaton has 82849 states and 116233 transitions. Word has length 260 [2021-11-19 14:59:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:48,757 INFO L470 AbstractCegarLoop]: Abstraction has 82849 states and 116233 transitions. [2021-11-19 14:59:48,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 10.05) internal successors, (201), 20 states have internal predecessors, (201), 6 states have call successors, (80), 4 states have call predecessors, (80), 8 states have return successors, (76), 6 states have call predecessors, (76), 5 states have call successors, (76) [2021-11-19 14:59:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 82849 states and 116233 transitions. [2021-11-19 14:59:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-19 14:59:49,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:49,012 INFO L514 BasicCegarLoop]: trace histogram [15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:49,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:49,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:49,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:49,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:59:49,625 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:49,626 INFO L85 PathProgramCache]: Analyzing trace with hash 729681488, now seen corresponding path program 1 times [2021-11-19 14:59:49,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:59:49,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366620828] [2021-11-19 14:59:49,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:49,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:59:49,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:59:49,629 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:59:49,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:59:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:50,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:59:50,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 96 proven. 6 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-11-19 14:59:51,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-11-19 14:59:53,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:59:53,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366620828] [2021-11-19 14:59:53,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366620828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:59:53,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2074515609] [2021-11-19 14:59:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:53,427 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:59:53,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:59:53,428 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:59:53,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 14:59:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:54,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:59:54,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-11-19 14:59:56,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-11-19 14:59:57,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2074515609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:59:57,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450393329] [2021-11-19 14:59:57,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:57,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:57,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:59:57,797 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:59:57,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 14:59:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:58,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:59:58,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-11-19 15:00:00,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-11-19 15:00:00,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450393329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:00:00,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:00:00,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 9, 8, 9] total 24 [2021-11-19 15:00:00,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499960036] [2021-11-19 15:00:00,993 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:00:00,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 15:00:00,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:00:00,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 15:00:00,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-11-19 15:00:00,996 INFO L87 Difference]: Start difference. First operand 82849 states and 116233 transitions. Second operand has 24 states, 22 states have (on average 9.318181818181818) internal successors, (205), 22 states have internal predecessors, (205), 6 states have call successors, (80), 4 states have call predecessors, (80), 8 states have return successors, (76), 6 states have call predecessors, (76), 5 states have call successors, (76) [2021-11-19 15:00:03,129 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:00:05,141 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:00:07,152 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:00:09,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:00:48,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:48,181 INFO L93 Difference]: Finished difference Result 177223 states and 248750 transitions. [2021-11-19 15:00:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-19 15:00:48,181 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 9.318181818181818) internal successors, (205), 22 states have internal predecessors, (205), 6 states have call successors, (80), 4 states have call predecessors, (80), 8 states have return successors, (76), 6 states have call predecessors, (76), 5 states have call successors, (76) Word has length 266 [2021-11-19 15:00:48,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:48,510 INFO L225 Difference]: With dead ends: 177223 [2021-11-19 15:00:48,510 INFO L226 Difference]: Without dead ends: 94308 [2021-11-19 15:00:48,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1639 GetRequests, 1574 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=461, Invalid=3961, Unknown=0, NotChecked=0, Total=4422 [2021-11-19 15:00:48,723 INFO L933 BasicCegarLoop]: 5249 mSDtfsCounter, 7629 mSDsluCounter, 71252 mSDsCounter, 0 mSdLazyCounter, 8936 mSolverCounterSat, 1987 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7643 SdHoareTripleChecker+Valid, 76501 SdHoareTripleChecker+Invalid, 10927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1987 IncrementalHoareTripleChecker+Valid, 8936 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:48,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7643 Valid, 76501 Invalid, 10927 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1987 Valid, 8936 Invalid, 4 Unknown, 0 Unchecked, 39.3s Time] [2021-11-19 15:00:48,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94308 states. [2021-11-19 15:00:52,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94308 to 93091. [2021-11-19 15:00:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93091 states, 64941 states have (on average 1.3133613587718083) internal successors, (85291), 65893 states have internal predecessors, (85291), 22500 states have call successors, (22500), 5650 states have call predecessors, (22500), 5649 states have return successors, (22779), 22309 states have call predecessors, (22779), 22499 states have call successors, (22779) [2021-11-19 15:00:53,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93091 states to 93091 states and 130570 transitions. [2021-11-19 15:00:53,228 INFO L78 Accepts]: Start accepts. Automaton has 93091 states and 130570 transitions. Word has length 266 [2021-11-19 15:00:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:53,228 INFO L470 AbstractCegarLoop]: Abstraction has 93091 states and 130570 transitions. [2021-11-19 15:00:53,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 9.318181818181818) internal successors, (205), 22 states have internal predecessors, (205), 6 states have call successors, (80), 4 states have call predecessors, (80), 8 states have return successors, (76), 6 states have call predecessors, (76), 5 states have call successors, (76) [2021-11-19 15:00:53,229 INFO L276 IsEmpty]: Start isEmpty. Operand 93091 states and 130570 transitions. [2021-11-19 15:00:53,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-19 15:00:53,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:53,248 INFO L514 BasicCegarLoop]: trace histogram [20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:00:53,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:53,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:53,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-19 15:00:53,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:53,873 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:53,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash 989179374, now seen corresponding path program 1 times [2021-11-19 15:00:53,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:00:53,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183329559] [2021-11-19 15:00:53,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:53,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:00:53,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:00:53,876 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:00:53,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 15:00:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:55,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:00:55,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 132 proven. 10 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-19 15:00:56,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2021-11-19 15:00:58,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:00:58,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183329559] [2021-11-19 15:00:58,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183329559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:00:58,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [47225367] [2021-11-19 15:00:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:58,363 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:00:58,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:00:58,364 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:00:58,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-19 15:00:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:59,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:00:59,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-19 15:01:02,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2021-11-19 15:01:04,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [47225367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:04,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010826052] [2021-11-19 15:01:04,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:04,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:01:04,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:01:04,319 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:01:04,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 15:01:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:05,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:01:05,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-19 15:01:07,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2021-11-19 15:01:08,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010826052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:08,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:01:08,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 12, 11, 12] total 31 [2021-11-19 15:01:08,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366517869] [2021-11-19 15:01:08,279 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:01:08,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 15:01:08,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:08,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 15:01:08,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-11-19 15:01:08,281 INFO L87 Difference]: Start difference. First operand 93091 states and 130570 transitions. Second operand has 31 states, 29 states have (on average 7.344827586206897) internal successors, (213), 28 states have internal predecessors, (213), 6 states have call successors, (83), 5 states have call predecessors, (83), 10 states have return successors, (80), 7 states have call predecessors, (80), 6 states have call successors, (80) [2021-11-19 15:01:10,426 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:01:12,442 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:01:14,466 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:01:16,475 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:02:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:52,426 INFO L93 Difference]: Finished difference Result 298955 states and 428705 transitions. [2021-11-19 15:02:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-19 15:02:52,427 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 7.344827586206897) internal successors, (213), 28 states have internal predecessors, (213), 6 states have call successors, (83), 5 states have call predecessors, (83), 10 states have return successors, (80), 7 states have call predecessors, (80), 6 states have call successors, (80) Word has length 282 [2021-11-19 15:02:52,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:53,671 INFO L225 Difference]: With dead ends: 298955 [2021-11-19 15:02:53,671 INFO L226 Difference]: Without dead ends: 205755 [2021-11-19 15:02:53,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1751 GetRequests, 1662 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=781, Invalid=7409, Unknown=0, NotChecked=0, Total=8190 [2021-11-19 15:02:53,957 INFO L933 BasicCegarLoop]: 6020 mSDtfsCounter, 13686 mSDsluCounter, 99847 mSDsCounter, 0 mSdLazyCounter, 21341 mSolverCounterSat, 4849 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13700 SdHoareTripleChecker+Valid, 105867 SdHoareTripleChecker+Invalid, 26194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 4849 IncrementalHoareTripleChecker+Valid, 21341 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:53,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13700 Valid, 105867 Invalid, 26194 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [4849 Valid, 21341 Invalid, 4 Unknown, 0 Unchecked, 87.5s Time] [2021-11-19 15:02:54,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205755 states. [2021-11-19 15:03:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205755 to 144477. [2021-11-19 15:03:01,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144477 states, 100821 states have (on average 1.3123059680026978) internal successors, (132308), 102307 states have internal predecessors, (132308), 34841 states have call successors, (34841), 8791 states have call predecessors, (34841), 8814 states have return successors, (35336), 34550 states have call predecessors, (35336), 34840 states have call successors, (35336) [2021-11-19 15:03:01,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144477 states to 144477 states and 202485 transitions. [2021-11-19 15:03:01,689 INFO L78 Accepts]: Start accepts. Automaton has 144477 states and 202485 transitions. Word has length 282 [2021-11-19 15:03:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:01,689 INFO L470 AbstractCegarLoop]: Abstraction has 144477 states and 202485 transitions. [2021-11-19 15:03:01,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 7.344827586206897) internal successors, (213), 28 states have internal predecessors, (213), 6 states have call successors, (83), 5 states have call predecessors, (83), 10 states have return successors, (80), 7 states have call predecessors, (80), 6 states have call successors, (80) [2021-11-19 15:03:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 144477 states and 202485 transitions. [2021-11-19 15:03:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-11-19 15:03:01,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:01,715 INFO L514 BasicCegarLoop]: trace histogram [22, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:01,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-19 15:03:01,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:02,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-19 15:03:02,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:02,328 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:02,329 INFO L85 PathProgramCache]: Analyzing trace with hash 859546802, now seen corresponding path program 1 times [2021-11-19 15:03:02,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:02,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631982745] [2021-11-19 15:03:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:02,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:02,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:02,332 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:02,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 15:03:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:04,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 2304 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 15:03:04,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 158 proven. 15 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-11-19 15:03:05,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2021-11-19 15:03:08,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:08,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631982745] [2021-11-19 15:03:08,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631982745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:08,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [62455986] [2021-11-19 15:03:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:08,021 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:08,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:03:08,023 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:03:08,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d087fa-7716-494c-bd30-c94de2664594/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-19 15:03:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:09,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 2304 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:03:09,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-11-19 15:03:10,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-11-19 15:03:10,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [62455986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:10,770 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:03:10,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 11] total 20 [2021-11-19 15:03:10,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466162293] [2021-11-19 15:03:10,771 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:10,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:03:10,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:10,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:03:10,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:03:10,772 INFO L87 Difference]: Start difference. First operand 144477 states and 202485 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51)