./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF --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 73338d683e10a9827a18cf31e1247b64129367b1297cba22c91c243b4552d29d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:36:09,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:36:09,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:36:09,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:36:09,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:36:09,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:36:09,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:36:09,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:36:09,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:36:09,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:36:09,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:36:09,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:36:09,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:36:09,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:36:09,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:36:09,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:36:09,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:36:09,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:36:09,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:36:09,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:36:09,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:36:09,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:36:10,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:36:10,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:36:10,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:36:10,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:36:10,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:36:10,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:36:10,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:36:10,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:36:10,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:36:10,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:36:10,023 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:36:10,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:36:10,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:36:10,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:36:10,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:36:10,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:36:10,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:36:10,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:36:10,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:36:10,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:36:10,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:36:10,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:36:10,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:36:10,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:36:10,090 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:36:10,090 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:36:10,091 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:36:10,091 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:36:10,099 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:36:10,099 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:36:10,101 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:36:10,101 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:36:10,101 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:36:10,102 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:36:10,102 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:36:10,102 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:36:10,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:36:10,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:36:10,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:36:10,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:36:10,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:36:10,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:36:10,105 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:36:10,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:36:10,106 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:36:10,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:36:10,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:36:10,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:36:10,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:36:10,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:36:10,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:36:10,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:36:10,110 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:36:10,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:36:10,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:36:10,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:36:10,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:36:10,111 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_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73338d683e10a9827a18cf31e1247b64129367b1297cba22c91c243b4552d29d [2021-11-12 23:36:10,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:36:10,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:36:10,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:36:10,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:36:10,556 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:36:10,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:36:10,646 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/data/b214a7521/2c54cb3f20ad4501bfa6572c5f2c67ba/FLAG3e3a892b7 [2021-11-12 23:36:11,772 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:36:11,774 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:36:11,841 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/data/b214a7521/2c54cb3f20ad4501bfa6572c5f2c67ba/FLAG3e3a892b7 [2021-11-12 23:36:12,154 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/data/b214a7521/2c54cb3f20ad4501bfa6572c5f2c67ba [2021-11-12 23:36:12,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:36:12,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:36:12,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:36:12,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:36:12,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:36:12,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:36:12" (1/1) ... [2021-11-12 23:36:12,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d4dba30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:12, skipping insertion in model container [2021-11-12 23:36:12,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:36:12" (1/1) ... [2021-11-12 23:36:12,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:36:12,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:36:13,908 WARN L228 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_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[116401,116414] [2021-11-12 23:36:14,008 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:14,015 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:14,023 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:14,157 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:14,180 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:14,199 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:14,217 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:36:14,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:36:14,786 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) [2021-11-12 23:36:14,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5ec76a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:14, skipping insertion in model container [2021-11-12 23:36:14,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:36:14,787 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:36:14,790 INFO L158 Benchmark]: Toolchain (without parser) took 2629.14ms. Allocated memory was 107.0MB in the beginning and 144.7MB in the end (delta: 37.7MB). Free memory was 78.3MB in the beginning and 74.4MB in the end (delta: 3.9MB). Peak memory consumption was 44.9MB. Max. memory is 16.1GB. [2021-11-12 23:36:14,791 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 107.0MB. Free memory is still 83.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:36:14,793 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2625.62ms. Allocated memory was 107.0MB in the beginning and 144.7MB in the end (delta: 37.7MB). Free memory was 78.3MB in the beginning and 74.4MB in the end (delta: 3.9MB). Peak memory consumption was 44.9MB. Max. memory is 16.1GB. [2021-11-12 23:36:14,795 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 107.0MB. Free memory is still 83.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2625.62ms. Allocated memory was 107.0MB in the beginning and 144.7MB in the end (delta: 37.7MB). Free memory was 78.3MB in the beginning and 74.4MB in the end (delta: 3.9MB). Peak memory consumption was 44.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4117]: 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_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF --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 73338d683e10a9827a18cf31e1247b64129367b1297cba22c91c243b4552d29d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:36:17,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:36:17,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:36:17,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:36:17,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:36:17,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:36:17,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:36:17,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:36:17,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:36:17,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:36:17,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:36:17,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:36:17,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:36:17,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:36:17,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:36:17,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:36:17,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:36:17,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:36:17,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:36:17,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:36:17,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:36:17,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:36:17,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:36:17,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:36:17,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:36:17,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:36:17,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:36:17,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:36:17,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:36:17,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:36:17,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:36:17,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:36:17,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:36:17,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:36:17,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:36:17,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:36:17,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:36:17,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:36:17,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:36:17,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:36:17,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:36:17,801 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:36:17,836 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:36:17,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:36:17,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:36:17,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:36:17,838 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:36:17,838 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:36:17,838 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:36:17,839 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:36:17,839 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:36:17,839 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:36:17,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:36:17,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:36:17,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:36:17,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:36:17,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:36:17,841 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:36:17,842 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:36:17,842 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:36:17,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:36:17,842 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:36:17,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:36:17,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:36:17,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:36:17,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:36:17,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:36:17,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:36:17,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:36:17,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:36:17,845 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:36:17,845 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:36:17,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:36:17,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:36:17,846 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:36:17,846 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_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73338d683e10a9827a18cf31e1247b64129367b1297cba22c91c243b4552d29d [2021-11-12 23:36:18,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:36:18,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:36:18,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:36:18,426 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:36:18,427 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:36:18,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:36:18,534 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/data/07d09791f/766d91acdf744123955c3e7f6e060423/FLAG873954a29 [2021-11-12 23:36:19,694 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:36:19,696 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:36:19,759 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/data/07d09791f/766d91acdf744123955c3e7f6e060423/FLAG873954a29 [2021-11-12 23:36:20,055 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/data/07d09791f/766d91acdf744123955c3e7f6e060423 [2021-11-12 23:36:20,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:36:20,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:36:20,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:36:20,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:36:20,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:36:20,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:36:20" (1/1) ... [2021-11-12 23:36:20,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cd65fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:20, skipping insertion in model container [2021-11-12 23:36:20,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:36:20" (1/1) ... [2021-11-12 23:36:20,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:36:20,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:36:21,758 WARN L228 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_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[116401,116414] [2021-11-12 23:36:22,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:36:22,685 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:36:22,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:36:22,958 WARN L228 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_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[116401,116414] [2021-11-12 23:36:23,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:36:23,343 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:36:23,524 WARN L228 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_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[116401,116414] [2021-11-12 23:36:23,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:36:24,051 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:36:24,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:24 WrapperNode [2021-11-12 23:36:24,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:36:24,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:36:24,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:36:24,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:36:24,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:24" (1/1) ... [2021-11-12 23:36:24,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:24" (1/1) ... [2021-11-12 23:36:24,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:36:24,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:36:24,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:36:24,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:36:24,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:24" (1/1) ... [2021-11-12 23:36:24,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:24" (1/1) ... [2021-11-12 23:36:24,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:24" (1/1) ... [2021-11-12 23:36:24,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:24" (1/1) ... [2021-11-12 23:36:24,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:24" (1/1) ... [2021-11-12 23:36:25,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:24" (1/1) ... [2021-11-12 23:36:25,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:24" (1/1) ... [2021-11-12 23:36:25,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:36:25,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:36:25,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:36:25,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:36:25,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:24" (1/1) ... [2021-11-12 23:36:25,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:36:25,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:36:25,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:36:25,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:36:25,226 INFO L130 BoogieDeclarations]: Found specification of procedure acm_disconnect [2021-11-12 23:36:25,227 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_disconnect [2021-11-12 23:36:25,227 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_hangup [2021-11-12 23:36:25,227 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_hangup [2021-11-12 23:36:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:36:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:36:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:36:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_18 [2021-11-12 23:36:25,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_18 [2021-11-12 23:36:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:36:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 23:36:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:36:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:36:25,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:36:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_destruct [2021-11-12 23:36:25,230 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_destruct [2021-11-12 23:36:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-12 23:36:25,231 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-12 23:36:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-12 23:36:25,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-12 23:36:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_22 [2021-11-12 23:36:25,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_22 [2021-11-12 23:36:25,232 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_cleanup [2021-11-12 23:36:25,232 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_cleanup [2021-11-12 23:36:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:36:25,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:36:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-12 23:36:25,234 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-12 23:36:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-11-12 23:36:25,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-11-12 23:36:25,235 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_buffers_free [2021-11-12 23:36:25,235 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_buffers_free [2021-11-12 23:36:25,236 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-12 23:36:25,236 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-12 23:36:25,236 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 23:36:25,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 23:36:25,237 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-12 23:36:25,237 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-12 23:36:25,238 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2021-11-12 23:36:25,238 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2021-11-12 23:36:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:36:25,239 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:36:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:36:25,239 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:36:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-11-12 23:36:25,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-11-12 23:36:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-12 23:36:25,240 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-12 23:36:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_put [2021-11-12 23:36:25,241 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_put [2021-11-12 23:36:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_chars_in_buffer [2021-11-12 23:36:25,242 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_chars_in_buffer [2021-11-12 23:36:25,243 INFO L130 BoogieDeclarations]: Found specification of procedure acm_resume [2021-11-12 23:36:25,244 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_resume [2021-11-12 23:36:25,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:36:25,244 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 23:36:25,244 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_msg [2021-11-12 23:36:25,245 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_msg [2021-11-12 23:36:25,245 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-12 23:36:25,246 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-12 23:36:25,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:36:25,247 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_hangup [2021-11-12 23:36:25,247 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_hangup [2021-11-12 23:36:25,248 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ifnum_to_if [2021-11-12 23:36:25,248 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ifnum_to_if [2021-11-12 23:36:25,248 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-12 23:36:25,248 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-12 23:36:25,249 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-12 23:36:25,249 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_interface [2021-11-12 23:36:25,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_interface [2021-11-12 23:36:25,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:36:25,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:36:25,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:36:25,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:36:25,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:36:25,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:36:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-12 23:36:25,251 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-12 23:36:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 23:36:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:36:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:36:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:36:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-12 23:36:25,253 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-12 23:36:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-12 23:36:25,254 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-12 23:36:25,254 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-12 23:36:25,254 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-12 23:36:25,254 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-12 23:36:25,255 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-12 23:36:25,255 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmget [2021-11-12 23:36:25,256 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmget [2021-11-12 23:36:25,256 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_shutdown [2021-11-12 23:36:25,257 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_shutdown [2021-11-12 23:36:25,257 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_interface [2021-11-12 23:36:25,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_interface [2021-11-12 23:36:25,259 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_set_termios [2021-11-12 23:36:25,259 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_set_termios [2021-11-12 23:36:25,259 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-12 23:36:25,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-12 23:36:25,260 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-12 23:36:25,260 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-12 23:36:25,260 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_break_ctl [2021-11-12 23:36:25,260 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_break_ctl [2021-11-12 23:36:25,260 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-12 23:36:25,261 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-12 23:36:25,261 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_7 [2021-11-12 23:36:25,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_7 [2021-11-12 23:36:25,262 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_6 [2021-11-12 23:36:25,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_6 [2021-11-12 23:36:25,262 INFO L130 BoogieDeclarations]: Found specification of procedure usb_mark_last_busy [2021-11-12 23:36:25,262 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_mark_last_busy [2021-11-12 23:36:25,263 INFO L130 BoogieDeclarations]: Found specification of procedure acm_start_wb [2021-11-12 23:36:25,264 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_start_wb [2021-11-12 23:36:25,268 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-12 23:36:25,268 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-12 23:36:25,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:36:25,269 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:36:25,270 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-12 23:36:25,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-12 23:36:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_throttle [2021-11-12 23:36:25,273 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_throttle [2021-11-12 23:36:25,273 INFO L130 BoogieDeclarations]: Found specification of procedure acm_wb_is_avail [2021-11-12 23:36:25,278 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_wb_is_avail [2021-11-12 23:36:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-12 23:36:25,279 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-12 23:36:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-12 23:36:25,279 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-12 23:36:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_write_room [2021-11-12 23:36:25,280 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_write_room [2021-11-12 23:36:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urb [2021-11-12 23:36:25,280 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urb [2021-11-12 23:36:25,281 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 23:36:25,281 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 23:36:25,281 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_done [2021-11-12 23:36:25,281 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_done [2021-11-12 23:36:25,281 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_ioctl [2021-11-12 23:36:25,282 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_ioctl [2021-11-12 23:36:25,282 INFO L130 BoogieDeclarations]: Found specification of procedure acm_release_minor [2021-11-12 23:36:25,282 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_release_minor [2021-11-12 23:36:25,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:36:25,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 23:36:25,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:36:25,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:36:25,283 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-12 23:36:25,283 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-12 23:36:25,283 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 23:36:25,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 23:36:25,284 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface_async [2021-11-12 23:36:25,284 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface_async [2021-11-12 23:36:25,284 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_unthrottle [2021-11-12 23:36:25,285 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_unthrottle [2021-11-12 23:36:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:36:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_3 [2021-11-12 23:36:25,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_3 [2021-11-12 23:36:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-12 23:36:25,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-12 23:36:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:36:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_int_urb_17 [2021-11-12 23:36:25,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_int_urb_17 [2021-11-12 23:36:25,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:36:25,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 23:36:25,288 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:36:25,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:36:25,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:36:25,289 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-12 23:36:25,289 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-12 23:36:25,289 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-11-12 23:36:25,289 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-11-12 23:36:25,289 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_buffers_free [2021-11-12 23:36:25,290 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_buffers_free [2021-11-12 23:36:25,290 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_irq [2021-11-12 23:36:25,290 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_irq [2021-11-12 23:36:25,290 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urbs [2021-11-12 23:36:25,291 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urbs [2021-11-12 23:36:25,291 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_install [2021-11-12 23:36:25,291 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_install [2021-11-12 23:36:25,291 INFO L130 BoogieDeclarations]: Found specification of procedure stop_data_traffic [2021-11-12 23:36:25,291 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_data_traffic [2021-11-12 23:36:25,292 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-12 23:36:25,292 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-12 23:36:25,292 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-11-12 23:36:25,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-11-12 23:36:25,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:36:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-12 23:36:25,293 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-12 23:36:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-11-12 23:36:25,295 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-11-12 23:36:25,295 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmset [2021-11-12 23:36:25,296 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmset [2021-11-12 23:36:25,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:36:25,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:36:25,296 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-11-12 23:36:25,297 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-11-12 23:36:25,297 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_bulk_callback [2021-11-12 23:36:25,297 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_bulk_callback [2021-11-12 23:36:25,297 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-12 23:36:25,297 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-12 23:36:27,810 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:36:37,045 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-11-12 23:37:26,758 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:37:26,759 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:37:26,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:37:26 BoogieIcfgContainer [2021-11-12 23:37:26,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:37:26,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:37:26,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:37:26,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:37:26,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:36:20" (1/3) ... [2021-11-12 23:37:26,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a3fc32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:37:26, skipping insertion in model container [2021-11-12 23:37:26,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:24" (2/3) ... [2021-11-12 23:37:26,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a3fc32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:37:26, skipping insertion in model container [2021-11-12 23:37:26,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:37:26" (3/3) ... [2021-11-12 23:37:26,774 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:37:26,781 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:37:26,781 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:37:26,882 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:37:26,891 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 [2021-11-12 23:37:26,892 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:37:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 1491 states, 1062 states have (on average 1.3455743879472692) internal successors, (1429), 1098 states have internal predecessors, (1429), 346 states have call successors, (346), 83 states have call predecessors, (346), 81 states have return successors, (335), 327 states have call predecessors, (335), 335 states have call successors, (335) [2021-11-12 23:37:26,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 23:37:26,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:26,976 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:37:26,977 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:26,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1133064844, now seen corresponding path program 1 times [2021-11-12 23:37:27,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:27,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502804645] [2021-11-12 23:37:27,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:27,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:27,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:27,018 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:27,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:37:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:35,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 4196 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:37:35,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:37:36,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:37:37,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:37,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502804645] [2021-11-12 23:37:37,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502804645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:37:37,595 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:37:37,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:37:37,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887189281] [2021-11-12 23:37:37,598 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:37:37,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:37:37,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:37,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:37:37,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:37:37,656 INFO L87 Difference]: Start difference. First operand has 1491 states, 1062 states have (on average 1.3455743879472692) internal successors, (1429), 1098 states have internal predecessors, (1429), 346 states have call successors, (346), 83 states have call predecessors, (346), 81 states have return successors, (335), 327 states have call predecessors, (335), 335 states have call successors, (335) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 23:37:38,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:37:38,360 INFO L93 Difference]: Finished difference Result 2986 states and 4315 transitions. [2021-11-12 23:37:38,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:37:38,363 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 117 [2021-11-12 23:37:38,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:37:38,395 INFO L225 Difference]: With dead ends: 2986 [2021-11-12 23:37:38,395 INFO L226 Difference]: Without dead ends: 1479 [2021-11-12 23:37:38,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:37:38,415 INFO L933 BasicCegarLoop]: 2099 mSDtfsCounter, 7 mSDsluCounter, 4196 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 238.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 6295 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.96ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 257.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:37:38,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 6295 Invalid, 25 Unknown, 0 Unchecked, 45.96ms Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 257.00ms Time] [2021-11-12 23:37:38,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-11-12 23:37:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1479. [2021-11-12 23:37:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1062 states have (on average 1.3342749529190208) internal successors, (1417), 1085 states have internal predecessors, (1417), 335 states have call successors, (335), 82 states have call predecessors, (335), 81 states have return successors, (329), 321 states have call predecessors, (329), 329 states have call successors, (329) [2021-11-12 23:37:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 2081 transitions. [2021-11-12 23:37:38,637 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 2081 transitions. Word has length 117 [2021-11-12 23:37:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:37:38,640 INFO L470 AbstractCegarLoop]: Abstraction has 1479 states and 2081 transitions. [2021-11-12 23:37:38,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 23:37:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 2081 transitions. [2021-11-12 23:37:38,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 23:37:38,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:38,655 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2021-11-12 23:37:38,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:37:38,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:37:38,872 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:38,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:38,873 INFO L85 PathProgramCache]: Analyzing trace with hash 285442252, now seen corresponding path program 1 times [2021-11-12 23:37:38,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:38,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606535800] [2021-11-12 23:37:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:38,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:38,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:38,896 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:38,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:37:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:47,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 4206 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:37:47,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:37:48,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:37:50,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:50,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606535800] [2021-11-12 23:37:50,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606535800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:37:50,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2086548974] [2021-11-12 23:37:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:50,570 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:37:50,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:37:50,575 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:37:50,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-12 23:37:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:53,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 4206 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:37:53,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:37:54,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:37:55,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2086548974] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:37:55,239 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:37:55,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-12 23:37:55,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979765671] [2021-11-12 23:37:55,240 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:37:55,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:37:55,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:55,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:37:55,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:37:55,242 INFO L87 Difference]: Start difference. First operand 1479 states and 2081 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:37:57,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.66s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:06,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:06,551 INFO L93 Difference]: Finished difference Result 5692 states and 8013 transitions. [2021-11-12 23:38:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:06,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 119 [2021-11-12 23:38:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:06,596 INFO L225 Difference]: With dead ends: 5692 [2021-11-12 23:38:06,596 INFO L226 Difference]: Without dead ends: 4252 [2021-11-12 23:38:06,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:06,611 INFO L933 BasicCegarLoop]: 2699 mSDtfsCounter, 3979 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10477.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3979 SdHoareTripleChecker+Valid, 7910 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.77ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10967.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:06,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3979 Valid, 7910 Invalid, 673 Unknown, 0 Unchecked, 37.77ms Time], IncrementalHoareTripleChecker [8 Valid, 664 Invalid, 1 Unknown, 0 Unchecked, 10967.32ms Time] [2021-11-12 23:38:06,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2021-11-12 23:38:06,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 4246. [2021-11-12 23:38:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4246 states, 3065 states have (on average 1.3386623164763458) internal successors, (4103), 3124 states have internal predecessors, (4103), 941 states have call successors, (941), 240 states have call predecessors, (941), 239 states have return successors, (935), 911 states have call predecessors, (935), 935 states have call successors, (935) [2021-11-12 23:38:06,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4246 states to 4246 states and 5979 transitions. [2021-11-12 23:38:06,917 INFO L78 Accepts]: Start accepts. Automaton has 4246 states and 5979 transitions. Word has length 119 [2021-11-12 23:38:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:06,923 INFO L470 AbstractCegarLoop]: Abstraction has 4246 states and 5979 transitions. [2021-11-12 23:38:06,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:38:06,924 INFO L276 IsEmpty]: Start isEmpty. Operand 4246 states and 5979 transitions. [2021-11-12 23:38:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:38:06,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:06,938 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2021-11-12 23:38:06,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:07,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:07,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:07,360 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1173241140, now seen corresponding path program 1 times [2021-11-12 23:38:07,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:07,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649908014] [2021-11-12 23:38:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:07,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:07,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:07,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:07,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:38:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:14,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 4238 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:38:14,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:38:15,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:38:16,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:16,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649908014] [2021-11-12 23:38:16,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649908014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:16,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1652573257] [2021-11-12 23:38:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:16,885 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:16,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:16,891 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:16,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-12 23:38:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:19,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 4238 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:38:19,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:38:24,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:38:26,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1652573257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:26,356 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:26,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [6, 6] total 12 [2021-11-12 23:38:26,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036816394] [2021-11-12 23:38:26,356 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:26,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:38:26,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:26,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:38:26,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:26,358 INFO L87 Difference]: Start difference. First operand 4246 states and 5979 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-12 23:38:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:27,154 INFO L93 Difference]: Finished difference Result 12643 states and 18082 transitions. [2021-11-12 23:38:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:27,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 131 [2021-11-12 23:38:27,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:27,227 INFO L225 Difference]: With dead ends: 12643 [2021-11-12 23:38:27,227 INFO L226 Difference]: Without dead ends: 8445 [2021-11-12 23:38:27,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:27,252 INFO L933 BasicCegarLoop]: 2538 mSDtfsCounter, 2040 mSDsluCounter, 4018 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 465.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 6556 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.78ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 499.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:27,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2040 Valid, 6556 Invalid, 56 Unknown, 0 Unchecked, 14.78ms Time], IncrementalHoareTripleChecker [22 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 499.68ms Time] [2021-11-12 23:38:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8445 states. [2021-11-12 23:38:27,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8445 to 8432. [2021-11-12 23:38:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 6097 states have (on average 1.3388551746760702) internal successors, (8163), 6210 states have internal predecessors, (8163), 1858 states have call successors, (1858), 477 states have call predecessors, (1858), 476 states have return successors, (1957), 1804 states have call predecessors, (1957), 1852 states have call successors, (1957) [2021-11-12 23:38:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 11978 transitions. [2021-11-12 23:38:27,728 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 11978 transitions. Word has length 131 [2021-11-12 23:38:27,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:27,729 INFO L470 AbstractCegarLoop]: Abstraction has 8432 states and 11978 transitions. [2021-11-12 23:38:27,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-12 23:38:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 11978 transitions. [2021-11-12 23:38:27,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 23:38:27,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:27,735 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2021-11-12 23:38:27,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:27,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-12 23:38:28,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:28,160 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:28,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:28,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2010034213, now seen corresponding path program 1 times [2021-11-12 23:38:28,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:28,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516036085] [2021-11-12 23:38:28,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:28,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:28,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:28,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:28,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:38:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:35,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 4239 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:38:35,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:38:36,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:38:37,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:37,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516036085] [2021-11-12 23:38:37,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516036085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:37,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [103280995] [2021-11-12 23:38:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:37,456 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:37,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:37,465 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:37,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 23:38:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 4239 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:38:40,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:38:45,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:38:46,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [103280995] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:46,885 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:46,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [6, 6] total 12 [2021-11-12 23:38:46,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326161128] [2021-11-12 23:38:46,886 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:46,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:38:46,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:46,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:38:46,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:46,888 INFO L87 Difference]: Start difference. First operand 8432 states and 11978 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-12 23:38:48,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:48,496 INFO L93 Difference]: Finished difference Result 8434 states and 11979 transitions. [2021-11-12 23:38:48,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:48,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 132 [2021-11-12 23:38:48,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:48,562 INFO L225 Difference]: With dead ends: 8434 [2021-11-12 23:38:48,563 INFO L226 Difference]: Without dead ends: 8431 [2021-11-12 23:38:48,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:48,570 INFO L933 BasicCegarLoop]: 2070 mSDtfsCounter, 3352 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1098.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3352 SdHoareTripleChecker+Valid, 2070 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.43ms SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1347.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:48,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3352 Valid, 2070 Invalid, 647 Unknown, 0 Unchecked, 12.43ms Time], IncrementalHoareTripleChecker [646 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 1347.93ms Time] [2021-11-12 23:38:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8431 states. [2021-11-12 23:38:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8431 to 8431. [2021-11-12 23:38:49,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8431 states, 6097 states have (on average 1.338691159586682) internal successors, (8162), 6209 states have internal predecessors, (8162), 1857 states have call successors, (1857), 477 states have call predecessors, (1857), 476 states have return successors, (1957), 1804 states have call predecessors, (1957), 1852 states have call successors, (1957) [2021-11-12 23:38:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 11976 transitions. [2021-11-12 23:38:49,060 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 11976 transitions. Word has length 132 [2021-11-12 23:38:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:49,062 INFO L470 AbstractCegarLoop]: Abstraction has 8431 states and 11976 transitions. [2021-11-12 23:38:49,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-12 23:38:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 11976 transitions. [2021-11-12 23:38:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 23:38:49,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:49,068 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2021-11-12 23:38:49,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:49,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:49,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:49,488 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:49,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:49,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2114146729, now seen corresponding path program 1 times [2021-11-12 23:38:49,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:49,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424793040] [2021-11-12 23:38:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:49,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:49,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:49,499 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:49,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:38:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:56,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 4240 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:38:56,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:38:57,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:38:58,693 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:58,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424793040] [2021-11-12 23:38:58,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424793040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:58,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [890363800] [2021-11-12 23:38:58,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:58,694 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:58,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:58,704 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:58,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 23:39:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:01,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 4240 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:39:01,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:39:03,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:39:05,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [890363800] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:05,126 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:39:05,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:39:05,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28495736] [2021-11-12 23:39:05,126 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:05,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:39:05,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:05,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:39:05,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:39:05,127 INFO L87 Difference]: Start difference. First operand 8431 states and 11976 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-12 23:39:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:05,401 INFO L93 Difference]: Finished difference Result 8433 states and 11977 transitions. [2021-11-12 23:39:05,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:39:05,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 133 [2021-11-12 23:39:05,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:05,472 INFO L225 Difference]: With dead ends: 8433 [2021-11-12 23:39:05,472 INFO L226 Difference]: Without dead ends: 8430 [2021-11-12 23:39:05,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:39:05,480 INFO L933 BasicCegarLoop]: 2068 mSDtfsCounter, 1979 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1979 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.89ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:05,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1979 Valid, 2068 Invalid, 1 Unknown, 0 Unchecked, 4.89ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 16.03ms Time] [2021-11-12 23:39:05,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8430 states. [2021-11-12 23:39:05,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8430 to 8430. [2021-11-12 23:39:05,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8430 states, 6097 states have (on average 1.3385271444972937) internal successors, (8161), 6208 states have internal predecessors, (8161), 1856 states have call successors, (1856), 477 states have call predecessors, (1856), 476 states have return successors, (1957), 1804 states have call predecessors, (1957), 1852 states have call successors, (1957) [2021-11-12 23:39:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8430 states to 8430 states and 11974 transitions. [2021-11-12 23:39:05,938 INFO L78 Accepts]: Start accepts. Automaton has 8430 states and 11974 transitions. Word has length 133 [2021-11-12 23:39:05,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:05,939 INFO L470 AbstractCegarLoop]: Abstraction has 8430 states and 11974 transitions. [2021-11-12 23:39:05,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-12 23:39:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 8430 states and 11974 transitions. [2021-11-12 23:39:05,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 23:39:05,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:05,945 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2021-11-12 23:39:06,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:06,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:06,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:06,368 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:06,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:06,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1114732184, now seen corresponding path program 1 times [2021-11-12 23:39:06,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:06,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979706753] [2021-11-12 23:39:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:06,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:06,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:06,374 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:06,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:39:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:13,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 4241 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:39:13,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:39:14,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:39:15,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:15,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979706753] [2021-11-12 23:39:15,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979706753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:15,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1312941284] [2021-11-12 23:39:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:15,943 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:15,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:39:15,943 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:39:15,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 23:39:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:18,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 4241 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:39:18,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:39:21,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:39:22,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1312941284] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:22,683 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:39:22,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:39:22,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010054295] [2021-11-12 23:39:22,684 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:22,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:39:22,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:22,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:39:22,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:39:22,685 INFO L87 Difference]: Start difference. First operand 8430 states and 11974 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-12 23:39:23,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:23,442 INFO L93 Difference]: Finished difference Result 25089 states and 36082 transitions. [2021-11-12 23:39:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:39:23,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 134 [2021-11-12 23:39:23,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:23,534 INFO L225 Difference]: With dead ends: 25089 [2021-11-12 23:39:23,535 INFO L226 Difference]: Without dead ends: 16707 [2021-11-12 23:39:23,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:39:23,586 INFO L933 BasicCegarLoop]: 2679 mSDtfsCounter, 1949 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1949 SdHoareTripleChecker+Valid, 4718 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.60ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:23,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1949 Valid, 4718 Invalid, 10 Unknown, 0 Unchecked, 12.60ms Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 92.47ms Time] [2021-11-12 23:39:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16707 states. [2021-11-12 23:39:24,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16707 to 16673. [2021-11-12 23:39:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16673 states, 12083 states have (on average 1.3403128362161716) internal successors, (16195), 12309 states have internal predecessors, (16195), 3645 states have call successors, (3645), 946 states have call predecessors, (3645), 944 states have return successors, (4067), 3537 states have call predecessors, (4067), 3638 states have call successors, (4067) [2021-11-12 23:39:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16673 states to 16673 states and 23907 transitions. [2021-11-12 23:39:24,731 INFO L78 Accepts]: Start accepts. Automaton has 16673 states and 23907 transitions. Word has length 134 [2021-11-12 23:39:24,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:24,731 INFO L470 AbstractCegarLoop]: Abstraction has 16673 states and 23907 transitions. [2021-11-12 23:39:24,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-12 23:39:24,732 INFO L276 IsEmpty]: Start isEmpty. Operand 16673 states and 23907 transitions. [2021-11-12 23:39:24,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 23:39:24,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:24,738 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2021-11-12 23:39:24,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-12 23:39:24,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:25,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:25,155 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash -197647494, now seen corresponding path program 1 times [2021-11-12 23:39:25,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:25,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579420858] [2021-11-12 23:39:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:25,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:25,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:25,162 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:25,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:39:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:32,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 4242 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:39:32,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:39:33,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:39:34,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:34,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579420858] [2021-11-12 23:39:34,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579420858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:34,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [279542295] [2021-11-12 23:39:34,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:34,795 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:34,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:39:34,796 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:39:34,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 23:39:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:37,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 4242 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:39:37,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:39:40,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:39:41,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [279542295] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:41,509 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:39:41,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:39:41,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915351605] [2021-11-12 23:39:41,510 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:41,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:39:41,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:41,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:39:41,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:39:41,512 INFO L87 Difference]: Start difference. First operand 16673 states and 23907 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-12 23:39:42,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:42,018 INFO L93 Difference]: Finished difference Result 16675 states and 23908 transitions. [2021-11-12 23:39:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:39:42,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 135 [2021-11-12 23:39:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:42,090 INFO L225 Difference]: With dead ends: 16675 [2021-11-12 23:39:42,090 INFO L226 Difference]: Without dead ends: 16654 [2021-11-12 23:39:42,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:39:42,100 INFO L933 BasicCegarLoop]: 2067 mSDtfsCounter, 1975 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1975 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:42,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1975 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 4.72ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:39:42,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16654 states. [2021-11-12 23:39:42,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16654 to 16654. [2021-11-12 23:39:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16654 states, 12069 states have (on average 1.3402933134476758) internal successors, (16176), 12294 states have internal predecessors, (16176), 3642 states have call successors, (3642), 944 states have call predecessors, (3642), 942 states have return successors, (4065), 3535 states have call predecessors, (4065), 3636 states have call successors, (4065) [2021-11-12 23:39:43,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16654 states to 16654 states and 23883 transitions. [2021-11-12 23:39:43,031 INFO L78 Accepts]: Start accepts. Automaton has 16654 states and 23883 transitions. Word has length 135 [2021-11-12 23:39:43,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:43,032 INFO L470 AbstractCegarLoop]: Abstraction has 16654 states and 23883 transitions. [2021-11-12 23:39:43,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-12 23:39:43,032 INFO L276 IsEmpty]: Start isEmpty. Operand 16654 states and 23883 transitions. [2021-11-12 23:39:43,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 23:39:43,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:43,042 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2021-11-12 23:39:43,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:43,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:43,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:43,463 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:43,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:43,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1337568515, now seen corresponding path program 1 times [2021-11-12 23:39:43,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:43,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479299953] [2021-11-12 23:39:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:43,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:43,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:43,475 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:43,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:39:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:50,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 4337 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:39:50,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:39:51,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:39:52,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:52,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479299953] [2021-11-12 23:39:52,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479299953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:52,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1640968032] [2021-11-12 23:39:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:52,805 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:52,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:39:52,807 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:39:52,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 23:39:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 4337 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:39:55,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-12 23:39:56,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-12 23:39:56,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1640968032] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:56,835 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:39:56,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:39:56,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438900042] [2021-11-12 23:39:56,836 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:56,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:39:56,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:56,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:39:56,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:39:56,837 INFO L87 Difference]: Start difference. First operand 16654 states and 23883 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 23:39:58,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:58,579 INFO L93 Difference]: Finished difference Result 49232 states and 70500 transitions. [2021-11-12 23:39:58,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:39:58,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 156 [2021-11-12 23:39:58,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:58,722 INFO L225 Difference]: With dead ends: 49232 [2021-11-12 23:39:58,723 INFO L226 Difference]: Without dead ends: 32626 [2021-11-12 23:39:58,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 611 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:39:58,796 INFO L933 BasicCegarLoop]: 2377 mSDtfsCounter, 1959 mSDsluCounter, 2006 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 717.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 4383 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.30ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 791.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:58,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1959 Valid, 4383 Invalid, 14 Unknown, 0 Unchecked, 7.30ms Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 791.87ms Time] [2021-11-12 23:39:58,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32626 states. [2021-11-12 23:40:00,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32626 to 32574. [2021-11-12 23:40:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32574 states, 23633 states have (on average 1.3397368086996995) internal successors, (31662), 24074 states have internal predecessors, (31662), 7068 states have call successors, (7068), 1874 states have call predecessors, (7068), 1872 states have return successors, (7890), 6865 states have call predecessors, (7890), 7062 states have call successors, (7890) [2021-11-12 23:40:00,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32574 states to 32574 states and 46620 transitions. [2021-11-12 23:40:00,430 INFO L78 Accepts]: Start accepts. Automaton has 32574 states and 46620 transitions. Word has length 156 [2021-11-12 23:40:00,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:00,431 INFO L470 AbstractCegarLoop]: Abstraction has 32574 states and 46620 transitions. [2021-11-12 23:40:00,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 23:40:00,432 INFO L276 IsEmpty]: Start isEmpty. Operand 32574 states and 46620 transitions. [2021-11-12 23:40:00,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-12 23:40:00,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:00,456 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:00,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:00,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:00,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:00,880 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:00,880 INFO L85 PathProgramCache]: Analyzing trace with hash -723791998, now seen corresponding path program 1 times [2021-11-12 23:40:00,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:00,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487440129] [2021-11-12 23:40:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:00,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:00,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:00,888 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:00,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:40:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:08,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 4655 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:40:08,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-12 23:40:09,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-12 23:40:11,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:11,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487440129] [2021-11-12 23:40:11,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487440129] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:11,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [817658817] [2021-11-12 23:40:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:11,493 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:11,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:40:11,494 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:40:11,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 23:40:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:14,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 4655 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:40:14,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-11-12 23:40:15,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-11-12 23:40:16,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [817658817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:16,509 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:40:16,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:40:16,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846185029] [2021-11-12 23:40:16,510 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:16,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:40:16,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:16,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:40:16,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:40:16,512 INFO L87 Difference]: Start difference. First operand 32574 states and 46620 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-12 23:40:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:20,818 INFO L93 Difference]: Finished difference Result 89372 states and 127290 transitions. [2021-11-12 23:40:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:40:20,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 215 [2021-11-12 23:40:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:21,184 INFO L225 Difference]: With dead ends: 89372 [2021-11-12 23:40:21,185 INFO L226 Difference]: Without dead ends: 56844 [2021-11-12 23:40:21,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 847 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:40:21,261 INFO L933 BasicCegarLoop]: 2736 mSDtfsCounter, 1543 mSDsluCounter, 1934 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2343.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 4670 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.79ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2447.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:21,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1543 Valid, 4670 Invalid, 86 Unknown, 0 Unchecked, 6.79ms Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 2447.07ms Time] [2021-11-12 23:40:21,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56844 states. [2021-11-12 23:40:23,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56844 to 56780. [2021-11-12 23:40:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56780 states, 40937 states have (on average 1.326403986613577) internal successors, (54299), 41796 states have internal predecessors, (54299), 12394 states have call successors, (12394), 3450 states have call predecessors, (12394), 3448 states have return successors, (13954), 11989 states have call predecessors, (13954), 12388 states have call successors, (13954) [2021-11-12 23:40:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56780 states to 56780 states and 80647 transitions. [2021-11-12 23:40:24,119 INFO L78 Accepts]: Start accepts. Automaton has 56780 states and 80647 transitions. Word has length 215 [2021-11-12 23:40:24,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:24,120 INFO L470 AbstractCegarLoop]: Abstraction has 56780 states and 80647 transitions. [2021-11-12 23:40:24,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-12 23:40:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 56780 states and 80647 transitions. [2021-11-12 23:40:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-12 23:40:24,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:24,153 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:24,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:24,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:24,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:24,568 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:24,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1936545456, now seen corresponding path program 1 times [2021-11-12 23:40:24,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:24,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742580067] [2021-11-12 23:40:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:24,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:24,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:24,574 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:24,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:40:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:31,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 4475 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:40:31,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 168 proven. 3 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-11-12 23:40:33,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-12 23:40:34,751 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:34,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742580067] [2021-11-12 23:40:34,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742580067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:34,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1559181811] [2021-11-12 23:40:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:34,752 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:34,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:40:34,753 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:40:34,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 23:40:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:37,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 4475 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:40:37,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-11-12 23:40:38,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-11-12 23:40:39,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1559181811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:39,809 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:40:39,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6] total 14 [2021-11-12 23:40:39,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516729076] [2021-11-12 23:40:39,810 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:39,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:40:39,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:39,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:40:39,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:40:39,811 INFO L87 Difference]: Start difference. First operand 56780 states and 80647 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 4 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-12 23:40:42,283 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:44,301 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:46,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:46,368 INFO L93 Difference]: Finished difference Result 99070 states and 140534 transitions. [2021-11-12 23:40:46,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:40:46,368 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 4 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 208 [2021-11-12 23:40:46,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:46,682 INFO L225 Difference]: With dead ends: 99070 [2021-11-12 23:40:46,682 INFO L226 Difference]: Without dead ends: 42322 [2021-11-12 23:40:46,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 816 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:40:46,832 INFO L933 BasicCegarLoop]: 2066 mSDtfsCounter, 28 mSDsluCounter, 8245 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4652.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 10311 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.58ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4746.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:46,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 10311 Invalid, 32 Unknown, 0 Unchecked, 8.58ms Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 2 Unknown, 0 Unchecked, 4746.95ms Time] [2021-11-12 23:40:46,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42322 states. [2021-11-12 23:40:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42322 to 41945. [2021-11-12 23:40:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41945 states, 30190 states have (on average 1.3238489566081484) internal successors, (39967), 30837 states have internal predecessors, (39967), 9164 states have call successors, (9164), 2592 states have call predecessors, (9164), 2590 states have return successors, (10320), 8855 states have call predecessors, (10320), 9158 states have call successors, (10320) [2021-11-12 23:40:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41945 states to 41945 states and 59451 transitions. [2021-11-12 23:40:49,144 INFO L78 Accepts]: Start accepts. Automaton has 41945 states and 59451 transitions. Word has length 208 [2021-11-12 23:40:49,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:49,144 INFO L470 AbstractCegarLoop]: Abstraction has 41945 states and 59451 transitions. [2021-11-12 23:40:49,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 4 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-12 23:40:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 41945 states and 59451 transitions. [2021-11-12 23:40:49,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-12 23:40:49,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:49,176 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:49,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:49,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:49,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:49,592 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:49,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1601389533, now seen corresponding path program 1 times [2021-11-12 23:40:49,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:49,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550395050] [2021-11-12 23:40:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:49,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:49,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:49,601 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:49,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:40:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:57,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 4588 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:40:57,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-12 23:40:58,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-12 23:41:00,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:00,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550395050] [2021-11-12 23:41:00,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550395050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:00,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [60910986] [2021-11-12 23:41:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:00,407 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:00,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:41:00,408 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:41:00,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 23:41:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:03,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 4588 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:41:03,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-11-12 23:41:04,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-11-12 23:41:05,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [60910986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:05,528 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:41:05,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:41:05,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387058401] [2021-11-12 23:41:05,528 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:05,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:41:05,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:05,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:41:05,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:41:05,529 INFO L87 Difference]: Start difference. First operand 41945 states and 59451 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, (47), 2 states have call predecessors, (47), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-12 23:41:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:08,658 INFO L93 Difference]: Finished difference Result 100109 states and 141300 transitions. [2021-11-12 23:41:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:41:08,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 217 [2021-11-12 23:41:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:08,890 INFO L225 Difference]: With dead ends: 100109 [2021-11-12 23:41:08,890 INFO L226 Difference]: Without dead ends: 58212 [2021-11-12 23:41:09,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:41:09,014 INFO L933 BasicCegarLoop]: 2366 mSDtfsCounter, 1398 mSDsluCounter, 1989 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1044.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1398 SdHoareTripleChecker+Valid, 4355 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.30ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1125.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:09,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1398 Valid, 4355 Invalid, 25 Unknown, 0 Unchecked, 6.30ms Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 1125.87ms Time] [2021-11-12 23:41:09,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58212 states. [2021-11-12 23:41:11,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58212 to 57821. [2021-11-12 23:41:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57821 states, 41786 states have (on average 1.324103766811851) internal successors, (55329), 42669 states have internal predecessors, (55329), 12243 states have call successors, (12243), 3793 states have call predecessors, (12243), 3791 states have return successors, (13833), 11766 states have call predecessors, (13833), 12237 states have call successors, (13833) [2021-11-12 23:41:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57821 states to 57821 states and 81405 transitions. [2021-11-12 23:41:11,771 INFO L78 Accepts]: Start accepts. Automaton has 57821 states and 81405 transitions. Word has length 217 [2021-11-12 23:41:11,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:11,772 INFO L470 AbstractCegarLoop]: Abstraction has 57821 states and 81405 transitions. [2021-11-12 23:41:11,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-12 23:41:11,772 INFO L276 IsEmpty]: Start isEmpty. Operand 57821 states and 81405 transitions. [2021-11-12 23:41:11,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-12 23:41:11,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:11,803 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:11,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:12,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-12 23:41:12,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:12,233 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:12,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:12,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1957108566, now seen corresponding path program 1 times [2021-11-12 23:41:12,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:12,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345269732] [2021-11-12 23:41:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:12,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:12,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:12,241 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:12,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:41:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:19,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 4564 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:41:19,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 168 proven. 3 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-11-12 23:41:21,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-12 23:41:22,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:22,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345269732] [2021-11-12 23:41:22,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345269732] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:22,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1916061540] [2021-11-12 23:41:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:22,940 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:22,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:41:22,941 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:41:22,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 23:41:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:25,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 4564 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:41:25,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-11-12 23:41:27,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-11-12 23:41:28,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1916061540] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:28,265 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:41:28,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 13 [2021-11-12 23:41:28,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919303200] [2021-11-12 23:41:28,266 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:28,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:41:28,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:28,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:41:28,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:41:28,267 INFO L87 Difference]: Start difference. First operand 57821 states and 81405 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 4 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-12 23:41:30,745 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:33,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:33,732 INFO L93 Difference]: Finished difference Result 115472 states and 162567 transitions. [2021-11-12 23:41:33,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:41:33,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 4 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 216 [2021-11-12 23:41:33,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:33,913 INFO L225 Difference]: With dead ends: 115472 [2021-11-12 23:41:33,913 INFO L226 Difference]: Without dead ends: 57724 [2021-11-12 23:41:34,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 863 GetRequests, 849 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:41:34,021 INFO L933 BasicCegarLoop]: 2078 mSDtfsCounter, 40 mSDsluCounter, 6190 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2673.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 8268 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.00ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2755.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:34,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 8268 Invalid, 33 Unknown, 0 Unchecked, 9.00ms Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 1 Unknown, 0 Unchecked, 2755.82ms Time] [2021-11-12 23:41:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57724 states. [2021-11-12 23:41:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57724 to 57591. [2021-11-12 23:41:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57591 states, 41639 states have (on average 1.3246475659838133) internal successors, (55157), 42523 states have internal predecessors, (55157), 12183 states have call successors, (12183), 3770 states have call predecessors, (12183), 3768 states have return successors, (13773), 11705 states have call predecessors, (13773), 12177 states have call successors, (13773) [2021-11-12 23:41:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57591 states to 57591 states and 81113 transitions. [2021-11-12 23:41:36,553 INFO L78 Accepts]: Start accepts. Automaton has 57591 states and 81113 transitions. Word has length 216 [2021-11-12 23:41:36,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:36,554 INFO L470 AbstractCegarLoop]: Abstraction has 57591 states and 81113 transitions. [2021-11-12 23:41:36,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 4 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-12 23:41:36,554 INFO L276 IsEmpty]: Start isEmpty. Operand 57591 states and 81113 transitions. [2021-11-12 23:41:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-12 23:41:36,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:36,577 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:36,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-12 23:41:36,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:36,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:36,996 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash -925728685, now seen corresponding path program 1 times [2021-11-12 23:41:37,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:37,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846484960] [2021-11-12 23:41:37,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:37,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:37,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:37,004 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:37,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:41:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:44,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 4606 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:41:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2021-11-12 23:41:46,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2021-11-12 23:41:48,190 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:48,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846484960] [2021-11-12 23:41:48,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846484960] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:48,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [421817866] [2021-11-12 23:41:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:48,190 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:48,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:41:48,191 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:41:48,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 23:41:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:51,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 4606 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:41:51,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2021-11-12 23:41:52,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2021-11-12 23:41:53,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [421817866] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:53,491 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:41:53,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 15 [2021-11-12 23:41:53,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193132171] [2021-11-12 23:41:53,494 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:53,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:41:53,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:53,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:41:53,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:41:53,496 INFO L87 Difference]: Start difference. First operand 57591 states and 81113 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-12 23:41:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:58,345 INFO L93 Difference]: Finished difference Result 131773 states and 192011 transitions. [2021-11-12 23:41:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:41:58,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) Word has length 221 [2021-11-12 23:41:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:58,705 INFO L225 Difference]: With dead ends: 131773 [2021-11-12 23:41:58,705 INFO L226 Difference]: Without dead ends: 95029 [2021-11-12 23:41:58,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 868 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:41:58,783 INFO L933 BasicCegarLoop]: 3930 mSDtfsCounter, 1312 mSDsluCounter, 17250 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 687.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 21180 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.65ms SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 783.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:58,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 21180 Invalid, 342 Unknown, 0 Unchecked, 29.65ms Time], IncrementalHoareTripleChecker [301 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 783.58ms Time] [2021-11-12 23:41:58,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95029 states. [2021-11-12 23:42:01,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95029 to 55962. [2021-11-12 23:42:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55962 states, 40520 states have (on average 1.3252221125370187) internal successors, (53698), 41358 states have internal predecessors, (53698), 11788 states have call successors, (11788), 3627 states have call predecessors, (11788), 3653 states have return successors, (13284), 11372 states have call predecessors, (13284), 11784 states have call successors, (13284) [2021-11-12 23:42:02,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55962 states to 55962 states and 78770 transitions. [2021-11-12 23:42:02,111 INFO L78 Accepts]: Start accepts. Automaton has 55962 states and 78770 transitions. Word has length 221 [2021-11-12 23:42:02,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:02,112 INFO L470 AbstractCegarLoop]: Abstraction has 55962 states and 78770 transitions. [2021-11-12 23:42:02,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-12 23:42:02,112 INFO L276 IsEmpty]: Start isEmpty. Operand 55962 states and 78770 transitions. [2021-11-12 23:42:02,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-12 23:42:02,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:02,134 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:02,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:02,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:02,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:02,556 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:02,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:02,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1200488299, now seen corresponding path program 1 times [2021-11-12 23:42:02,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:02,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398531997] [2021-11-12 23:42:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:02,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:02,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:02,563 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:02,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:42:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:10,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 4607 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:42:10,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2021-11-12 23:42:11,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2021-11-12 23:42:13,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:13,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398531997] [2021-11-12 23:42:13,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398531997] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:13,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1448818134] [2021-11-12 23:42:13,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:13,757 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:13,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:42:13,762 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:42:13,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-12 23:42:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:16,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 4607 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:42:16,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2021-11-12 23:42:19,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2021-11-12 23:42:20,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1448818134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:20,274 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:42:20,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [6, 6] total 15 [2021-11-12 23:42:20,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657365777] [2021-11-12 23:42:20,275 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:20,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:42:20,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:20,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:42:20,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:42:20,276 INFO L87 Difference]: Start difference. First operand 55962 states and 78770 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-12 23:42:23,977 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:27,541 INFO L93 Difference]: Finished difference Result 111909 states and 157503 transitions. [2021-11-12 23:42:27,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:42:27,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) Word has length 221 [2021-11-12 23:42:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:27,785 INFO L225 Difference]: With dead ends: 111909 [2021-11-12 23:42:27,785 INFO L226 Difference]: Without dead ends: 56057 [2021-11-12 23:42:27,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 868 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:42:27,925 INFO L933 BasicCegarLoop]: 2067 mSDtfsCounter, 1059 mSDsluCounter, 7356 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 95 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3499.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 9423 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.05ms SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3636.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:27,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 9423 Invalid, 178 Unknown, 0 Unchecked, 18.05ms Time], IncrementalHoareTripleChecker [95 Valid, 82 Invalid, 1 Unknown, 0 Unchecked, 3636.68ms Time] [2021-11-12 23:42:27,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56057 states. [2021-11-12 23:42:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56057 to 55968. [2021-11-12 23:42:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55968 states, 40526 states have (on average 1.325124611360608) internal successors, (53702), 41364 states have internal predecessors, (53702), 11788 states have call successors, (11788), 3627 states have call predecessors, (11788), 3653 states have return successors, (13284), 11372 states have call predecessors, (13284), 11784 states have call successors, (13284) [2021-11-12 23:42:30,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55968 states to 55968 states and 78774 transitions. [2021-11-12 23:42:30,685 INFO L78 Accepts]: Start accepts. Automaton has 55968 states and 78774 transitions. Word has length 221 [2021-11-12 23:42:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:30,685 INFO L470 AbstractCegarLoop]: Abstraction has 55968 states and 78774 transitions. [2021-11-12 23:42:30,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-12 23:42:30,685 INFO L276 IsEmpty]: Start isEmpty. Operand 55968 states and 78774 transitions. [2021-11-12 23:42:30,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-12 23:42:30,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:30,701 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:30,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:30,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:31,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:31,102 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:31,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:31,104 INFO L85 PathProgramCache]: Analyzing trace with hash 697008467, now seen corresponding path program 1 times [2021-11-12 23:42:31,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:31,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980142926] [2021-11-12 23:42:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:31,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:31,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:31,111 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:31,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:42:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:38,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 4607 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:42:38,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2021-11-12 23:42:40,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2021-11-12 23:42:43,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:43,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980142926] [2021-11-12 23:42:43,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980142926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:43,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [914793434] [2021-11-12 23:42:43,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:43,059 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:43,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:42:43,059 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:42:43,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 23:42:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:46,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 4607 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:42:46,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2021-11-12 23:42:50,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2021-11-12 23:42:54,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [914793434] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:54,457 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:42:54,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [6, 6] total 23 [2021-11-12 23:42:54,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39356580] [2021-11-12 23:42:54,458 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:54,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 23:42:54,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 23:42:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:42:54,460 INFO L87 Difference]: Start difference. First operand 55968 states and 78774 transitions. Second operand has 15 states, 15 states have (on average 10.133333333333333) internal successors, (152), 13 states have internal predecessors, (152), 5 states have call successors, (58), 2 states have call predecessors, (58), 4 states have return successors, (57), 7 states have call predecessors, (57), 5 states have call successors, (57) [2021-11-12 23:43:01,959 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:07,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:07,472 INFO L93 Difference]: Finished difference Result 112166 states and 158029 transitions. [2021-11-12 23:43:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 23:43:07,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 10.133333333333333) internal successors, (152), 13 states have internal predecessors, (152), 5 states have call successors, (58), 2 states have call predecessors, (58), 4 states have return successors, (57), 7 states have call predecessors, (57), 5 states have call successors, (57) Word has length 221 [2021-11-12 23:43:07,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:07,708 INFO L225 Difference]: With dead ends: 112166 [2021-11-12 23:43:07,709 INFO L226 Difference]: Without dead ends: 56277 [2021-11-12 23:43:07,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 860 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2021-11-12 23:43:07,860 INFO L933 BasicCegarLoop]: 2063 mSDtfsCounter, 1174 mSDsluCounter, 17656 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 121 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5602.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1338 SdHoareTripleChecker+Valid, 19719 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.56ms SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5799.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:07,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1338 Valid, 19719 Invalid, 358 Unknown, 0 Unchecked, 27.56ms Time], IncrementalHoareTripleChecker [121 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 5799.13ms Time] [2021-11-12 23:43:07,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56277 states. [2021-11-12 23:43:10,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56277 to 56034. [2021-11-12 23:43:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56034 states, 40568 states have (on average 1.3247633602839677) internal successors, (53743), 41415 states have internal predecessors, (53743), 11800 states have call successors, (11800), 3627 states have call predecessors, (11800), 3665 states have return successors, (13308), 11387 states have call predecessors, (13308), 11796 states have call successors, (13308) [2021-11-12 23:43:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56034 states to 56034 states and 78851 transitions. [2021-11-12 23:43:10,687 INFO L78 Accepts]: Start accepts. Automaton has 56034 states and 78851 transitions. Word has length 221 [2021-11-12 23:43:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:10,687 INFO L470 AbstractCegarLoop]: Abstraction has 56034 states and 78851 transitions. [2021-11-12 23:43:10,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.133333333333333) internal successors, (152), 13 states have internal predecessors, (152), 5 states have call successors, (58), 2 states have call predecessors, (58), 4 states have return successors, (57), 7 states have call predecessors, (57), 5 states have call successors, (57) [2021-11-12 23:43:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 56034 states and 78851 transitions. [2021-11-12 23:43:10,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-12 23:43:10,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:10,703 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:10,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:10,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-12 23:43:11,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:11,108 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash 591635167, now seen corresponding path program 1 times [2021-11-12 23:43:11,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:11,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760487485] [2021-11-12 23:43:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:11,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:11,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:11,115 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:11,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:43:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:18,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 4708 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:43:18,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-12 23:43:21,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2021-11-12 23:43:23,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:23,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760487485] [2021-11-12 23:43:23,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760487485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:23,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [27021863] [2021-11-12 23:43:23,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:23,915 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:23,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:43:23,916 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:43:23,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62d7f4dd-1ae3-481b-8ec4-d8bab471ef58/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 23:43:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:27,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 4708 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:43:27,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-11-12 23:43:29,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2021-11-12 23:43:30,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [27021863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:30,412 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:43:30,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-12 23:43:30,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499453519] [2021-11-12 23:43:30,413 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:30,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:43:30,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:30,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:43:30,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:43:30,415 INFO L87 Difference]: Start difference. First operand 56034 states and 78851 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 4 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) [2021-11-12 23:43:32,986 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 [] [2021-11-12 23:43:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:47,754 INFO L93 Difference]: Finished difference Result 165947 states and 233507 transitions. [2021-11-12 23:43:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:43:47,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 4 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) Word has length 249 [2021-11-12 23:43:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:48,452 INFO L225 Difference]: With dead ends: 165947 [2021-11-12 23:43:48,452 INFO L226 Difference]: Without dead ends: 110028 [2021-11-12 23:43:48,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 982 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:43:48,575 INFO L933 BasicCegarLoop]: 3276 mSDtfsCounter, 4944 mSDsluCounter, 3277 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 542 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11916.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4944 SdHoareTripleChecker+Valid, 6553 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.78ms SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12555.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:48,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4944 Valid, 6553 Invalid, 1184 Unknown, 0 Unchecked, 21.78ms Time], IncrementalHoareTripleChecker [542 Valid, 641 Invalid, 1 Unknown, 0 Unchecked, 12555.13ms Time] [2021-11-12 23:43:48,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110028 states.