./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.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_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/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_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/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_09f70bc1-95c3-418f-9b12-603baaf6e020/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 4442f8b76e61cf25cc45d29938cede5ddeca8e04e09b48cb8e4f2b249d1a9c57 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:35:41,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:35:41,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:35:41,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:35:41,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:35:41,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:35:41,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:35:41,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:35:41,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:35:41,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:35:41,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:35:41,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:35:41,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:35:41,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:35:41,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:35:41,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:35:41,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:35:41,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:35:41,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:35:41,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:35:41,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:35:41,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:35:41,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:35:41,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:35:41,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:35:41,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:35:41,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:35:41,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:35:41,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:35:41,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:35:41,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:35:41,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:35:41,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:35:41,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:35:41,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:35:41,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:35:41,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:35:41,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:35:41,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:35:41,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:35:41,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:35:41,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 01:35:41,681 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:35:41,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:35:41,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:35:41,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:35:41,683 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:35:41,683 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:35:41,683 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:35:41,683 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:35:41,683 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:35:41,684 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:35:41,684 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:35:41,684 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:35:41,684 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:35:41,684 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:35:41,685 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:35:41,685 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:35:41,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:35:41,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:35:41,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:35:41,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:35:41,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:35:41,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:35:41,687 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:35:41,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:35:41,687 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:35:41,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:35:41,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:35:41,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:35:41,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:35:41,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:35:41,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:35:41,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:35:41,688 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:35:41,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:35:41,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:35:41,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:35:41,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:35:41,689 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_09f70bc1-95c3-418f-9b12-603baaf6e020/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4442f8b76e61cf25cc45d29938cede5ddeca8e04e09b48cb8e4f2b249d1a9c57 [2021-11-13 01:35:41,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:35:42,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:35:42,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:35:42,030 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:35:42,031 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:35:42,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i [2021-11-13 01:35:42,119 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/data/1179a49d2/30f77bff304e4de1a31776aacdd28bad/FLAG50ca596e0 [2021-11-13 01:35:43,111 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:35:43,112 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i [2021-11-13 01:35:43,148 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/data/1179a49d2/30f77bff304e4de1a31776aacdd28bad/FLAG50ca596e0 [2021-11-13 01:35:43,514 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/data/1179a49d2/30f77bff304e4de1a31776aacdd28bad [2021-11-13 01:35:43,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:35:43,517 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:35:43,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:35:43,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:35:43,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:35:43,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:35:43" (1/1) ... [2021-11-13 01:35:43,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@469c93dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:43, skipping insertion in model container [2021-11-13 01:35:43,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:35:43" (1/1) ... [2021-11-13 01:35:43,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:35:43,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:35:44,684 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_09f70bc1-95c3-418f-9b12-603baaf6e020/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i[167793,167806] [2021-11-13 01:35:45,401 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 01:35:45,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:35:45,582 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) [2021-11-13 01:35:45,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f291e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:45, skipping insertion in model container [2021-11-13 01:35:45,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:35:45,583 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:35:45,585 INFO L158 Benchmark]: Toolchain (without parser) took 2066.95ms. Allocated memory was 115.3MB in the beginning and 159.4MB in the end (delta: 44.0MB). Free memory was 71.2MB in the beginning and 101.1MB in the end (delta: -29.9MB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. [2021-11-13 01:35:45,586 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 81.8MB. Free memory was 38.2MB in the beginning and 38.2MB in the end (delta: 41.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:35:45,588 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2064.33ms. Allocated memory was 115.3MB in the beginning and 159.4MB in the end (delta: 44.0MB). Free memory was 71.2MB in the beginning and 101.1MB in the end (delta: -29.9MB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. [2021-11-13 01:35:45,590 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 81.8MB. Free memory was 38.2MB in the beginning and 38.2MB in the end (delta: 41.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2064.33ms. Allocated memory was 115.3MB in the beginning and 159.4MB in the end (delta: 44.0MB). Free memory was 71.2MB in the beginning and 101.1MB in the end (delta: -29.9MB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5924]: 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_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/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_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/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_09f70bc1-95c3-418f-9b12-603baaf6e020/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 4442f8b76e61cf25cc45d29938cede5ddeca8e04e09b48cb8e4f2b249d1a9c57 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:35:47,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:35:47,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:35:47,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:35:47,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:35:47,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:35:47,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:35:47,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:35:47,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:35:47,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:35:47,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:35:47,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:35:47,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:35:47,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:35:47,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:35:47,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:35:47,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:35:47,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:35:47,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:35:47,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:35:47,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:35:47,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:35:47,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:35:47,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:35:47,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:35:47,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:35:47,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:35:47,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:35:47,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:35:47,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:35:48,001 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:35:48,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:35:48,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:35:48,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:35:48,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:35:48,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:35:48,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:35:48,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:35:48,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:35:48,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:35:48,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:35:48,030 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 01:35:48,093 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:35:48,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:35:48,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:35:48,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:35:48,095 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:35:48,096 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:35:48,096 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:35:48,096 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:35:48,096 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:35:48,097 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:35:48,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:35:48,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:35:48,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:35:48,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:35:48,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:35:48,101 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:35:48,101 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:35:48,101 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:35:48,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:35:48,102 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:35:48,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:35:48,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:35:48,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:35:48,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:35:48,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:35:48,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:35:48,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:35:48,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:35:48,104 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:35:48,104 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:48,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:35:48,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:35:48,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:35:48,105 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_09f70bc1-95c3-418f-9b12-603baaf6e020/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4442f8b76e61cf25cc45d29938cede5ddeca8e04e09b48cb8e4f2b249d1a9c57 [2021-11-13 01:35:48,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:35:48,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:35:48,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:35:48,586 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:35:48,587 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:35:48,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i [2021-11-13 01:35:48,667 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/data/977507167/b6472120a9074a7cb3e7ae5eef1ced5f/FLAGee43c2bc4 [2021-11-13 01:35:49,671 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:35:49,672 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i [2021-11-13 01:35:49,734 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/data/977507167/b6472120a9074a7cb3e7ae5eef1ced5f/FLAGee43c2bc4 [2021-11-13 01:35:50,053 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/data/977507167/b6472120a9074a7cb3e7ae5eef1ced5f [2021-11-13 01:35:50,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:35:50,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:35:50,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:35:50,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:35:50,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:35:50,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:35:50" (1/1) ... [2021-11-13 01:35:50,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2457ecfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:50, skipping insertion in model container [2021-11-13 01:35:50,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:35:50" (1/1) ... [2021-11-13 01:35:50,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:35:50,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:35:51,566 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_09f70bc1-95c3-418f-9b12-603baaf6e020/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i[167793,167806] [2021-11-13 01:35:52,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:35:52,559 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:35:52,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:35:52,819 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_09f70bc1-95c3-418f-9b12-603baaf6e020/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i[167793,167806] [2021-11-13 01:35:53,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:35:53,086 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:35:53,336 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_09f70bc1-95c3-418f-9b12-603baaf6e020/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i[167793,167806] [2021-11-13 01:35:53,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:35:53,740 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:35:53,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:53 WrapperNode [2021-11-13 01:35:53,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:35:53,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:35:53,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:35:53,743 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:35:53,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:53" (1/1) ... [2021-11-13 01:35:53,867 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:53" (1/1) ... [2021-11-13 01:35:54,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:35:54,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:35:54,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:35:54,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:35:54,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:53" (1/1) ... [2021-11-13 01:35:54,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:53" (1/1) ... [2021-11-13 01:35:54,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:53" (1/1) ... [2021-11-13 01:35:54,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:53" (1/1) ... [2021-11-13 01:35:54,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:53" (1/1) ... [2021-11-13 01:35:54,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:53" (1/1) ... [2021-11-13 01:35:54,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:53" (1/1) ... [2021-11-13 01:35:54,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:35:54,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:35:54,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:35:54,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:35:54,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:53" (1/1) ... [2021-11-13 01:35:54,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:35:54,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:35:54,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:35:54,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:35:54,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 01:35:54,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 01:35:54,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 01:35:54,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 01:35:54,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 01:35:54,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 01:35:54,463 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 01:35:54,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 01:35:54,464 INFO L130 BoogieDeclarations]: Found specification of procedure nla_put_u32 [2021-11-13 01:35:54,464 INFO L138 BoogieDeclarations]: Found implementation of procedure nla_put_u32 [2021-11-13 01:35:54,464 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-13 01:35:54,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-13 01:35:54,465 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 01:35:54,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 01:35:54,465 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_4 [2021-11-13 01:35:54,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_4 [2021-11-13 01:35:54,466 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-13 01:35:54,466 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-13 01:35:54,466 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-13 01:35:54,466 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-13 01:35:54,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 01:35:54,467 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 01:35:54,467 INFO L130 BoogieDeclarations]: Found specification of procedure can_newlink [2021-11-13 01:35:54,467 INFO L138 BoogieDeclarations]: Found implementation of procedure can_newlink [2021-11-13 01:35:54,467 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 01:35:54,467 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 01:35:54,468 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2021-11-13 01:35:54,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2021-11-13 01:35:54,468 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netdev_alloc_skb_25 [2021-11-13 01:35:54,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netdev_alloc_skb_25 [2021-11-13 01:35:54,469 INFO L130 BoogieDeclarations]: Found specification of procedure can_fill_xstats [2021-11-13 01:35:54,469 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fill_xstats [2021-11-13 01:35:54,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:35:54,469 INFO L130 BoogieDeclarations]: Found specification of procedure led_trigger_rename_static [2021-11-13 01:35:54,469 INFO L138 BoogieDeclarations]: Found implementation of procedure led_trigger_rename_static [2021-11-13 01:35:54,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 01:35:54,470 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-13 01:35:54,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-13 01:35:54,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 01:35:54,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 01:35:54,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 01:35:54,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 01:35:54,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 01:35:54,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 01:35:54,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-13 01:35:54,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:35:54,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 01:35:54,472 INFO L130 BoogieDeclarations]: Found specification of procedure nla_total_size [2021-11-13 01:35:54,472 INFO L138 BoogieDeclarations]: Found implementation of procedure nla_total_size [2021-11-13 01:35:54,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 01:35:54,473 INFO L130 BoogieDeclarations]: Found specification of procedure nla_data [2021-11-13 01:35:54,473 INFO L138 BoogieDeclarations]: Found implementation of procedure nla_data [2021-11-13 01:35:54,473 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-13 01:35:54,473 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-13 01:35:54,474 INFO L130 BoogieDeclarations]: Found specification of procedure can_update_spt [2021-11-13 01:35:54,474 INFO L138 BoogieDeclarations]: Found implementation of procedure can_update_spt [2021-11-13 01:35:54,474 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 01:35:54,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 01:35:54,474 INFO L130 BoogieDeclarations]: Found specification of procedure can_restart [2021-11-13 01:35:54,475 INFO L138 BoogieDeclarations]: Found implementation of procedure can_restart [2021-11-13 01:35:54,475 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_1 [2021-11-13 01:35:54,475 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_1 [2021-11-13 01:35:54,475 INFO L130 BoogieDeclarations]: Found specification of procedure can_skb_reserve [2021-11-13 01:35:54,476 INFO L138 BoogieDeclarations]: Found implementation of procedure can_skb_reserve [2021-11-13 01:35:54,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 01:35:54,476 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 01:35:54,476 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-11-13 01:35:54,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-11-13 01:35:54,477 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-13 01:35:54,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-13 01:35:54,477 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2021-11-13 01:35:54,477 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2021-11-13 01:35:54,477 INFO L130 BoogieDeclarations]: Found specification of procedure can_skb_prv [2021-11-13 01:35:54,478 INFO L138 BoogieDeclarations]: Found implementation of procedure can_skb_prv [2021-11-13 01:35:54,478 INFO L130 BoogieDeclarations]: Found specification of procedure can_flush_echo_skb [2021-11-13 01:35:54,478 INFO L138 BoogieDeclarations]: Found implementation of procedure can_flush_echo_skb [2021-11-13 01:35:54,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-13 01:35:54,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-13 01:35:54,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-13 01:35:54,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-13 01:35:54,479 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-13 01:35:54,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-13 01:35:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 01:35:54,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 01:35:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 01:35:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2021-11-13 01:35:54,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2021-11-13 01:35:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 01:35:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure nla_put [2021-11-13 01:35:54,481 INFO L138 BoogieDeclarations]: Found implementation of procedure nla_put [2021-11-13 01:35:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-13 01:35:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-13 01:35:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-13 01:35:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure can_get_xstats_size [2021-11-13 01:35:54,482 INFO L138 BoogieDeclarations]: Found implementation of procedure can_get_xstats_size [2021-11-13 01:35:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-13 01:35:54,482 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-13 01:35:54,483 INFO L130 BoogieDeclarations]: Found specification of procedure can_get_bittiming [2021-11-13 01:35:54,483 INFO L138 BoogieDeclarations]: Found implementation of procedure can_get_bittiming [2021-11-13 01:35:54,483 INFO L130 BoogieDeclarations]: Found specification of procedure can_fill_info [2021-11-13 01:35:54,483 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fill_info [2021-11-13 01:35:54,483 INFO L130 BoogieDeclarations]: Found specification of procedure can_get_size [2021-11-13 01:35:54,484 INFO L138 BoogieDeclarations]: Found implementation of procedure can_get_size [2021-11-13 01:35:54,484 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-13 01:35:54,484 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-13 01:35:54,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-13 01:35:54,484 INFO L130 BoogieDeclarations]: Found specification of procedure can_changelink [2021-11-13 01:35:54,485 INFO L138 BoogieDeclarations]: Found implementation of procedure can_changelink [2021-11-13 01:35:54,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:35:54,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:35:58,721 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 01:36:19,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:36:19,394 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 01:36:19,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:36:19 BoogieIcfgContainer [2021-11-13 01:36:19,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:36:19,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:36:19,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:36:19,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:36:19,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:35:50" (1/3) ... [2021-11-13 01:36:19,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a149fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:36:19, skipping insertion in model container [2021-11-13 01:36:19,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:53" (2/3) ... [2021-11-13 01:36:19,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a149fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:36:19, skipping insertion in model container [2021-11-13 01:36:19,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:36:19" (3/3) ... [2021-11-13 01:36:19,451 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i [2021-11-13 01:36:19,467 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:36:19,471 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:36:19,552 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:36:19,560 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 [2021-11-13 01:36:19,560 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:36:19,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 667 states, 502 states have (on average 1.4143426294820718) internal successors, (710), 516 states have internal predecessors, (710), 124 states have call successors, (124), 40 states have call predecessors, (124), 39 states have return successors, (119), 116 states have call predecessors, (119), 119 states have call successors, (119) [2021-11-13 01:36:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 01:36:19,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:19,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:19,643 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:19,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:19,651 INFO L85 PathProgramCache]: Analyzing trace with hash 2107714726, now seen corresponding path program 1 times [2021-11-13 01:36:19,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:19,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426273801] [2021-11-13 01:36:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:19,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:19,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:19,677 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:19,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:36:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:21,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:36:21,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:22,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:22,163 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:22,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426273801] [2021-11-13 01:36:22,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426273801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:22,164 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:22,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:36:22,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303479345] [2021-11-13 01:36:22,167 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:22,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:36:22,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:22,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:36:22,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:36:22,209 INFO L87 Difference]: Start difference. First operand has 667 states, 502 states have (on average 1.4143426294820718) internal successors, (710), 516 states have internal predecessors, (710), 124 states have call successors, (124), 40 states have call predecessors, (124), 39 states have return successors, (119), 116 states have call predecessors, (119), 119 states have call successors, (119) Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 01:36:24,363 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 [] [2021-11-13 01:36:26,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:26,837 INFO L93 Difference]: Finished difference Result 2580 states and 3764 transitions. [2021-11-13 01:36:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:36:26,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-13 01:36:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:26,884 INFO L225 Difference]: With dead ends: 2580 [2021-11-13 01:36:26,885 INFO L226 Difference]: Without dead ends: 1891 [2021-11-13 01:36:26,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:36:26,908 INFO L933 BasicCegarLoop]: 1174 mSDtfsCounter, 2453 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 237 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3988.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2453 SdHoareTripleChecker+Valid, 2755 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.93ms SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4332.72ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:26,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2453 Valid, 2755 Invalid, 487 Unknown, 0 Unchecked, 37.93ms Time], IncrementalHoareTripleChecker [237 Valid, 249 Invalid, 1 Unknown, 0 Unchecked, 4332.72ms Time] [2021-11-13 01:36:26,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-11-13 01:36:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1891. [2021-11-13 01:36:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1433 states have (on average 1.3977669225401257) internal successors, (2003), 1454 states have internal predecessors, (2003), 343 states have call successors, (343), 115 states have call predecessors, (343), 114 states have return successors, (342), 333 states have call predecessors, (342), 342 states have call successors, (342) [2021-11-13 01:36:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 2688 transitions. [2021-11-13 01:36:27,204 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 2688 transitions. Word has length 27 [2021-11-13 01:36:27,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:27,204 INFO L470 AbstractCegarLoop]: Abstraction has 1891 states and 2688 transitions. [2021-11-13 01:36:27,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 01:36:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 2688 transitions. [2021-11-13 01:36:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 01:36:27,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:27,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:27,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:27,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:27,438 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:27,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:27,439 INFO L85 PathProgramCache]: Analyzing trace with hash -607688512, now seen corresponding path program 1 times [2021-11-13 01:36:27,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:27,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985692101] [2021-11-13 01:36:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:27,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:27,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:27,450 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:27,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:36:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:29,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:29,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:29,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:29,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:29,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985692101] [2021-11-13 01:36:29,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985692101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:29,947 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:29,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 01:36:29,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680465821] [2021-11-13 01:36:29,948 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:29,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:36:29,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:29,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:36:29,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:36:29,951 INFO L87 Difference]: Start difference. First operand 1891 states and 2688 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 01:36:30,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:30,703 INFO L93 Difference]: Finished difference Result 4078 states and 5858 transitions. [2021-11-13 01:36:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:36:30,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-11-13 01:36:30,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:30,726 INFO L225 Difference]: With dead ends: 4078 [2021-11-13 01:36:30,727 INFO L226 Difference]: Without dead ends: 2194 [2021-11-13 01:36:30,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:36:30,739 INFO L933 BasicCegarLoop]: 1127 mSDtfsCounter, 1336 mSDsluCounter, 1923 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 450.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 3050 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.85ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 516.04ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:30,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1336 Valid, 3050 Invalid, 133 Unknown, 0 Unchecked, 16.85ms Time], IncrementalHoareTripleChecker [80 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 516.04ms Time] [2021-11-13 01:36:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-11-13 01:36:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 1894. [2021-11-13 01:36:30,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1436 states have (on average 1.3962395543175488) internal successors, (2005), 1457 states have internal predecessors, (2005), 343 states have call successors, (343), 115 states have call predecessors, (343), 114 states have return successors, (342), 333 states have call predecessors, (342), 342 states have call successors, (342) [2021-11-13 01:36:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2690 transitions. [2021-11-13 01:36:30,985 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2690 transitions. Word has length 32 [2021-11-13 01:36:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:30,986 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 2690 transitions. [2021-11-13 01:36:30,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 01:36:30,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2690 transitions. [2021-11-13 01:36:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 01:36:30,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:30,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:31,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:31,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:31,215 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:31,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:31,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1000715522, now seen corresponding path program 1 times [2021-11-13 01:36:31,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:31,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855630348] [2021-11-13 01:36:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:31,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:31,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:31,226 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:31,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:36:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:33,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:33,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:33,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:33,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:33,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855630348] [2021-11-13 01:36:33,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855630348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:33,697 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:33,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-13 01:36:33,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382445265] [2021-11-13 01:36:33,697 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:33,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:36:33,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:33,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:36:33,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:36:33,699 INFO L87 Difference]: Start difference. First operand 1894 states and 2690 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 01:36:34,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:34,377 INFO L93 Difference]: Finished difference Result 5665 states and 8115 transitions. [2021-11-13 01:36:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:36:34,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-11-13 01:36:34,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:34,413 INFO L225 Difference]: With dead ends: 5665 [2021-11-13 01:36:34,414 INFO L226 Difference]: Without dead ends: 3771 [2021-11-13 01:36:34,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:36:34,430 INFO L933 BasicCegarLoop]: 1124 mSDtfsCounter, 900 mSDsluCounter, 4292 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 317.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 5416 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.38ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 358.03ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:34,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 5416 Invalid, 54 Unknown, 0 Unchecked, 19.38ms Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 358.03ms Time] [2021-11-13 01:36:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3771 states. [2021-11-13 01:36:34,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3771 to 3759. [2021-11-13 01:36:34,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 2846 states have (on average 1.3970484891075192) internal successors, (3976), 2888 states have internal predecessors, (3976), 684 states have call successors, (684), 229 states have call predecessors, (684), 228 states have return successors, (722), 665 states have call predecessors, (722), 683 states have call successors, (722) [2021-11-13 01:36:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5382 transitions. [2021-11-13 01:36:34,806 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5382 transitions. Word has length 32 [2021-11-13 01:36:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:34,807 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5382 transitions. [2021-11-13 01:36:34,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 01:36:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5382 transitions. [2021-11-13 01:36:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 01:36:34,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:34,834 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:34,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:35,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:35,057 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:35,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:35,058 INFO L85 PathProgramCache]: Analyzing trace with hash -912178755, now seen corresponding path program 1 times [2021-11-13 01:36:35,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:35,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465769505] [2021-11-13 01:36:35,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:35,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:35,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:35,065 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:35,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:36:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:37,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:36:37,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 01:36:38,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 01:36:39,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:39,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465769505] [2021-11-13 01:36:39,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465769505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:39,231 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:39,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 01:36:39,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021460247] [2021-11-13 01:36:39,232 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:39,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:36:39,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:39,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:36:39,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:36:39,234 INFO L87 Difference]: Start difference. First operand 3759 states and 5382 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 01:36:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:39,526 INFO L93 Difference]: Finished difference Result 7547 states and 10893 transitions. [2021-11-13 01:36:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:36:39,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 132 [2021-11-13 01:36:39,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:39,562 INFO L225 Difference]: With dead ends: 7547 [2021-11-13 01:36:39,563 INFO L226 Difference]: Without dead ends: 3795 [2021-11-13 01:36:39,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:36:39,588 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 2 mSDsluCounter, 2767 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3691 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.55ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.14ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:39,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3691 Invalid, 12 Unknown, 0 Unchecked, 10.55ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 44.14ms Time] [2021-11-13 01:36:39,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-11-13 01:36:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 3789. [2021-11-13 01:36:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 2867 states have (on average 1.394140216253924) internal successors, (3997), 2912 states have internal predecessors, (3997), 684 states have call successors, (684), 229 states have call predecessors, (684), 237 states have return successors, (754), 671 states have call predecessors, (754), 683 states have call successors, (754) [2021-11-13 01:36:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 5435 transitions. [2021-11-13 01:36:39,845 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 5435 transitions. Word has length 132 [2021-11-13 01:36:39,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:39,848 INFO L470 AbstractCegarLoop]: Abstraction has 3789 states and 5435 transitions. [2021-11-13 01:36:39,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 01:36:39,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 5435 transitions. [2021-11-13 01:36:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-13 01:36:39,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:39,876 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:39,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:40,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:40,090 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:40,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1573276996, now seen corresponding path program 1 times [2021-11-13 01:36:40,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:40,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002222278] [2021-11-13 01:36:40,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:40,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:40,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:40,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:40,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:36:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:42,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1279 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-13 01:36:42,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:36:44,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 01:36:49,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:49,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002222278] [2021-11-13 01:36:49,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002222278] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:49,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:36:49,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [15] total 26 [2021-11-13 01:36:49,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481518063] [2021-11-13 01:36:49,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:49,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 01:36:49,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:49,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 01:36:49,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-11-13 01:36:49,333 INFO L87 Difference]: Start difference. First operand 3789 states and 5435 transitions. Second operand has 15 states, 14 states have (on average 7.214285714285714) internal successors, (101), 11 states have internal predecessors, (101), 4 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (16), 7 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 01:36:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:52,072 INFO L93 Difference]: Finished difference Result 8021 states and 11611 transitions. [2021-11-13 01:36:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 01:36:52,073 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 7.214285714285714) internal successors, (101), 11 states have internal predecessors, (101), 4 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (16), 7 states have call predecessors, (16), 4 states have call successors, (16) Word has length 139 [2021-11-13 01:36:52,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:52,110 INFO L225 Difference]: With dead ends: 8021 [2021-11-13 01:36:52,110 INFO L226 Difference]: Without dead ends: 4239 [2021-11-13 01:36:52,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-11-13 01:36:52,133 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 85 mSDsluCounter, 12916 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1598.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 13922 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.14ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1758.76ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:52,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 13922 Invalid, 306 Unknown, 0 Unchecked, 41.14ms Time], IncrementalHoareTripleChecker [22 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 1758.76ms Time] [2021-11-13 01:36:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2021-11-13 01:36:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 3837. [2021-11-13 01:36:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3837 states, 2900 states have (on average 1.3875862068965517) internal successors, (4024), 2942 states have internal predecessors, (4024), 690 states have call successors, (690), 229 states have call predecessors, (690), 246 states have return successors, (769), 689 states have call predecessors, (769), 689 states have call successors, (769) [2021-11-13 01:36:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 5483 transitions. [2021-11-13 01:36:52,384 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 5483 transitions. Word has length 139 [2021-11-13 01:36:52,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:52,387 INFO L470 AbstractCegarLoop]: Abstraction has 3837 states and 5483 transitions. [2021-11-13 01:36:52,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 7.214285714285714) internal successors, (101), 11 states have internal predecessors, (101), 4 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (16), 7 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 01:36:52,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 5483 transitions. [2021-11-13 01:36:52,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 01:36:52,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:52,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:52,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:52,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:52,626 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash 74518722, now seen corresponding path program 1 times [2021-11-13 01:36:52,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:52,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004578003] [2021-11-13 01:36:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:52,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:52,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:52,633 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:52,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:36:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:55,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1296 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:36:55,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 01:36:55,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:36:56,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:56,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004578003] [2021-11-13 01:36:56,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004578003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:56,328 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:56,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:36:56,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646334999] [2021-11-13 01:36:56,329 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:56,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:36:56,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:56,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:36:56,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:36:56,331 INFO L87 Difference]: Start difference. First operand 3837 states and 5483 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:36:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:56,897 INFO L93 Difference]: Finished difference Result 7931 states and 11425 transitions. [2021-11-13 01:36:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:36:56,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 145 [2021-11-13 01:36:56,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:56,938 INFO L225 Difference]: With dead ends: 7931 [2021-11-13 01:36:56,938 INFO L226 Difference]: Without dead ends: 4101 [2021-11-13 01:36:56,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:36:56,962 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 75 mSDsluCounter, 3698 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 310.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 4633 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.07ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 337.92ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:56,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 4633 Invalid, 25 Unknown, 0 Unchecked, 9.07ms Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 337.92ms Time] [2021-11-13 01:36:56,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-11-13 01:36:57,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3849. [2021-11-13 01:36:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 2912 states have (on average 1.385989010989011) internal successors, (4036), 2954 states have internal predecessors, (4036), 690 states have call successors, (690), 229 states have call predecessors, (690), 246 states have return successors, (769), 689 states have call predecessors, (769), 689 states have call successors, (769) [2021-11-13 01:36:57,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 5495 transitions. [2021-11-13 01:36:57,290 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 5495 transitions. Word has length 145 [2021-11-13 01:36:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:57,290 INFO L470 AbstractCegarLoop]: Abstraction has 3849 states and 5495 transitions. [2021-11-13 01:36:57,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:36:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 5495 transitions. [2021-11-13 01:36:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 01:36:57,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:57,312 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:57,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:57,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:57,537 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:57,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:57,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1141635004, now seen corresponding path program 1 times [2021-11-13 01:36:57,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:57,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600519551] [2021-11-13 01:36:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:57,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:57,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:57,542 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:57,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:36:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:59,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:36:59,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 01:37:00,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:37:01,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:01,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600519551] [2021-11-13 01:37:01,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600519551] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:01,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:01,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-13 01:37:01,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129727960] [2021-11-13 01:37:01,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:01,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:37:01,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:01,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:37:01,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:37:01,793 INFO L87 Difference]: Start difference. First operand 3849 states and 5495 transitions. Second operand has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-13 01:37:02,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:02,517 INFO L93 Difference]: Finished difference Result 7853 states and 11281 transitions. [2021-11-13 01:37:02,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:37:02,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 145 [2021-11-13 01:37:02,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:02,552 INFO L225 Difference]: With dead ends: 7853 [2021-11-13 01:37:02,552 INFO L226 Difference]: Without dead ends: 4011 [2021-11-13 01:37:02,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-13 01:37:02,574 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 82 mSDsluCounter, 4649 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 304.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 5597 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.38ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 347.13ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:02,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 5597 Invalid, 77 Unknown, 0 Unchecked, 12.38ms Time], IncrementalHoareTripleChecker [13 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 347.13ms Time] [2021-11-13 01:37:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4011 states. [2021-11-13 01:37:02,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4011 to 3873. [2021-11-13 01:37:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 2930 states have (on average 1.383617747440273) internal successors, (4054), 2972 states have internal predecessors, (4054), 696 states have call successors, (696), 229 states have call predecessors, (696), 246 states have return successors, (775), 695 states have call predecessors, (775), 695 states have call successors, (775) [2021-11-13 01:37:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 5525 transitions. [2021-11-13 01:37:02,821 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 5525 transitions. Word has length 145 [2021-11-13 01:37:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:02,823 INFO L470 AbstractCegarLoop]: Abstraction has 3873 states and 5525 transitions. [2021-11-13 01:37:02,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-13 01:37:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 5525 transitions. [2021-11-13 01:37:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 01:37:02,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:02,842 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:02,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:03,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:03,064 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:03,065 INFO L85 PathProgramCache]: Analyzing trace with hash -449827683, now seen corresponding path program 1 times [2021-11-13 01:37:03,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:03,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805343764] [2021-11-13 01:37:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:03,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:03,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:03,070 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:03,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:37:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:05,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:37:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 01:37:06,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:37:06,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:06,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805343764] [2021-11-13 01:37:06,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805343764] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:37:06,793 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:37:06,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 01:37:06,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581695888] [2021-11-13 01:37:06,794 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:06,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:37:06,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:06,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:37:06,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:37:06,796 INFO L87 Difference]: Start difference. First operand 3873 states and 5525 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-13 01:37:06,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:06,950 INFO L93 Difference]: Finished difference Result 5829 states and 8365 transitions. [2021-11-13 01:37:06,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:37:06,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 148 [2021-11-13 01:37:06,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:06,981 INFO L225 Difference]: With dead ends: 5829 [2021-11-13 01:37:06,981 INFO L226 Difference]: Without dead ends: 3885 [2021-11-13 01:37:06,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:37:06,993 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 5 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.69ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.04ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:06,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1842 Invalid, 4 Unknown, 0 Unchecked, 3.69ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 17.04ms Time] [2021-11-13 01:37:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-11-13 01:37:07,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3885. [2021-11-13 01:37:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 2939 states have (on average 1.382443007825791) internal successors, (4063), 2984 states have internal predecessors, (4063), 696 states have call successors, (696), 229 states have call predecessors, (696), 249 states have return successors, (781), 695 states have call predecessors, (781), 695 states have call successors, (781) [2021-11-13 01:37:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 5540 transitions. [2021-11-13 01:37:07,274 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 5540 transitions. Word has length 148 [2021-11-13 01:37:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:07,275 INFO L470 AbstractCegarLoop]: Abstraction has 3885 states and 5540 transitions. [2021-11-13 01:37:07,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-13 01:37:07,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 5540 transitions. [2021-11-13 01:37:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-13 01:37:07,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:07,294 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:07,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:07,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:07,516 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:07,517 INFO L85 PathProgramCache]: Analyzing trace with hash -482281090, now seen corresponding path program 1 times [2021-11-13 01:37:07,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:07,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996167053] [2021-11-13 01:37:07,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:07,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:07,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:07,521 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:07,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:37:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:10,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 01:37:10,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:37:11,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:37:12,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:12,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996167053] [2021-11-13 01:37:12,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996167053] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:12,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:12,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-13 01:37:12,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096786791] [2021-11-13 01:37:12,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:12,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:37:12,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:12,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:37:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:37:12,824 INFO L87 Difference]: Start difference. First operand 3885 states and 5540 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-13 01:37:14,915 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:16,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:20,358 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:22,361 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:29,552 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:31,574 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:33,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:40,738 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:42,747 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:44,752 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:49,211 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:51,337 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:53,353 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:55,364 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:58,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:58,344 INFO L93 Difference]: Finished difference Result 8189 states and 11734 transitions. [2021-11-13 01:37:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:37:58,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 150 [2021-11-13 01:37:58,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:58,371 INFO L225 Difference]: With dead ends: 8189 [2021-11-13 01:37:58,371 INFO L226 Difference]: Without dead ends: 4275 [2021-11-13 01:37:58,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:37:58,392 INFO L933 BasicCegarLoop]: 1102 mSDtfsCounter, 1474 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 2210 mSolverCounterSat, 158 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43200.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1550 SdHoareTripleChecker+Valid, 2615 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.81ms SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2210 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45045.54ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:58,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1550 Valid, 2615 Invalid, 2379 Unknown, 0 Unchecked, 34.81ms Time], IncrementalHoareTripleChecker [158 Valid, 2210 Invalid, 11 Unknown, 0 Unchecked, 45045.54ms Time] [2021-11-13 01:37:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2021-11-13 01:37:58,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 4080. [2021-11-13 01:37:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4080 states, 3080 states have (on average 1.3737012987012986) internal successors, (4231), 3131 states have internal predecessors, (4231), 732 states have call successors, (732), 229 states have call predecessors, (732), 267 states have return successors, (841), 743 states have call predecessors, (841), 731 states have call successors, (841) [2021-11-13 01:37:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4080 states to 4080 states and 5804 transitions. [2021-11-13 01:37:58,649 INFO L78 Accepts]: Start accepts. Automaton has 4080 states and 5804 transitions. Word has length 150 [2021-11-13 01:37:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:58,650 INFO L470 AbstractCegarLoop]: Abstraction has 4080 states and 5804 transitions. [2021-11-13 01:37:58,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-13 01:37:58,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4080 states and 5804 transitions. [2021-11-13 01:37:58,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-13 01:37:58,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:58,702 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:58,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:58,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:58,913 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:58,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:58,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1304011002, now seen corresponding path program 1 times [2021-11-13 01:37:58,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:58,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896256956] [2021-11-13 01:37:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:58,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:58,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:58,918 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:58,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:38:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:01,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:38:01,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:38:01,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:38:02,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:38:02,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896256956] [2021-11-13 01:38:02,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896256956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:38:02,715 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:38:02,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:38:02,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019914330] [2021-11-13 01:38:02,716 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:38:02,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:38:02,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:38:02,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:38:02,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:38:02,718 INFO L87 Difference]: Start difference. First operand 4080 states and 5804 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-13 01:38:03,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:38:03,056 INFO L93 Difference]: Finished difference Result 8189 states and 11725 transitions. [2021-11-13 01:38:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:38:03,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 160 [2021-11-13 01:38:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:38:03,094 INFO L225 Difference]: With dead ends: 8189 [2021-11-13 01:38:03,095 INFO L226 Difference]: Without dead ends: 4092 [2021-11-13 01:38:03,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:38:03,109 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 6 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1849 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.31ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.65ms IncrementalHoareTripleChecker+Time [2021-11-13 01:38:03,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 1849 Invalid, 10 Unknown, 0 Unchecked, 4.31ms Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 62.65ms Time] [2021-11-13 01:38:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2021-11-13 01:38:03,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 4092. [2021-11-13 01:38:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4092 states, 3092 states have (on average 1.3722509702457957) internal successors, (4243), 3143 states have internal predecessors, (4243), 732 states have call successors, (732), 229 states have call predecessors, (732), 267 states have return successors, (841), 743 states have call predecessors, (841), 731 states have call successors, (841) [2021-11-13 01:38:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4092 states to 4092 states and 5816 transitions. [2021-11-13 01:38:03,345 INFO L78 Accepts]: Start accepts. Automaton has 4092 states and 5816 transitions. Word has length 160 [2021-11-13 01:38:03,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:38:03,346 INFO L470 AbstractCegarLoop]: Abstraction has 4092 states and 5816 transitions. [2021-11-13 01:38:03,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-13 01:38:03,347 INFO L276 IsEmpty]: Start isEmpty. Operand 4092 states and 5816 transitions. [2021-11-13 01:38:03,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-13 01:38:03,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:38:03,365 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:38:03,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:38:03,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:38:03,590 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:38:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:38:03,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1729934682, now seen corresponding path program 1 times [2021-11-13 01:38:03,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:38:03,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192603602] [2021-11-13 01:38:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:38:03,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:38:03,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:38:03,593 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:38:03,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:38:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:06,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:38:06,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:38:06,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:38:07,639 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:38:07,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192603602] [2021-11-13 01:38:07,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192603602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:38:07,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [441737174] [2021-11-13 01:38:07,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:38:07,641 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:38:07,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:38:07,643 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:38:07,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-13 01:38:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:10,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:38:10,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:38:10,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:38:11,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [441737174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:38:11,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267010754] [2021-11-13 01:38:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:38:11,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:38:11,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:38:11,675 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:38:11,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 01:38:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:12,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:38:12,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:38:13,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:38:14,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267010754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:38:14,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:38:14,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-13 01:38:14,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528437238] [2021-11-13 01:38:14,333 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:38:14,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 01:38:14,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:38:14,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 01:38:14,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:38:14,336 INFO L87 Difference]: Start difference. First operand 4092 states and 5816 transitions. Second operand has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 2 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 01:38:15,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:38:15,443 INFO L93 Difference]: Finished difference Result 8225 states and 11773 transitions. [2021-11-13 01:38:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 01:38:15,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 2 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 162 [2021-11-13 01:38:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:38:15,466 INFO L225 Difference]: With dead ends: 8225 [2021-11-13 01:38:15,466 INFO L226 Difference]: Without dead ends: 4116 [2021-11-13 01:38:15,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 954 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:38:15,481 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 19 mSDsluCounter, 5530 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 260.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 6453 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.97ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 290.14ms IncrementalHoareTripleChecker+Time [2021-11-13 01:38:15,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 6453 Invalid, 55 Unknown, 0 Unchecked, 12.97ms Time], IncrementalHoareTripleChecker [10 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 290.14ms Time] [2021-11-13 01:38:15,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4116 states. [2021-11-13 01:38:15,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4116 to 4116. [2021-11-13 01:38:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 3116 states have (on average 1.3693838254172015) internal successors, (4267), 3167 states have internal predecessors, (4267), 732 states have call successors, (732), 229 states have call predecessors, (732), 267 states have return successors, (841), 743 states have call predecessors, (841), 731 states have call successors, (841) [2021-11-13 01:38:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 5840 transitions. [2021-11-13 01:38:15,765 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 5840 transitions. Word has length 162 [2021-11-13 01:38:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:38:15,766 INFO L470 AbstractCegarLoop]: Abstraction has 4116 states and 5840 transitions. [2021-11-13 01:38:15,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 2 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 01:38:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 5840 transitions. [2021-11-13 01:38:15,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-13 01:38:15,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:38:15,789 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:38:15,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-13 01:38:16,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:38:16,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:38:16,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:38:16,403 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:38:16,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:38:16,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2096228838, now seen corresponding path program 2 times [2021-11-13 01:38:16,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:38:16,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690801100] [2021-11-13 01:38:16,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:38:16,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:38:16,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:38:16,406 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:38:16,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:38:49,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:38:49,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:38:49,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:38:49,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:38:50,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:38:51,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:38:51,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690801100] [2021-11-13 01:38:51,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690801100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:38:51,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [603184943] [2021-11-13 01:38:51,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:38:51,658 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:38:51,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:38:51,671 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:38:51,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 01:40:06,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:40:06,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:40:07,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:40:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:40:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:40:07,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:40:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:40:08,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [603184943] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:40:08,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892433208] [2021-11-13 01:40:08,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:40:08,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:40:08,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:40:08,937 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:40:08,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 01:40:54,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:40:54,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:40:54,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:40:54,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:40:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:40:55,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:40:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:40:57,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892433208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:40:57,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:40:57,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 26 [2021-11-13 01:40:57,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995519887] [2021-11-13 01:40:57,146 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:40:57,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 01:40:57,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:40:57,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 01:40:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-13 01:40:57,149 INFO L87 Difference]: Start difference. First operand 4116 states and 5840 transitions. Second operand has 26 states, 26 states have (on average 5.3076923076923075) internal successors, (138), 26 states have internal predecessors, (138), 2 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 01:41:00,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:00,366 INFO L93 Difference]: Finished difference Result 8297 states and 11869 transitions. [2021-11-13 01:41:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 01:41:00,367 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.3076923076923075) internal successors, (138), 26 states have internal predecessors, (138), 2 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 166 [2021-11-13 01:41:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:00,387 INFO L225 Difference]: With dead ends: 8297 [2021-11-13 01:41:00,387 INFO L226 Difference]: Without dead ends: 4164 [2021-11-13 01:41:00,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 966 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 01:41:00,401 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 57 mSDsluCounter, 11978 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 598.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 12901 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.42ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 746.16ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:00,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 12901 Invalid, 159 Unknown, 0 Unchecked, 22.42ms Time], IncrementalHoareTripleChecker [41 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 746.16ms Time] [2021-11-13 01:41:00,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2021-11-13 01:41:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 4164. [2021-11-13 01:41:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4164 states, 3164 states have (on average 1.36378002528445) internal successors, (4315), 3215 states have internal predecessors, (4315), 732 states have call successors, (732), 229 states have call predecessors, (732), 267 states have return successors, (841), 743 states have call predecessors, (841), 731 states have call successors, (841) [2021-11-13 01:41:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4164 states to 4164 states and 5888 transitions. [2021-11-13 01:41:00,675 INFO L78 Accepts]: Start accepts. Automaton has 4164 states and 5888 transitions. Word has length 166 [2021-11-13 01:41:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:00,676 INFO L470 AbstractCegarLoop]: Abstraction has 4164 states and 5888 transitions. [2021-11-13 01:41:00,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.3076923076923075) internal successors, (138), 26 states have internal predecessors, (138), 2 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 01:41:00,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4164 states and 5888 transitions. [2021-11-13 01:41:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-13 01:41:00,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:00,697 INFO L514 BasicCegarLoop]: trace histogram [14, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:00,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:00,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:01,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:01,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:01,319 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:01,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:01,320 INFO L85 PathProgramCache]: Analyzing trace with hash -163952538, now seen corresponding path program 3 times [2021-11-13 01:41:01,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:01,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986475147] [2021-11-13 01:41:01,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:41:01,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:01,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:01,323 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:01,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:41:22,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 01:41:22,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:41:22,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 01:41:22,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-13 01:41:23,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-13 01:41:24,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:24,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986475147] [2021-11-13 01:41:24,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986475147] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:24,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:24,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 14 [2021-11-13 01:41:24,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229562439] [2021-11-13 01:41:24,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:24,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 01:41:24,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:24,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 01:41:24,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:41:24,972 INFO L87 Difference]: Start difference. First operand 4164 states and 5888 transitions. Second operand has 10 states, 9 states have (on average 12.666666666666666) internal successors, (114), 8 states have internal predecessors, (114), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-13 01:41:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:27,109 INFO L93 Difference]: Finished difference Result 8441 states and 12025 transitions. [2021-11-13 01:41:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:41:27,110 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 12.666666666666666) internal successors, (114), 8 states have internal predecessors, (114), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 174 [2021-11-13 01:41:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:27,126 INFO L225 Difference]: With dead ends: 8441 [2021-11-13 01:41:27,126 INFO L226 Difference]: Without dead ends: 4284 [2021-11-13 01:41:27,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 333 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:41:27,136 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 181 mSDsluCounter, 7270 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 985.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 8196 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.76ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1080.49ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:27,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 8196 Invalid, 155 Unknown, 0 Unchecked, 11.76ms Time], IncrementalHoareTripleChecker [31 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 1080.49ms Time] [2021-11-13 01:41:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2021-11-13 01:41:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 4158. [2021-11-13 01:41:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 3158 states have (on average 1.3616212792906903) internal successors, (4300), 3209 states have internal predecessors, (4300), 732 states have call successors, (732), 229 states have call predecessors, (732), 267 states have return successors, (841), 743 states have call predecessors, (841), 731 states have call successors, (841) [2021-11-13 01:41:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 5873 transitions. [2021-11-13 01:41:27,354 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 5873 transitions. Word has length 174 [2021-11-13 01:41:27,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:27,355 INFO L470 AbstractCegarLoop]: Abstraction has 4158 states and 5873 transitions. [2021-11-13 01:41:27,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 12.666666666666666) internal successors, (114), 8 states have internal predecessors, (114), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-13 01:41:27,355 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 5873 transitions. [2021-11-13 01:41:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-13 01:41:27,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:27,372 INFO L514 BasicCegarLoop]: trace histogram [14, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:27,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:27,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:27,573 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:27,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:27,573 INFO L85 PathProgramCache]: Analyzing trace with hash -645032796, now seen corresponding path program 1 times [2021-11-13 01:41:27,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:27,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904557453] [2021-11-13 01:41:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:27,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:27,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:27,576 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:27,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 01:41:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:29,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 1445 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:41:29,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 22 proven. 105 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:41:31,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:41:34,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:34,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904557453] [2021-11-13 01:41:34,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904557453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:41:34,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1666720877] [2021-11-13 01:41:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:34,493 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:41:34,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:41:34,494 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:41:34,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-13 01:41:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:36,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1445 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:41:36,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 22 proven. 105 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:41:37,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:41:38,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1666720877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:41:38,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466340377] [2021-11-13 01:41:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:38,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:41:38,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:41:38,436 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:41:38,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 01:41:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:39,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1445 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-13 01:41:39,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-13 01:41:42,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 01:41:49,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466340377] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:41:49,814 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 01:41:49,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16, 16] imperfect sequences [18, 18, 18, 18] total 62 [2021-11-13 01:41:49,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906231448] [2021-11-13 01:41:49,815 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:49,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-13 01:41:49,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:49,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-13 01:41:49,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3482, Unknown=0, NotChecked=0, Total=3782 [2021-11-13 01:41:49,819 INFO L87 Difference]: Start difference. First operand 4158 states and 5873 transitions. Second operand has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 24 states have internal predecessors, (139), 8 states have call successors, (31), 2 states have call predecessors, (31), 8 states have return successors, (33), 14 states have call predecessors, (33), 8 states have call successors, (33) [2021-11-13 01:41:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:54,815 INFO L93 Difference]: Finished difference Result 8657 states and 12331 transitions. [2021-11-13 01:41:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 01:41:54,816 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 24 states have internal predecessors, (139), 8 states have call successors, (31), 2 states have call predecessors, (31), 8 states have return successors, (33), 14 states have call predecessors, (33), 8 states have call successors, (33) Word has length 174 [2021-11-13 01:41:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:54,831 INFO L225 Difference]: With dead ends: 8657 [2021-11-13 01:41:54,831 INFO L226 Difference]: Without dead ends: 4506 [2021-11-13 01:41:54,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 979 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=363, Invalid=4329, Unknown=0, NotChecked=0, Total=4692 [2021-11-13 01:41:54,843 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 274 mSDsluCounter, 20093 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2951.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 21049 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.00ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3227.05ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:54,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 21049 Invalid, 326 Unknown, 0 Unchecked, 28.00ms Time], IncrementalHoareTripleChecker [37 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 3227.05ms Time] [2021-11-13 01:41:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-11-13 01:41:55,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 4236. [2021-11-13 01:41:55,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4236 states, 3206 states have (on average 1.3552713661883968) internal successors, (4345), 3257 states have internal predecessors, (4345), 762 states have call successors, (762), 229 states have call predecessors, (762), 267 states have return successors, (871), 773 states have call predecessors, (871), 761 states have call successors, (871) [2021-11-13 01:41:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4236 states to 4236 states and 5978 transitions. [2021-11-13 01:41:55,106 INFO L78 Accepts]: Start accepts. Automaton has 4236 states and 5978 transitions. Word has length 174 [2021-11-13 01:41:55,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:55,106 INFO L470 AbstractCegarLoop]: Abstraction has 4236 states and 5978 transitions. [2021-11-13 01:41:55,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 24 states have internal predecessors, (139), 8 states have call successors, (31), 2 states have call predecessors, (31), 8 states have return successors, (33), 14 states have call predecessors, (33), 8 states have call successors, (33) [2021-11-13 01:41:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4236 states and 5978 transitions. [2021-11-13 01:41:55,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-13 01:41:55,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:55,129 INFO L514 BasicCegarLoop]: trace histogram [14, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:55,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:55,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-13 01:41:55,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-13 01:41:55,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:41:55,754 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:55,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:55,754 INFO L85 PathProgramCache]: Analyzing trace with hash -35360451, now seen corresponding path program 1 times [2021-11-13 01:41:55,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:55,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409258669] [2021-11-13 01:41:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:55,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:55,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:55,757 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:55,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 01:41:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:58,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:41:58,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 22 proven. 105 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:41:59,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:42:02,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:42:02,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409258669] [2021-11-13 01:42:02,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409258669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:42:02,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [301167221] [2021-11-13 01:42:02,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:42:02,464 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:42:02,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:42:02,465 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:42:02,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-13 01:42:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:42:04,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:42:04,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 22 proven. 105 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:42:05,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:42:06,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [301167221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:42:06,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229115952] [2021-11-13 01:42:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:42:06,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:42:06,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:42:06,611 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:42:06,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 01:42:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:42:07,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 01:42:07,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-13 01:42:09,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-13 01:42:13,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229115952] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:42:13,007 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 01:42:13,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [18, 18, 18, 18] total 48 [2021-11-13 01:42:13,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744561411] [2021-11-13 01:42:13,008 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:42:13,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 01:42:13,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:42:13,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 01:42:13,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1972, Unknown=0, NotChecked=0, Total=2256 [2021-11-13 01:42:13,011 INFO L87 Difference]: Start difference. First operand 4236 states and 5978 transitions. Second operand has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 11 states have call successors, (43), 6 states have call predecessors, (43), 10 states have return successors, (42), 10 states have call predecessors, (42), 10 states have call successors, (42) [2021-11-13 01:42:15,123 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:17,134 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:19,137 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:21,152 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:22,580 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:23,690 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:27,197 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:29,208 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:31,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:38,888 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:40,901 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:42,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:54,202 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:56,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:57,816 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:59,764 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:04,669 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:06,675 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:08,676 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:10,680 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:12,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:14,688 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:16,693 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:18,697 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:29,196 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:31,211 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:33,228 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:35,235 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:37,250 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:39,266 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:41,276 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:43,295 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:59,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:43:59,034 INFO L93 Difference]: Finished difference Result 11637 states and 17436 transitions. [2021-11-13 01:43:59,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 01:43:59,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 11 states have call successors, (43), 6 states have call predecessors, (43), 10 states have return successors, (42), 10 states have call predecessors, (42), 10 states have call successors, (42) Word has length 188 [2021-11-13 01:43:59,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:43:59,082 INFO L225 Difference]: With dead ends: 11637 [2021-11-13 01:43:59,083 INFO L226 Difference]: Without dead ends: 9171 [2021-11-13 01:43:59,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1139 GetRequests, 1079 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=439, Invalid=3343, Unknown=0, NotChecked=0, Total=3782 [2021-11-13 01:43:59,098 INFO L933 BasicCegarLoop]: 1443 mSDtfsCounter, 6927 mSDsluCounter, 5117 mSDsCounter, 0 mSdLazyCounter, 7633 mSolverCounterSat, 2929 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98979.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7006 SdHoareTripleChecker+Valid, 6560 SdHoareTripleChecker+Invalid, 10588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 103.31ms SdHoareTripleChecker+Time, 2929 IncrementalHoareTripleChecker+Valid, 7633 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102849.99ms IncrementalHoareTripleChecker+Time [2021-11-13 01:43:59,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7006 Valid, 6560 Invalid, 10588 Unknown, 0 Unchecked, 103.31ms Time], IncrementalHoareTripleChecker [2929 Valid, 7633 Invalid, 26 Unknown, 0 Unchecked, 102849.99ms Time] [2021-11-13 01:43:59,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9171 states. [2021-11-13 01:43:59,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9171 to 7181. [2021-11-13 01:43:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7181 states, 5387 states have (on average 1.3304250974568406) internal successors, (7167), 5462 states have internal predecessors, (7167), 1337 states have call successors, (1337), 385 states have call predecessors, (1337), 456 states have return successors, (1622), 1369 states have call predecessors, (1622), 1336 states have call successors, (1622) [2021-11-13 01:43:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7181 states to 7181 states and 10126 transitions. [2021-11-13 01:43:59,783 INFO L78 Accepts]: Start accepts. Automaton has 7181 states and 10126 transitions. Word has length 188 [2021-11-13 01:43:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:43:59,784 INFO L470 AbstractCegarLoop]: Abstraction has 7181 states and 10126 transitions. [2021-11-13 01:43:59,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 11 states have call successors, (43), 6 states have call predecessors, (43), 10 states have return successors, (42), 10 states have call predecessors, (42), 10 states have call successors, (42) [2021-11-13 01:43:59,784 INFO L276 IsEmpty]: Start isEmpty. Operand 7181 states and 10126 transitions. [2021-11-13 01:43:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-13 01:43:59,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:43:59,801 INFO L514 BasicCegarLoop]: trace histogram [14, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:43:59,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 01:44:00,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-13 01:44:00,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-13 01:44:00,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:44:00,415 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:44:00,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:44:00,415 INFO L85 PathProgramCache]: Analyzing trace with hash -924341188, now seen corresponding path program 1 times [2021-11-13 01:44:00,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:44:00,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730098628] [2021-11-13 01:44:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:44:00,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:44:00,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:44:00,418 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:44:00,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 01:44:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:44:03,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 1500 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:44:03,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 22 proven. 105 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:44:04,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:44:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:44:08,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:44:08,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730098628] [2021-11-13 01:44:08,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730098628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:44:08,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [409247651] [2021-11-13 01:44:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:44:08,320 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:44:08,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:44:08,328 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:44:08,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-13 01:44:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:44:09,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 1500 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:44:09,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-13 01:44:10,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:44:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-13 01:44:10,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [409247651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:44:10,953 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:44:10,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [18, 18] total 38 [2021-11-13 01:44:10,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724789140] [2021-11-13 01:44:10,954 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:44:10,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:44:10,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:44:10,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:44:10,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 01:44:10,956 INFO L87 Difference]: Start difference. First operand 7181 states and 10126 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-13 01:44:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:44:11,795 INFO L93 Difference]: Finished difference Result 12430 states and 17678 transitions. [2021-11-13 01:44:11,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:44:11,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 190 [2021-11-13 01:44:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:44:11,825 INFO L225 Difference]: With dead ends: 12430 [2021-11-13 01:44:11,825 INFO L226 Difference]: Without dead ends: 7250 [2021-11-13 01:44:11,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=258, Invalid=1382, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 01:44:11,843 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 29 mSDsluCounter, 3673 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 4593 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.39ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 173.73ms IncrementalHoareTripleChecker+Time [2021-11-13 01:44:11,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 4593 Invalid, 48 Unknown, 0 Unchecked, 5.39ms Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 173.73ms Time] [2021-11-13 01:44:11,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7250 states. [2021-11-13 01:44:12,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7250 to 7202. [2021-11-13 01:44:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7202 states, 5408 states have (on average 1.3308062130177514) internal successors, (7197), 5483 states have internal predecessors, (7197), 1337 states have call successors, (1337), 385 states have call predecessors, (1337), 456 states have return successors, (1622), 1369 states have call predecessors, (1622), 1336 states have call successors, (1622) [2021-11-13 01:44:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7202 states to 7202 states and 10156 transitions. [2021-11-13 01:44:12,382 INFO L78 Accepts]: Start accepts. Automaton has 7202 states and 10156 transitions. Word has length 190 [2021-11-13 01:44:12,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:44:12,383 INFO L470 AbstractCegarLoop]: Abstraction has 7202 states and 10156 transitions. [2021-11-13 01:44:12,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-13 01:44:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 7202 states and 10156 transitions. [2021-11-13 01:44:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-13 01:44:12,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:44:12,395 INFO L514 BasicCegarLoop]: trace histogram [14, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:44:12,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 01:44:12,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-13 01:44:12,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:44:12,817 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:44:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:44:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash 111190677, now seen corresponding path program 1 times [2021-11-13 01:44:12,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:44:12,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583780403] [2021-11-13 01:44:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:44:12,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:44:12,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:44:12,821 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:44:12,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 01:44:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:44:15,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:44:15,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 22 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:44:16,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:44:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 01:44:20,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:44:20,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583780403] [2021-11-13 01:44:20,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583780403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:44:20,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [630202143] [2021-11-13 01:44:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:44:20,626 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:44:20,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:44:20,627 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:44:20,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-13 01:44:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:44:23,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:44:23,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 22 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:44:23,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:44:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 01:44:25,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [630202143] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:44:25,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457361692] [2021-11-13 01:44:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:44:25,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:44:25,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:44:25,458 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:44:25,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-13 01:44:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:44:26,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 01:44:26,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 22 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:44:27,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:44:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 01:44:32,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457361692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:44:32,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:44:32,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 50 [2021-11-13 01:44:32,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538610366] [2021-11-13 01:44:32,747 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:44:32,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-13 01:44:32,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:44:32,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-13 01:44:32,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=1811, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 01:44:32,750 INFO L87 Difference]: Start difference. First operand 7202 states and 10156 transitions. Second operand has 50 states, 50 states have (on average 3.72) internal successors, (186), 50 states have internal predecessors, (186), 2 states have call successors, (29), 2 states have call predecessors, (29), 5 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-13 01:44:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:44:48,557 INFO L93 Difference]: Finished difference Result 14637 states and 20945 transitions. [2021-11-13 01:44:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-13 01:44:48,559 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.72) internal successors, (186), 50 states have internal predecessors, (186), 2 states have call successors, (29), 2 states have call predecessors, (29), 5 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 192 [2021-11-13 01:44:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:44:48,646 INFO L225 Difference]: With dead ends: 14637 [2021-11-13 01:44:48,647 INFO L226 Difference]: Without dead ends: 7394 [2021-11-13 01:44:48,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1162 GetRequests, 1098 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1166, Invalid=3124, Unknown=0, NotChecked=0, Total=4290 [2021-11-13 01:44:48,698 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 167 mSDsluCounter, 13834 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1797.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 14757 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.72ms SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2001.96ms IncrementalHoareTripleChecker+Time [2021-11-13 01:44:48,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 14757 Invalid, 515 Unknown, 0 Unchecked, 17.72ms Time], IncrementalHoareTripleChecker [208 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 2001.96ms Time] [2021-11-13 01:44:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7394 states. [2021-11-13 01:44:49,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7394 to 7394. [2021-11-13 01:44:49,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7394 states, 5600 states have (on average 1.3216071428571428) internal successors, (7401), 5675 states have internal predecessors, (7401), 1337 states have call successors, (1337), 385 states have call predecessors, (1337), 456 states have return successors, (1622), 1369 states have call predecessors, (1622), 1336 states have call successors, (1622) [2021-11-13 01:44:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 10360 transitions. [2021-11-13 01:44:49,444 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 10360 transitions. Word has length 192 [2021-11-13 01:44:49,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:44:49,445 INFO L470 AbstractCegarLoop]: Abstraction has 7394 states and 10360 transitions. [2021-11-13 01:44:49,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.72) internal successors, (186), 50 states have internal predecessors, (186), 2 states have call successors, (29), 2 states have call predecessors, (29), 5 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-13 01:44:49,445 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 10360 transitions. [2021-11-13 01:44:49,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-13 01:44:49,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:44:49,457 INFO L514 BasicCegarLoop]: trace histogram [16, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:44:49,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-13 01:44:49,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-13 01:44:49,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-13 01:44:50,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:44:50,072 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:44:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:44:50,073 INFO L85 PathProgramCache]: Analyzing trace with hash 765922869, now seen corresponding path program 2 times [2021-11-13 01:44:50,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:44:50,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610226265] [2021-11-13 01:44:50,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:44:50,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:44:50,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:44:50,079 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:44:50,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f70bc1-95c3-418f-9b12-603baaf6e020/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process