./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--arcnet--rfc1201.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/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--arcnet--rfc1201.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH --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 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:46:13,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:46:13,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:46:13,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:46:13,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:46:13,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:46:13,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:46:13,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:46:13,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:46:13,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:46:13,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:46:13,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:46:13,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:46:13,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:46:13,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:46:13,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:46:13,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:46:13,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:46:13,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:46:13,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:46:13,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:46:13,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:46:13,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:46:13,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:46:13,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:46:13,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:46:13,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:46:13,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:46:13,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:46:13,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:46:13,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:46:13,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:46:13,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:46:13,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:46:13,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:46:13,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:46:13,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:46:13,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:46:13,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:46:13,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:46:13,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:46:13,854 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 05:46:13,894 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:46:13,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:46:13,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:46:13,896 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:46:13,896 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:46:13,897 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:46:13,897 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:46:13,897 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:46:13,897 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:46:13,897 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:46:13,904 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:46:13,904 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:46:13,905 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:46:13,905 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:46:13,905 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:46:13,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:46:13,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:46:13,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:46:13,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:46:13,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:46:13,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:46:13,907 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:46:13,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:46:13,907 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:46:13,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:46:13,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:46:13,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:46:13,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:46:13,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:46:13,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:46:13,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:46:13,911 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:46:13,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:46:13,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:46:13,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:46:13,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:46:13,912 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_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 [2021-11-03 05:46:14,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:46:14,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:46:14,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:46:14,223 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:46:14,224 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:46:14,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-03 05:46:14,341 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/data/8315b986a/4472234cd95746f19b482fbb3db86c87/FLAGde075eb3c [2021-11-03 05:46:15,121 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:46:15,122 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-03 05:46:15,175 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/data/8315b986a/4472234cd95746f19b482fbb3db86c87/FLAGde075eb3c [2021-11-03 05:46:15,664 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/data/8315b986a/4472234cd95746f19b482fbb3db86c87 [2021-11-03 05:46:15,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:46:15,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:46:15,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:46:15,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:46:15,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:46:15,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:46:15" (1/1) ... [2021-11-03 05:46:15,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dcb4f6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:15, skipping insertion in model container [2021-11-03 05:46:15,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:46:15" (1/1) ... [2021-11-03 05:46:15,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:46:15,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:46:16,465 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_deaf6bf3-640b-4ecf-9123-add576a5bca4/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-11-03 05:46:16,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:46:16,809 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) [2021-11-03 05:46:16,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3765c707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:16, skipping insertion in model container [2021-11-03 05:46:16,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:46:16,811 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:46:16,813 INFO L168 Benchmark]: Toolchain (without parser) took 1142.19 ms. Allocated memory was 104.9 MB in the beginning and 138.4 MB in the end (delta: 33.6 MB). Free memory was 63.8 MB in the beginning and 104.1 MB in the end (delta: -40.3 MB). Peak memory consumption was 33.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:46:16,814 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 104.9 MB. Free memory is still 58.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:46:16,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1139.70 ms. Allocated memory was 104.9 MB in the beginning and 138.4 MB in the end (delta: 33.6 MB). Free memory was 63.7 MB in the beginning and 104.1 MB in the end (delta: -40.4 MB). Peak memory consumption was 33.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:46:16,817 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 104.9 MB. Free memory is still 58.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1139.70 ms. Allocated memory was 104.9 MB in the beginning and 138.4 MB in the end (delta: 33.6 MB). Free memory was 63.7 MB in the beginning and 104.1 MB in the end (delta: -40.4 MB). Peak memory consumption was 33.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5302]: 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_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/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--arcnet--rfc1201.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH --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 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:46:19,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:46:19,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:46:19,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:46:19,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:46:19,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:46:19,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:46:19,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:46:19,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:46:19,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:46:19,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:46:19,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:46:19,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:46:19,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:46:19,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:46:19,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:46:19,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:46:19,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:46:19,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:46:19,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:46:19,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:46:19,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:46:19,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:46:19,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:46:19,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:46:19,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:46:19,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:46:19,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:46:19,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:46:19,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:46:19,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:46:19,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:46:19,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:46:19,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:46:19,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:46:19,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:46:19,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:46:19,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:46:19,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:46:19,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:46:19,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:46:19,175 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 05:46:19,219 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:46:19,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:46:19,220 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:46:19,220 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:46:19,221 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:46:19,221 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:46:19,221 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:46:19,221 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:46:19,222 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:46:19,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:46:19,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:46:19,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:46:19,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:46:19,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:46:19,225 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:46:19,225 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:46:19,225 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:46:19,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:46:19,226 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:46:19,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:46:19,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:46:19,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:46:19,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:46:19,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:46:19,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:46:19,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:46:19,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:46:19,227 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:46:19,227 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:46:19,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:46:19,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:46:19,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:46:19,228 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_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 [2021-11-03 05:46:19,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:46:19,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:46:19,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:46:19,633 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:46:19,633 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:46:19,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-03 05:46:19,710 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/data/59fae63c1/b3a8458008794e7897c8795b56c2042b/FLAG43993744b [2021-11-03 05:46:20,574 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:46:20,575 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-03 05:46:20,622 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/data/59fae63c1/b3a8458008794e7897c8795b56c2042b/FLAG43993744b [2021-11-03 05:46:21,119 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/data/59fae63c1/b3a8458008794e7897c8795b56c2042b [2021-11-03 05:46:21,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:46:21,123 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:46:21,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:46:21,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:46:21,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:46:21,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:46:21" (1/1) ... [2021-11-03 05:46:21,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cce3b82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:21, skipping insertion in model container [2021-11-03 05:46:21,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:46:21" (1/1) ... [2021-11-03 05:46:21,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:46:21,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:46:22,019 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_deaf6bf3-640b-4ecf-9123-add576a5bca4/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-11-03 05:46:22,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:46:22,452 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:46:22,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:46:22,638 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_deaf6bf3-640b-4ecf-9123-add576a5bca4/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-11-03 05:46:22,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:46:22,762 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:46:22,978 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_deaf6bf3-640b-4ecf-9123-add576a5bca4/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-11-03 05:46:23,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:46:23,111 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:46:23,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:23 WrapperNode [2021-11-03 05:46:23,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:46:23,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:46:23,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:46:23,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:46:23,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:23" (1/1) ... [2021-11-03 05:46:23,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:23" (1/1) ... [2021-11-03 05:46:23,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:46:23,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:46:23,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:46:23,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:46:23,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:23" (1/1) ... [2021-11-03 05:46:23,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:23" (1/1) ... [2021-11-03 05:46:23,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:23" (1/1) ... [2021-11-03 05:46:23,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:23" (1/1) ... [2021-11-03 05:46:23,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:23" (1/1) ... [2021-11-03 05:46:23,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:23" (1/1) ... [2021-11-03 05:46:23,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:23" (1/1) ... [2021-11-03 05:46:23,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:46:23,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:46:23,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:46:23,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:46:23,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:23" (1/1) ... [2021-11-03 05:46:23,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:46:23,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:46:23,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:46:23,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:46:23,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:46:23,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-03 05:46:23,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:46:23,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-03 05:46:23,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-03 05:46:23,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-03 05:46:23,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-03 05:46:23,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-03 05:46:23,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-03 05:46:23,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-03 05:46:23,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:46:23,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:46:23,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:46:23,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-03 05:46:23,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-03 05:46:23,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-03 05:46:23,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:46:23,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-03 05:46:23,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-03 05:46:23,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-03 05:46:23,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:46:23,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:46:23,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 05:46:23,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:46:23,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-03 05:46:23,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-03 05:46:23,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:46:23,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:46:50,995 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:46:51,001 INFO L299 CfgBuilder]: Removed 198 assume(true) statements. [2021-11-03 05:46:51,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:46:51 BoogieIcfgContainer [2021-11-03 05:46:51,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:46:51,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:46:51,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:46:51,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:46:51,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:46:21" (1/3) ... [2021-11-03 05:46:51,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71f2c026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:46:51, skipping insertion in model container [2021-11-03 05:46:51,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:23" (2/3) ... [2021-11-03 05:46:51,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71f2c026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:46:51, skipping insertion in model container [2021-11-03 05:46:51,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:46:51" (3/3) ... [2021-11-03 05:46:51,017 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-03 05:46:51,023 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:46:51,023 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:46:51,086 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:46:51,093 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 [2021-11-03 05:46:51,093 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:46:51,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 296 states, 294 states have (on average 1.5374149659863945) internal successors, (452), 295 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 05:46:51,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:46:51,129 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:46:51,130 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:46:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:46:51,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1448866139, now seen corresponding path program 1 times [2021-11-03 05:46:51,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:46:51,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222230291] [2021-11-03 05:46:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:46:51,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:46:51,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:46:51,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:46:51,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:46:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:46:51,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:46:51,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:51,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:46:51,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:46:51,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222230291] [2021-11-03 05:46:51,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222230291] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:46:51,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:46:51,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:46:51,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440970486] [2021-11-03 05:46:51,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:46:51,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:46:51,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:46:51,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:46:51,867 INFO L87 Difference]: Start difference. First operand has 296 states, 294 states have (on average 1.5374149659863945) internal successors, (452), 295 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:46:51,973 INFO L93 Difference]: Finished difference Result 588 states and 899 transitions. [2021-11-03 05:46:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:46:51,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 05:46:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:46:51,989 INFO L225 Difference]: With dead ends: 588 [2021-11-03 05:46:51,989 INFO L226 Difference]: Without dead ends: 290 [2021-11-03 05:46:51,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:46:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-03 05:46:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-11-03 05:46:52,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.453287197231834) internal successors, (420), 289 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 420 transitions. [2021-11-03 05:46:52,083 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 420 transitions. Word has length 18 [2021-11-03 05:46:52,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:46:52,083 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 420 transitions. [2021-11-03 05:46:52,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:52,084 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 420 transitions. [2021-11-03 05:46:52,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-03 05:46:52,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:46:52,085 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:46:52,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 05:46:52,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:46:52,286 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:46:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:46:52,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1211009814, now seen corresponding path program 1 times [2021-11-03 05:46:52,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:46:52,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999444622] [2021-11-03 05:46:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:46:52,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:46:52,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:46:52,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:46:52,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:46:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:46:52,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:46:52,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:46:52,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:46:52,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:46:52,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999444622] [2021-11-03 05:46:52,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999444622] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:46:52,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:46:52,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:46:52,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667496201] [2021-11-03 05:46:52,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:46:52,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:46:52,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:46:52,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:46:52,914 INFO L87 Difference]: Start difference. First operand 290 states and 420 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:46:55,131 INFO L93 Difference]: Finished difference Result 1086 states and 1593 transitions. [2021-11-03 05:46:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:46:55,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-03 05:46:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:46:55,143 INFO L225 Difference]: With dead ends: 1086 [2021-11-03 05:46:55,143 INFO L226 Difference]: Without dead ends: 807 [2021-11-03 05:46:55,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:46:55,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-11-03 05:46:55,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2021-11-03 05:46:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.466501240694789) internal successors, (1182), 806 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1182 transitions. [2021-11-03 05:46:55,213 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1182 transitions. Word has length 19 [2021-11-03 05:46:55,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:46:55,214 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1182 transitions. [2021-11-03 05:46:55,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:55,214 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1182 transitions. [2021-11-03 05:46:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-03 05:46:55,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:46:55,216 INFO L513 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] [2021-11-03 05:46:55,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:46:55,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:46:55,431 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:46:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:46:55,432 INFO L85 PathProgramCache]: Analyzing trace with hash 72115822, now seen corresponding path program 1 times [2021-11-03 05:46:55,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:46:55,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575873489] [2021-11-03 05:46:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:46:55,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:46:55,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:46:55,441 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:46:55,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:46:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:46:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:46:55,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:46:55,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:46:55,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:46:55,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575873489] [2021-11-03 05:46:55,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575873489] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:46:55,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:46:55,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:46:55,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439492602] [2021-11-03 05:46:55,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:46:55,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:46:55,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:46:55,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:46:55,981 INFO L87 Difference]: Start difference. First operand 807 states and 1182 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:56,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:46:56,195 INFO L93 Difference]: Finished difference Result 1602 states and 2349 transitions. [2021-11-03 05:46:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:46:56,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-03 05:46:56,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:46:56,205 INFO L225 Difference]: With dead ends: 1602 [2021-11-03 05:46:56,205 INFO L226 Difference]: Without dead ends: 806 [2021-11-03 05:46:56,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:46:56,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-11-03 05:46:56,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2021-11-03 05:46:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 1.4633540372670808) internal successors, (1178), 805 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1178 transitions. [2021-11-03 05:46:56,242 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1178 transitions. Word has length 24 [2021-11-03 05:46:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:46:56,242 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1178 transitions. [2021-11-03 05:46:56,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1178 transitions. [2021-11-03 05:46:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-03 05:46:56,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:46:56,246 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:46:56,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:46:56,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:46:56,465 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:46:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:46:56,466 INFO L85 PathProgramCache]: Analyzing trace with hash -479932233, now seen corresponding path program 1 times [2021-11-03 05:46:56,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:46:56,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397861016] [2021-11-03 05:46:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:46:56,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:46:56,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:46:56,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:46:56,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:46:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:46:56,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:46:56,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 05:46:57,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 05:46:57,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:46:57,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397861016] [2021-11-03 05:46:57,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397861016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:46:57,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:46:57,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-03 05:46:57,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475419679] [2021-11-03 05:46:57,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:46:57,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:46:57,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:46:57,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:46:57,336 INFO L87 Difference]: Start difference. First operand 806 states and 1178 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:57,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:46:57,691 INFO L93 Difference]: Finished difference Result 2394 states and 3507 transitions. [2021-11-03 05:46:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:46:57,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-03 05:46:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:46:57,701 INFO L225 Difference]: With dead ends: 2394 [2021-11-03 05:46:57,702 INFO L226 Difference]: Without dead ends: 1595 [2021-11-03 05:46:57,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:46:57,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-11-03 05:46:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1571. [2021-11-03 05:46:57,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 1.4656050955414013) internal successors, (2301), 1570 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2301 transitions. [2021-11-03 05:46:57,765 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2301 transitions. Word has length 35 [2021-11-03 05:46:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:46:57,765 INFO L470 AbstractCegarLoop]: Abstraction has 1571 states and 2301 transitions. [2021-11-03 05:46:57,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2301 transitions. [2021-11-03 05:46:57,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 05:46:57,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:46:57,771 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:46:57,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:46:57,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:46:57,986 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:46:57,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:46:57,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1842743390, now seen corresponding path program 1 times [2021-11-03 05:46:57,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:46:57,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271261817] [2021-11-03 05:46:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:46:57,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:46:57,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:46:57,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:46:57,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:46:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:46:58,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:46:58,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 05:46:58,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 05:46:59,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:46:59,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271261817] [2021-11-03 05:46:59,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271261817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:46:59,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:46:59,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:46:59,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90085520] [2021-11-03 05:46:59,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:46:59,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:46:59,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:46:59,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:46:59,029 INFO L87 Difference]: Start difference. First operand 1571 states and 2301 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:59,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:46:59,173 INFO L93 Difference]: Finished difference Result 2702 states and 3957 transitions. [2021-11-03 05:46:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:46:59,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 05:46:59,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:46:59,183 INFO L225 Difference]: With dead ends: 2702 [2021-11-03 05:46:59,184 INFO L226 Difference]: Without dead ends: 1142 [2021-11-03 05:46:59,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:46:59,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-11-03 05:46:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1115. [2021-11-03 05:46:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 1.4631956912028725) internal successors, (1630), 1114 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1630 transitions. [2021-11-03 05:46:59,231 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1630 transitions. Word has length 66 [2021-11-03 05:46:59,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:46:59,231 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 1630 transitions. [2021-11-03 05:46:59,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1630 transitions. [2021-11-03 05:46:59,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 05:46:59,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:46:59,235 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:46:59,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:46:59,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:46:59,452 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:46:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:46:59,452 INFO L85 PathProgramCache]: Analyzing trace with hash -892127492, now seen corresponding path program 2 times [2021-11-03 05:46:59,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:46:59,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25819007] [2021-11-03 05:46:59,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:46:59,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:46:59,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:46:59,455 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:46:59,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:47:03,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:47:03,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:47:03,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:47:03,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:47:03,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:47:03,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:03,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25819007] [2021-11-03 05:47:03,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25819007] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:03,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:03,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:47:03,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165448741] [2021-11-03 05:47:03,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:47:03,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:03,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:47:03,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:03,873 INFO L87 Difference]: Start difference. First operand 1115 states and 1630 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:04,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:04,267 INFO L93 Difference]: Finished difference Result 4869 states and 7159 transitions. [2021-11-03 05:47:04,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:47:04,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 05:47:04,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:04,295 INFO L225 Difference]: With dead ends: 4869 [2021-11-03 05:47:04,296 INFO L226 Difference]: Without dead ends: 3778 [2021-11-03 05:47:04,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:47:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2021-11-03 05:47:04,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 1131. [2021-11-03 05:47:04,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 1.4566371681415928) internal successors, (1646), 1130 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1646 transitions. [2021-11-03 05:47:04,383 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1646 transitions. Word has length 66 [2021-11-03 05:47:04,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:04,384 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1646 transitions. [2021-11-03 05:47:04,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1646 transitions. [2021-11-03 05:47:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 05:47:04,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:04,388 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:47:04,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:04,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:04,602 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:47:04,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:04,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1161719077, now seen corresponding path program 1 times [2021-11-03 05:47:04,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:04,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684948059] [2021-11-03 05:47:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:04,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:04,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:04,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:04,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:47:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:05,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:47:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:47:05,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:47:05,705 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:05,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684948059] [2021-11-03 05:47:05,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684948059] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:05,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:05,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-03 05:47:05,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864328162] [2021-11-03 05:47:05,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:47:05,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:05,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:47:05,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:47:05,707 INFO L87 Difference]: Start difference. First operand 1131 states and 1646 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:07,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:07,065 INFO L93 Difference]: Finished difference Result 4561 states and 6685 transitions. [2021-11-03 05:47:07,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:47:07,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 05:47:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:07,087 INFO L225 Difference]: With dead ends: 4561 [2021-11-03 05:47:07,088 INFO L226 Difference]: Without dead ends: 3454 [2021-11-03 05:47:07,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:47:07,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2021-11-03 05:47:07,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 1147. [2021-11-03 05:47:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.443280977312391) internal successors, (1654), 1146 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:07,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1654 transitions. [2021-11-03 05:47:07,212 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1654 transitions. Word has length 69 [2021-11-03 05:47:07,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:07,213 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1654 transitions. [2021-11-03 05:47:07,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1654 transitions. [2021-11-03 05:47:07,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 05:47:07,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:07,216 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:47:07,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:07,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:07,434 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:47:07,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:07,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1273317856, now seen corresponding path program 1 times [2021-11-03 05:47:07,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:07,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888246758] [2021-11-03 05:47:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:07,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:07,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:07,438 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:07,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:47:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:07,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 05:47:07,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:47:08,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:47:09,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:09,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888246758] [2021-11-03 05:47:09,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888246758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:09,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:09,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 11 [2021-11-03 05:47:09,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994301683] [2021-11-03 05:47:09,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 05:47:09,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:09,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 05:47:09,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:47:09,006 INFO L87 Difference]: Start difference. First operand 1147 states and 1654 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:17,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:17,568 INFO L93 Difference]: Finished difference Result 6013 states and 8757 transitions. [2021-11-03 05:47:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 05:47:17,570 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 05:47:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:17,594 INFO L225 Difference]: With dead ends: 6013 [2021-11-03 05:47:17,594 INFO L226 Difference]: Without dead ends: 4890 [2021-11-03 05:47:17,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-11-03 05:47:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4890 states. [2021-11-03 05:47:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4890 to 1203. [2021-11-03 05:47:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.4292845257903495) internal successors, (1718), 1202 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1718 transitions. [2021-11-03 05:47:17,791 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1718 transitions. Word has length 71 [2021-11-03 05:47:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:17,791 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1718 transitions. [2021-11-03 05:47:17,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:17,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1718 transitions. [2021-11-03 05:47:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 05:47:17,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:17,798 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:47:17,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:18,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:18,013 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:47:18,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:18,014 INFO L85 PathProgramCache]: Analyzing trace with hash -207364913, now seen corresponding path program 1 times [2021-11-03 05:47:18,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:18,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017530298] [2021-11-03 05:47:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:18,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:18,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:18,016 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:18,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:47:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:18,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:47:18,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:47:18,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:47:19,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:19,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017530298] [2021-11-03 05:47:19,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017530298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:19,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:19,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:47:19,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180731035] [2021-11-03 05:47:19,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:47:19,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:19,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:47:19,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:47:19,002 INFO L87 Difference]: Start difference. First operand 1203 states and 1718 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:19,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:19,197 INFO L93 Difference]: Finished difference Result 2929 states and 4195 transitions. [2021-11-03 05:47:19,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:47:19,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-03 05:47:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:19,210 INFO L225 Difference]: With dead ends: 2929 [2021-11-03 05:47:19,211 INFO L226 Difference]: Without dead ends: 2322 [2021-11-03 05:47:19,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:47:19,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-11-03 05:47:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 1211. [2021-11-03 05:47:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 1.4264462809917355) internal successors, (1726), 1210 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1726 transitions. [2021-11-03 05:47:19,359 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1726 transitions. Word has length 77 [2021-11-03 05:47:19,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:19,359 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 1726 transitions. [2021-11-03 05:47:19,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:19,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1726 transitions. [2021-11-03 05:47:19,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 05:47:19,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:19,362 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:47:19,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:19,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:19,581 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:47:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:19,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1597670354, now seen corresponding path program 1 times [2021-11-03 05:47:19,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:19,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931007359] [2021-11-03 05:47:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:19,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:19,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:19,584 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:19,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:47:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:20,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:47:20,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:47:20,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:47:20,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:20,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931007359] [2021-11-03 05:47:20,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931007359] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:20,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:20,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:47:20,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959337518] [2021-11-03 05:47:20,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:47:20,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:20,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:47:20,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:47:20,927 INFO L87 Difference]: Start difference. First operand 1211 states and 1726 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:25,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:25,591 INFO L93 Difference]: Finished difference Result 3497 states and 4994 transitions. [2021-11-03 05:47:25,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:47:25,593 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-03 05:47:25,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:25,605 INFO L225 Difference]: With dead ends: 3497 [2021-11-03 05:47:25,605 INFO L226 Difference]: Without dead ends: 2310 [2021-11-03 05:47:25,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:47:25,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-11-03 05:47:25,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1199. [2021-11-03 05:47:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 1.4207011686143574) internal successors, (1702), 1198 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1702 transitions. [2021-11-03 05:47:25,758 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1702 transitions. Word has length 79 [2021-11-03 05:47:25,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:25,759 INFO L470 AbstractCegarLoop]: Abstraction has 1199 states and 1702 transitions. [2021-11-03 05:47:25,759 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1702 transitions. [2021-11-03 05:47:25,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 05:47:25,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:25,762 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:47:25,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:25,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:25,980 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:47:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1802324330, now seen corresponding path program 1 times [2021-11-03 05:47:25,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:25,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232930148] [2021-11-03 05:47:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:25,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:25,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:25,982 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:25,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:47:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:26,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:47:26,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:26,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-03 05:47:26,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-03 05:47:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:47:27,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:47:27,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:27,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232930148] [2021-11-03 05:47:27,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232930148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:27,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:27,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-03 05:47:27,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541595321] [2021-11-03 05:47:27,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:47:27,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:27,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:47:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:47:27,468 INFO L87 Difference]: Start difference. First operand 1199 states and 1702 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:42,822 INFO L93 Difference]: Finished difference Result 2683 states and 3854 transitions. [2021-11-03 05:48:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:48:42,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-03 05:48:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:42,831 INFO L225 Difference]: With dead ends: 2683 [2021-11-03 05:48:42,832 INFO L226 Difference]: Without dead ends: 1508 [2021-11-03 05:48:42,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:48:42,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-11-03 05:48:42,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1215. [2021-11-03 05:48:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 1.4217462932454694) internal successors, (1726), 1214 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1726 transitions. [2021-11-03 05:48:42,969 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1726 transitions. Word has length 84 [2021-11-03 05:48:42,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:42,969 INFO L470 AbstractCegarLoop]: Abstraction has 1215 states and 1726 transitions. [2021-11-03 05:48:42,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:42,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1726 transitions. [2021-11-03 05:48:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 05:48:42,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:42,972 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:48:42,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:43,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:43,197 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:48:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:43,197 INFO L85 PathProgramCache]: Analyzing trace with hash 125948372, now seen corresponding path program 1 times [2021-11-03 05:48:43,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:43,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332746508] [2021-11-03 05:48:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:43,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:43,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:43,199 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:43,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:48:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:44,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:48:44,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:44,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:44,458 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:44,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332746508] [2021-11-03 05:48:44,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332746508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:44,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:44,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:48:44,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977490130] [2021-11-03 05:48:44,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:48:44,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:44,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:48:44,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:48:44,459 INFO L87 Difference]: Start difference. First operand 1215 states and 1726 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:44,677 INFO L93 Difference]: Finished difference Result 2899 states and 4128 transitions. [2021-11-03 05:48:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:48:44,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-03 05:48:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:44,688 INFO L225 Difference]: With dead ends: 2899 [2021-11-03 05:48:44,688 INFO L226 Difference]: Without dead ends: 1708 [2021-11-03 05:48:44,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:48:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2021-11-03 05:48:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1203. [2021-11-03 05:48:44,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.415973377703827) internal successors, (1702), 1202 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1702 transitions. [2021-11-03 05:48:44,816 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1702 transitions. Word has length 84 [2021-11-03 05:48:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:44,816 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1702 transitions. [2021-11-03 05:48:44,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:44,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1702 transitions. [2021-11-03 05:48:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 05:48:44,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:44,819 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:48:44,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:45,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:45,039 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:48:45,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:45,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1909434924, now seen corresponding path program 1 times [2021-11-03 05:48:45,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:45,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746000447] [2021-11-03 05:48:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:45,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:45,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:45,042 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:45,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:48:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:45,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:48:45,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:46,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:46,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:46,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746000447] [2021-11-03 05:48:46,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746000447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:46,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:46,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:48:46,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604396392] [2021-11-03 05:48:46,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:48:46,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:46,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:48:46,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:48:46,276 INFO L87 Difference]: Start difference. First operand 1203 states and 1702 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:56,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:56,623 INFO L93 Difference]: Finished difference Result 2386 states and 3382 transitions. [2021-11-03 05:48:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:48:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-03 05:48:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:56,629 INFO L225 Difference]: With dead ends: 2386 [2021-11-03 05:48:56,629 INFO L226 Difference]: Without dead ends: 1207 [2021-11-03 05:48:56,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:48:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-11-03 05:48:56,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1207. [2021-11-03 05:48:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.4145936981757876) internal successors, (1706), 1206 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1706 transitions. [2021-11-03 05:48:56,771 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1706 transitions. Word has length 84 [2021-11-03 05:48:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:56,771 INFO L470 AbstractCegarLoop]: Abstraction has 1207 states and 1706 transitions. [2021-11-03 05:48:56,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1706 transitions. [2021-11-03 05:48:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:48:56,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:56,774 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:48:56,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:56,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:56,994 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:48:56,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:56,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1133422249, now seen corresponding path program 1 times [2021-11-03 05:48:56,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:56,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084155851] [2021-11-03 05:48:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:56,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:56,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:56,997 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:57,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:48:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:57,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:48:57,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:58,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:58,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:58,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084155851] [2021-11-03 05:48:58,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084155851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:48:58,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1755957940] [2021-11-03 05:48:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:58,388 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:48:58,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:48:58,390 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:48:58,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-03 05:48:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:59,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:48:59,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:59,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:49:00,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1755957940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:49:00,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377377985] [2021-11-03 05:49:00,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:00,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:49:00,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:49:00,028 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:49:00,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-03 05:49:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:01,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:49:01,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:49:01,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:49:01,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377377985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:49:01,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 05:49:01,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 13 [2021-11-03 05:49:01,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517113894] [2021-11-03 05:49:01,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:49:01,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:01,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:49:01,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:49:01,563 INFO L87 Difference]: Start difference. First operand 1207 states and 1706 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:08,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:08,114 INFO L93 Difference]: Finished difference Result 3363 states and 4748 transitions. [2021-11-03 05:49:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:49:08,116 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:49:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:08,125 INFO L225 Difference]: With dead ends: 3363 [2021-11-03 05:49:08,125 INFO L226 Difference]: Without dead ends: 2180 [2021-11-03 05:49:08,127 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:49:08,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-11-03 05:49:08,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1211. [2021-11-03 05:49:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 1.4132231404958677) internal successors, (1710), 1210 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1710 transitions. [2021-11-03 05:49:08,277 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1710 transitions. Word has length 85 [2021-11-03 05:49:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:08,277 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 1710 transitions. [2021-11-03 05:49:08,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1710 transitions. [2021-11-03 05:49:08,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 05:49:08,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:08,283 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:49:08,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:49:08,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:49:08,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 05:49:08,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:49:08,890 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:49:08,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:08,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2036972470, now seen corresponding path program 1 times [2021-11-03 05:49:08,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:08,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821865032] [2021-11-03 05:49:08,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:08,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:08,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:08,892 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:08,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:49:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:10,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:49:10,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:49:10,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:49:10,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:49:10,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821865032] [2021-11-03 05:49:10,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821865032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:49:10,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [901583300] [2021-11-03 05:49:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:10,595 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:49:10,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:49:10,596 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:49:10,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-03 05:49:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:12,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:49:12,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:49:12,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:49:12,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [901583300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:49:12,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964201826] [2021-11-03 05:49:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:12,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:49:12,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:49:12,431 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:49:12,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-03 05:49:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:13,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:49:13,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:49:13,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:49:13,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964201826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:49:13,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:49:13,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-03 05:49:13,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825974339] [2021-11-03 05:49:13,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:49:13,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:13,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:49:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:49:13,869 INFO L87 Difference]: Start difference. First operand 1211 states and 1710 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:26,292 INFO L93 Difference]: Finished difference Result 2406 states and 3406 transitions. [2021-11-03 05:49:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:49:26,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-03 05:49:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:26,295 INFO L225 Difference]: With dead ends: 2406 [2021-11-03 05:49:26,296 INFO L226 Difference]: Without dead ends: 1219 [2021-11-03 05:49:26,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:49:26,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-11-03 05:49:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1219. [2021-11-03 05:49:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 1.4105090311986863) internal successors, (1718), 1218 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1718 transitions. [2021-11-03 05:49:26,402 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1718 transitions. Word has length 86 [2021-11-03 05:49:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:26,403 INFO L470 AbstractCegarLoop]: Abstraction has 1219 states and 1718 transitions. [2021-11-03 05:49:26,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:26,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1718 transitions. [2021-11-03 05:49:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-03 05:49:26,406 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:26,406 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-03 05:49:26,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:49:26,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-03 05:49:26,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:49:27,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:49:27,014 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:49:27,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:27,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1528278614, now seen corresponding path program 2 times [2021-11-03 05:49:27,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:27,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333341212] [2021-11-03 05:49:27,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:49:27,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:27,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:27,016 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:27,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:49:32,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:49:32,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:49:32,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:49:32,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:49:32,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:49:33,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:49:33,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333341212] [2021-11-03 05:49:33,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333341212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:49:33,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [447409271] [2021-11-03 05:49:33,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:49:33,524 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:49:33,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:49:33,525 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:49:33,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-03 05:49:40,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:49:40,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:49:40,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:49:40,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:49:40,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:49:41,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [447409271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:49:41,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692637344] [2021-11-03 05:49:41,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:49:41,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:49:41,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:49:41,013 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:49:41,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-03 05:49:46,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:49:46,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:49:46,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:49:46,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:49:46,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:49:47,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692637344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:49:47,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:49:47,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-03 05:49:47,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783246719] [2021-11-03 05:49:47,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 05:49:47,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:47,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 05:49:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:49:47,196 INFO L87 Difference]: Start difference. First operand 1219 states and 1718 transitions. Second operand has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:50:10,977 INFO L93 Difference]: Finished difference Result 4091 states and 5767 transitions. [2021-11-03 05:50:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 05:50:10,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-03 05:50:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:50:10,986 INFO L225 Difference]: With dead ends: 4091 [2021-11-03 05:50:10,987 INFO L226 Difference]: Without dead ends: 2896 [2021-11-03 05:50:10,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-11-03 05:50:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2021-11-03 05:50:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 1235. [2021-11-03 05:50:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1234 states have (on average 1.4051863857374391) internal successors, (1734), 1234 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1734 transitions. [2021-11-03 05:50:11,142 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1734 transitions. Word has length 88 [2021-11-03 05:50:11,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:50:11,143 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 1734 transitions. [2021-11-03 05:50:11,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1734 transitions. [2021-11-03 05:50:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-03 05:50:11,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:50:11,146 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:50:11,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:11,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:11,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:11,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:50:11,770 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:50:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:50:11,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1548916899, now seen corresponding path program 1 times [2021-11-03 05:50:11,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:50:11,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415761682] [2021-11-03 05:50:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:11,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:50:11,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:50:11,772 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:50:11,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 05:50:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:12,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:50:12,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:50:13,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:50:13,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:50:13,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415761682] [2021-11-03 05:50:13,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415761682] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:50:13,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:50:13,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:50:13,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451599063] [2021-11-03 05:50:13,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:50:13,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:50:13,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:50:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:50:13,329 INFO L87 Difference]: Start difference. First operand 1235 states and 1734 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:50:13,468 INFO L93 Difference]: Finished difference Result 2805 states and 3954 transitions. [2021-11-03 05:50:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:50:13,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-03 05:50:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:50:13,471 INFO L225 Difference]: With dead ends: 2805 [2021-11-03 05:50:13,471 INFO L226 Difference]: Without dead ends: 1594 [2021-11-03 05:50:13,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:50:13,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-11-03 05:50:13,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1223. [2021-11-03 05:50:13,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 1222 states have (on average 1.3993453355155483) internal successors, (1710), 1222 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1710 transitions. [2021-11-03 05:50:13,658 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1710 transitions. Word has length 92 [2021-11-03 05:50:13,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:50:13,658 INFO L470 AbstractCegarLoop]: Abstraction has 1223 states and 1710 transitions. [2021-11-03 05:50:13,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1710 transitions. [2021-11-03 05:50:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-03 05:50:13,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:50:13,661 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:50:13,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:13,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:50:13,883 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:50:13,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:50:13,883 INFO L85 PathProgramCache]: Analyzing trace with hash -581231453, now seen corresponding path program 1 times [2021-11-03 05:50:13,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:50:13,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802593309] [2021-11-03 05:50:13,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:13,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:50:13,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:50:13,885 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:50:13,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 05:50:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:15,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:50:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:50:15,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:50:15,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:50:15,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802593309] [2021-11-03 05:50:15,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802593309] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:50:15,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:50:15,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:50:15,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964891765] [2021-11-03 05:50:15,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:50:15,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:50:15,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:50:15,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:50:15,513 INFO L87 Difference]: Start difference. First operand 1223 states and 1710 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:50:19,779 INFO L93 Difference]: Finished difference Result 2426 states and 3398 transitions. [2021-11-03 05:50:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:50:19,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-03 05:50:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:50:19,781 INFO L225 Difference]: With dead ends: 2426 [2021-11-03 05:50:19,781 INFO L226 Difference]: Without dead ends: 1227 [2021-11-03 05:50:19,783 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:50:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-11-03 05:50:19,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1227. [2021-11-03 05:50:19,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 1.398042414355628) internal successors, (1714), 1226 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:19,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1714 transitions. [2021-11-03 05:50:19,884 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1714 transitions. Word has length 92 [2021-11-03 05:50:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:50:19,885 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 1714 transitions. [2021-11-03 05:50:19,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1714 transitions. [2021-11-03 05:50:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-03 05:50:19,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:50:19,888 INFO L513 BasicCegarLoop]: trace histogram [7, 3, 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] [2021-11-03 05:50:19,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:20,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:50:20,093 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:50:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:50:20,094 INFO L85 PathProgramCache]: Analyzing trace with hash 658971542, now seen corresponding path program 3 times [2021-11-03 05:50:20,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:50:20,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044599974] [2021-11-03 05:50:20,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:50:20,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:50:20,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:50:20,095 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:50:20,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 05:50:47,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-03 05:50:47,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:50:47,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:50:47,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:50:48,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:50:49,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:50:49,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044599974] [2021-11-03 05:50:49,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044599974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:50:49,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1159958546] [2021-11-03 05:50:49,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:50:49,766 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:50:49,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:50:49,767 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:50:49,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deaf6bf3-640b-4ecf-9123-add576a5bca4/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process