./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c78ec383567aee735f8895b5666134248c3b9de1b96295d83b3c1c6979534c2b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:37:24,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:37:24,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:37:24,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:37:24,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:37:24,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:37:24,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:37:24,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:37:24,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:37:24,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:37:24,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:37:24,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:37:24,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:37:24,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:37:24,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:37:24,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:37:24,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:37:24,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:37:24,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:37:24,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:37:24,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:37:24,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:37:24,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:37:24,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:37:24,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:37:24,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:37:24,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:37:24,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:37:24,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:37:24,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:37:24,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:37:24,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:37:24,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:37:24,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:37:24,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:37:24,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:37:24,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:37:24,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:37:24,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:37:24,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:37:24,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:37:24,756 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:37:24,795 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:37:24,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:37:24,796 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:37:24,796 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:37:24,797 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:37:24,797 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:37:24,797 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:37:24,797 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:37:24,798 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:37:24,798 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:37:24,798 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:37:24,798 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:37:24,799 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:37:24,799 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:37:24,799 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:37:24,799 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:37:24,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:37:24,800 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:37:24,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:37:24,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:37:24,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:37:24,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:37:24,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:37:24,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:37:24,802 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:37:24,802 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:37:24,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:37:24,803 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:37:24,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:37:24,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:37:24,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:37:24,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:37:24,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:37:24,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:37:24,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:37:24,805 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:37:24,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:37:24,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:37:24,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:37:24,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:37:24,806 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_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c78ec383567aee735f8895b5666134248c3b9de1b96295d83b3c1c6979534c2b [2021-11-12 23:37:25,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:37:25,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:37:25,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:37:25,114 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:37:25,115 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:37:25,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i [2021-11-12 23:37:25,188 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/data/de3f979fb/351a02adb0b64a1aa895341546261dbe/FLAG97723b359 [2021-11-12 23:37:25,865 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:37:25,866 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i [2021-11-12 23:37:25,905 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/data/de3f979fb/351a02adb0b64a1aa895341546261dbe/FLAG97723b359 [2021-11-12 23:37:26,094 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/data/de3f979fb/351a02adb0b64a1aa895341546261dbe [2021-11-12 23:37:26,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:37:26,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:37:26,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:37:26,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:37:26,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:37:26,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:37:26" (1/1) ... [2021-11-12 23:37:26,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66540b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:26, skipping insertion in model container [2021-11-12 23:37:26,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:37:26" (1/1) ... [2021-11-12 23:37:26,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:37:26,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:37:26,578 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_81f7b058-3d17-4b0d-a7ca-865ca86f849e/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i[33021,33034] [2021-11-12 23:37:26,731 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_81f7b058-3d17-4b0d-a7ca-865ca86f849e/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i[49681,49694] [2021-11-12 23:37:26,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:37:26,770 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:37:26,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7d2ad014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:26, skipping insertion in model container [2021-11-12 23:37:26,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:37:26,772 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:37:26,773 INFO L158 Benchmark]: Toolchain (without parser) took 674.69ms. Allocated memory is still 123.7MB. Free memory was 92.1MB in the beginning and 83.4MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:37:26,774 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 123.7MB. Free memory is still 79.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:37:26,775 INFO L158 Benchmark]: CACSL2BoogieTranslator took 672.32ms. Allocated memory is still 123.7MB. Free memory was 91.7MB in the beginning and 83.4MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:37:26,776 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 123.7MB. Free memory is still 79.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 672.32ms. Allocated memory is still 123.7MB. Free memory was 91.7MB in the beginning and 83.4MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 737]: 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_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c78ec383567aee735f8895b5666134248c3b9de1b96295d83b3c1c6979534c2b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:37:28,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:37:28,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:37:28,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:37:28,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:37:28,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:37:28,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:37:29,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:37:29,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:37:29,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:37:29,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:37:29,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:37:29,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:37:29,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:37:29,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:37:29,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:37:29,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:37:29,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:37:29,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:37:29,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:37:29,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:37:29,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:37:29,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:37:29,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:37:29,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:37:29,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:37:29,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:37:29,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:37:29,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:37:29,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:37:29,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:37:29,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:37:29,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:37:29,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:37:29,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:37:29,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:37:29,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:37:29,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:37:29,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:37:29,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:37:29,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:37:29,075 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:37:29,123 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:37:29,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:37:29,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:37:29,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:37:29,125 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:37:29,126 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:37:29,126 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:37:29,126 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:37:29,126 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:37:29,127 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:37:29,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:37:29,129 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:37:29,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:37:29,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:37:29,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:37:29,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:37:29,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:37:29,130 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:37:29,131 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:37:29,131 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:37:29,131 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:37:29,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:37:29,132 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:37:29,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:37:29,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:37:29,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:37:29,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:37:29,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:37:29,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:37:29,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:37:29,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:37:29,134 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:37:29,134 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:37:29,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:37:29,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:37:29,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:37:29,135 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_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c78ec383567aee735f8895b5666134248c3b9de1b96295d83b3c1c6979534c2b [2021-11-12 23:37:29,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:37:29,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:37:29,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:37:29,578 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:37:29,579 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:37:29,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i [2021-11-12 23:37:29,649 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/data/91112b5c8/ad028fae9fcf4526b416e2642ee38da4/FLAGd3772dc57 [2021-11-12 23:37:30,442 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:37:30,448 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i [2021-11-12 23:37:30,472 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/data/91112b5c8/ad028fae9fcf4526b416e2642ee38da4/FLAGd3772dc57 [2021-11-12 23:37:30,555 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/data/91112b5c8/ad028fae9fcf4526b416e2642ee38da4 [2021-11-12 23:37:30,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:37:30,559 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:37:30,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:37:30,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:37:30,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:37:30,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:37:30" (1/1) ... [2021-11-12 23:37:30,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f7f382f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:30, skipping insertion in model container [2021-11-12 23:37:30,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:37:30" (1/1) ... [2021-11-12 23:37:30,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:37:30,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:37:31,021 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_81f7b058-3d17-4b0d-a7ca-865ca86f849e/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i[33021,33034] [2021-11-12 23:37:31,255 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_81f7b058-3d17-4b0d-a7ca-865ca86f849e/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i[49681,49694] [2021-11-12 23:37:31,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:37:31,301 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:37:31,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:37:31,347 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_81f7b058-3d17-4b0d-a7ca-865ca86f849e/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i[33021,33034] [2021-11-12 23:37:31,485 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_81f7b058-3d17-4b0d-a7ca-865ca86f849e/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i[49681,49694] [2021-11-12 23:37:31,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:37:31,507 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:37:31,529 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_81f7b058-3d17-4b0d-a7ca-865ca86f849e/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i[33021,33034] [2021-11-12 23:37:31,580 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_81f7b058-3d17-4b0d-a7ca-865ca86f849e/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i[49681,49694] [2021-11-12 23:37:31,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:37:31,649 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:37:31,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:31 WrapperNode [2021-11-12 23:37:31,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:37:31,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:37:31,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:37:31,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:37:31,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:31" (1/1) ... [2021-11-12 23:37:31,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:31" (1/1) ... [2021-11-12 23:37:31,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:37:31,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:37:31,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:37:31,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:37:31,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:31" (1/1) ... [2021-11-12 23:37:31,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:31" (1/1) ... [2021-11-12 23:37:31,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:31" (1/1) ... [2021-11-12 23:37:31,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:31" (1/1) ... [2021-11-12 23:37:31,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:31" (1/1) ... [2021-11-12 23:37:31,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:31" (1/1) ... [2021-11-12 23:37:31,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:31" (1/1) ... [2021-11-12 23:37:32,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:37:32,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:37:32,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:37:32,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:37:32,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:31" (1/1) ... [2021-11-12 23:37:32,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:37:32,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:37:32,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:37:32,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:37:32,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:37:32,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:37:32,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:37:32,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:37:32,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:37:32,110 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:37:32,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:37:32,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:37:32,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:37:32,110 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 23:37:32,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:37:32,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:37:32,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:37:32,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:37:32,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:37:32,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:37:42,607 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:37:42,611 INFO L299 CfgBuilder]: Removed 92 assume(true) statements. [2021-11-12 23:37:42,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:37:42 BoogieIcfgContainer [2021-11-12 23:37:42,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:37:42,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:37:42,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:37:42,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:37:42,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:37:30" (1/3) ... [2021-11-12 23:37:42,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b46689e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:37:42, skipping insertion in model container [2021-11-12 23:37:42,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:31" (2/3) ... [2021-11-12 23:37:42,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b46689e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:37:42, skipping insertion in model container [2021-11-12 23:37:42,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:37:42" (3/3) ... [2021-11-12 23:37:42,625 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test5-2.i [2021-11-12 23:37:42,633 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:37:42,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:37:42,700 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:37:42,707 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:37:42,707 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:37:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 287 states, 271 states have (on average 1.6974169741697418) internal successors, (460), 278 states have internal predecessors, (460), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-12 23:37:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:37:42,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:42,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:37:42,738 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:42,743 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2021-11-12 23:37:42,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:42,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025354556] [2021-11-12 23:37:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:42,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:42,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:42,757 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:42,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:37:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:42,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:37:42,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:37:43,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:37:43,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:43,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025354556] [2021-11-12 23:37:43,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025354556] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:37:43,053 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:37:43,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:37:43,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199777131] [2021-11-12 23:37:43,056 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:37:43,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:37:43,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:43,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:37:43,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:37:43,122 INFO L87 Difference]: Start difference. First operand has 287 states, 271 states have (on average 1.6974169741697418) internal successors, (460), 278 states have internal predecessors, (460), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-12 23:37:43,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:37:43,238 INFO L93 Difference]: Finished difference Result 572 states and 967 transitions. [2021-11-12 23:37:43,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:37:43,242 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-11-12 23:37:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:37:43,255 INFO L225 Difference]: With dead ends: 572 [2021-11-12 23:37:43,255 INFO L226 Difference]: Without dead ends: 254 [2021-11-12 23:37:43,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:37:43,269 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.86ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:37:43,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 4.86ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:37:43,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-12 23:37:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-12 23:37:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-12 23:37:43,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2021-11-12 23:37:43,343 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2021-11-12 23:37:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:37:43,344 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2021-11-12 23:37:43,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-12 23:37:43,347 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2021-11-12 23:37:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-12 23:37:43,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:43,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:37:43,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 23:37:43,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:37:43,568 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:43,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:43,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2021-11-12 23:37:43,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:43,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357778235] [2021-11-12 23:37:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:43,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:43,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:43,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:43,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:37:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:43,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:37:43,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:37:43,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:37:44,111 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:44,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357778235] [2021-11-12 23:37:44,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357778235] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:37:44,112 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:37:44,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:37:44,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200389841] [2021-11-12 23:37:44,113 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:37:44,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:37:44,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:44,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:37:44,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:37:44,116 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-11-12 23:37:44,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:37:44,483 INFO L93 Difference]: Finished difference Result 575 states and 771 transitions. [2021-11-12 23:37:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:37:44,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 42 [2021-11-12 23:37:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:37:44,489 INFO L225 Difference]: With dead ends: 575 [2021-11-12 23:37:44,490 INFO L226 Difference]: Without dead ends: 497 [2021-11-12 23:37:44,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:37:44,492 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 600 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 283.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.52ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 318.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:37:44,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 719 Invalid, 30 Unknown, 0 Unchecked, 7.52ms Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 318.69ms Time] [2021-11-12 23:37:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-12 23:37:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 425. [2021-11-12 23:37:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 404 states have (on average 1.306930693069307) internal successors, (528), 410 states have internal predecessors, (528), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-12 23:37:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 562 transitions. [2021-11-12 23:37:44,534 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 562 transitions. Word has length 42 [2021-11-12 23:37:44,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:37:44,534 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 562 transitions. [2021-11-12 23:37:44,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-11-12 23:37:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 562 transitions. [2021-11-12 23:37:44,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-12 23:37:44,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:44,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:37:44,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:37:44,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:37:44,763 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:44,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:44,764 INFO L85 PathProgramCache]: Analyzing trace with hash 627365017, now seen corresponding path program 1 times [2021-11-12 23:37:44,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:44,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568989833] [2021-11-12 23:37:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:44,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:44,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:44,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:44,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:37:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:45,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:37:45,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:37:46,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:37:46,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:46,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568989833] [2021-11-12 23:37:46,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568989833] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:37:46,719 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:37:46,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:37:46,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509226631] [2021-11-12 23:37:46,720 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:37:46,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:37:46,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:46,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:37:46,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:37:46,722 INFO L87 Difference]: Start difference. First operand 425 states and 562 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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) [2021-11-12 23:37:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:37:46,848 INFO L93 Difference]: Finished difference Result 850 states and 1130 transitions. [2021-11-12 23:37:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:37:46,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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 238 [2021-11-12 23:37:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:37:46,852 INFO L225 Difference]: With dead ends: 850 [2021-11-12 23:37:46,852 INFO L226 Difference]: Without dead ends: 433 [2021-11-12 23:37:46,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:37:46,856 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 291 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.81ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:37:46,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 669 Invalid, 69 Unknown, 0 Unchecked, 3.81ms Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 90.75ms Time] [2021-11-12 23:37:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-12 23:37:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2021-11-12 23:37:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 416 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-12 23:37:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 552 transitions. [2021-11-12 23:37:46,886 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 552 transitions. Word has length 238 [2021-11-12 23:37:46,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:37:46,887 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 552 transitions. [2021-11-12 23:37:46,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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) [2021-11-12 23:37:46,887 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 552 transitions. [2021-11-12 23:37:46,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-12 23:37:46,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:46,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:37:46,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:37:47,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:37:47,116 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:47,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1137440641, now seen corresponding path program 1 times [2021-11-12 23:37:47,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:47,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781428247] [2021-11-12 23:37:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:47,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:47,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:47,121 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:47,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:37:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:47,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:37:47,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 23:37:48,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 23:37:49,273 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:49,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781428247] [2021-11-12 23:37:49,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781428247] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:37:49,274 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:37:49,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:37:49,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696368032] [2021-11-12 23:37:49,275 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:37:49,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:37:49,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:49,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:37:49,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:37:49,277 INFO L87 Difference]: Start difference. First operand 431 states and 552 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2021-11-12 23:37:49,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:37:49,471 INFO L93 Difference]: Finished difference Result 807 states and 1042 transitions. [2021-11-12 23:37:49,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:37:49,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 238 [2021-11-12 23:37:49,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:37:49,483 INFO L225 Difference]: With dead ends: 807 [2021-11-12 23:37:49,483 INFO L226 Difference]: Without dead ends: 429 [2021-11-12 23:37:49,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:37:49,485 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 11 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.17ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 173.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:37:49,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 635 Invalid, 8 Unknown, 0 Unchecked, 2.17ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 173.54ms Time] [2021-11-12 23:37:49,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-12 23:37:49,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-11-12 23:37:49,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 408 states have (on average 1.2622549019607843) internal successors, (515), 414 states have internal predecessors, (515), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-12 23:37:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 549 transitions. [2021-11-12 23:37:49,508 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 549 transitions. Word has length 238 [2021-11-12 23:37:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:37:49,509 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 549 transitions. [2021-11-12 23:37:49,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2021-11-12 23:37:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 549 transitions. [2021-11-12 23:37:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-12 23:37:49,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:49,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:37:49,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:37:49,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:37:49,736 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:49,736 INFO L85 PathProgramCache]: Analyzing trace with hash 350641186, now seen corresponding path program 1 times [2021-11-12 23:37:49,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:49,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955670606] [2021-11-12 23:37:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:49,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:49,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:49,741 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:49,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:37:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:50,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:37:50,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-12 23:37:50,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 23:37:51,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:51,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955670606] [2021-11-12 23:37:51,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955670606] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:37:51,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:37:51,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:37:51,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314399062] [2021-11-12 23:37:51,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:37:51,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:37:51,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:51,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:37:51,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:37:51,585 INFO L87 Difference]: Start difference. First operand 429 states and 549 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:37:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:37:51,673 INFO L93 Difference]: Finished difference Result 814 states and 1061 transitions. [2021-11-12 23:37:51,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:37:51,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 253 [2021-11-12 23:37:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:37:51,678 INFO L225 Difference]: With dead ends: 814 [2021-11-12 23:37:51,678 INFO L226 Difference]: Without dead ends: 432 [2021-11-12 23:37:51,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:37:51,681 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 2 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.90ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:37:51,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 959 Invalid, 21 Unknown, 0 Unchecked, 2.90ms Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 53.63ms Time] [2021-11-12 23:37:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-12 23:37:51,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2021-11-12 23:37:51,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 417 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-12 23:37:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 556 transitions. [2021-11-12 23:37:51,708 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 556 transitions. Word has length 253 [2021-11-12 23:37:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:37:51,709 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 556 transitions. [2021-11-12 23:37:51,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:37:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 556 transitions. [2021-11-12 23:37:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-12 23:37:51,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:51,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:37:51,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:37:51,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:37:51,928 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash 998930052, now seen corresponding path program 1 times [2021-11-12 23:37:51,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:51,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796183551] [2021-11-12 23:37:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:51,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:51,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:51,931 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:51,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:37:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:52,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:37:52,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 23:37:53,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 23:37:53,649 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:53,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796183551] [2021-11-12 23:37:53,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796183551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:37:53,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [466134162] [2021-11-12 23:37:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:53,653 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:37:53,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:37:53,655 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:37:53,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 23:37:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:54,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:37:54,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:37:54,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:37:55,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [466134162] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:37:55,696 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:37:55,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 10] imperfect sequences [5, 5] total 16 [2021-11-12 23:37:55,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528237301] [2021-11-12 23:37:55,697 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:37:55,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:37:55,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:37:55,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:37:55,699 INFO L87 Difference]: Start difference. First operand 432 states and 556 transitions. Second operand has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:37:55,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:37:55,892 INFO L93 Difference]: Finished difference Result 810 states and 1058 transitions. [2021-11-12 23:37:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:37:55,896 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-12 23:37:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:37:55,900 INFO L225 Difference]: With dead ends: 810 [2021-11-12 23:37:55,900 INFO L226 Difference]: Without dead ends: 478 [2021-11-12 23:37:55,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1002 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:37:55,902 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 41 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.60ms SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:37:55,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 878 Invalid, 151 Unknown, 0 Unchecked, 3.60ms Time], IncrementalHoareTripleChecker [76 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 166.92ms Time] [2021-11-12 23:37:55,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-12 23:37:55,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 472. [2021-11-12 23:37:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 450 states have (on average 1.24) internal successors, (558), 457 states have internal predecessors, (558), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-12 23:37:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 596 transitions. [2021-11-12 23:37:55,925 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 596 transitions. Word has length 255 [2021-11-12 23:37:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:37:55,925 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 596 transitions. [2021-11-12 23:37:55,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:37:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 596 transitions. [2021-11-12 23:37:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-12 23:37:55,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:55,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:37:55,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:37:56,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-12 23:37:56,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:37:56,349 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:56,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:56,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2108414208, now seen corresponding path program 1 times [2021-11-12 23:37:56,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:56,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851040031] [2021-11-12 23:37:56,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:56,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:56,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:56,353 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:56,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:37:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:56,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:37:56,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 23:37:57,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 23:37:57,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:57,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851040031] [2021-11-12 23:37:57,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851040031] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:37:57,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [677906496] [2021-11-12 23:37:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:57,988 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:37:57,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:37:57,990 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:37:58,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 23:37:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:58,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:37:58,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:37:59,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:37:59,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [677906496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:37:59,904 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:37:59,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 23:37:59,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013945367] [2021-11-12 23:37:59,905 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:37:59,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:37:59,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:59,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:37:59,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:37:59,906 INFO L87 Difference]: Start difference. First operand 472 states and 596 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:38:00,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:00,482 INFO L93 Difference]: Finished difference Result 1026 states and 1310 transitions. [2021-11-12 23:38:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:00,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-12 23:38:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:00,488 INFO L225 Difference]: With dead ends: 1026 [2021-11-12 23:38:00,488 INFO L226 Difference]: Without dead ends: 748 [2021-11-12 23:38:00,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:38:00,490 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 233 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 498.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.88ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 536.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:00,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 765 Invalid, 19 Unknown, 0 Unchecked, 2.88ms Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 536.99ms Time] [2021-11-12 23:38:00,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-12 23:38:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 746. [2021-11-12 23:38:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 714 states have (on average 1.2478991596638656) internal successors, (891), 726 states have internal predecessors, (891), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (34), 19 states have call predecessors, (34), 27 states have call successors, (34) [2021-11-12 23:38:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 952 transitions. [2021-11-12 23:38:00,527 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 952 transitions. Word has length 255 [2021-11-12 23:38:00,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:00,528 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 952 transitions. [2021-11-12 23:38:00,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:38:00,529 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 952 transitions. [2021-11-12 23:38:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-12 23:38:00,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:00,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:00,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:00,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-12 23:38:00,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:00,939 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:00,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:00,940 INFO L85 PathProgramCache]: Analyzing trace with hash -105934868, now seen corresponding path program 1 times [2021-11-12 23:38:00,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:00,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837756478] [2021-11-12 23:38:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:00,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:00,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:00,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:00,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:38:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:01,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:01,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 23:38:02,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 23:38:02,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:02,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837756478] [2021-11-12 23:38:02,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837756478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:02,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1815486067] [2021-11-12 23:38:02,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:02,598 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:02,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:02,598 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:02,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 23:38:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:03,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:38:03,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-12 23:38:04,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-12 23:38:06,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1815486067] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:06,398 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:06,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 23:38:06,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192820541] [2021-11-12 23:38:06,398 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:06,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:06,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:38:06,400 INFO L87 Difference]: Start difference. First operand 746 states and 952 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:38:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:07,117 INFO L93 Difference]: Finished difference Result 1054 states and 1345 transitions. [2021-11-12 23:38:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:07,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 262 [2021-11-12 23:38:07,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:07,123 INFO L225 Difference]: With dead ends: 1054 [2021-11-12 23:38:07,123 INFO L226 Difference]: Without dead ends: 745 [2021-11-12 23:38:07,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:38:07,125 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 93 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 670.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.25ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 693.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:07,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 713 Invalid, 16 Unknown, 0 Unchecked, 2.25ms Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 693.62ms Time] [2021-11-12 23:38:07,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-11-12 23:38:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 743. [2021-11-12 23:38:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 712 states have (on average 1.2485955056179776) internal successors, (889), 724 states have internal predecessors, (889), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-12 23:38:07,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 947 transitions. [2021-11-12 23:38:07,157 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 947 transitions. Word has length 262 [2021-11-12 23:38:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:07,157 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 947 transitions. [2021-11-12 23:38:07,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:38:07,158 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 947 transitions. [2021-11-12 23:38:07,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-12 23:38:07,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:07,164 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:07,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-12 23:38:07,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-12 23:38:07,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:07,568 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:07,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2036261227, now seen corresponding path program 1 times [2021-11-12 23:38:07,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:07,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425863128] [2021-11-12 23:38:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:07,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:07,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:07,571 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:07,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:38:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:08,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 23:38:08,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:38:09,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:09,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425863128] [2021-11-12 23:38:09,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425863128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:09,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [804201847] [2021-11-12 23:38:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:09,252 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:09,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:09,253 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:09,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 23:38:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:09,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:38:09,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-12 23:38:10,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-12 23:38:10,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [804201847] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:10,746 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:10,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 7] imperfect sequences [5, 5] total 13 [2021-11-12 23:38:10,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391367450] [2021-11-12 23:38:10,747 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:10,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:38:10,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:38:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:38:10,749 INFO L87 Difference]: Start difference. First operand 743 states and 947 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:38:10,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:10,926 INFO L93 Difference]: Finished difference Result 961 states and 1255 transitions. [2021-11-12 23:38:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:10,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-12 23:38:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:10,934 INFO L225 Difference]: With dead ends: 961 [2021-11-12 23:38:10,934 INFO L226 Difference]: Without dead ends: 806 [2021-11-12 23:38:10,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:38:10,937 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 19 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.09ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:10,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 593 Invalid, 98 Unknown, 0 Unchecked, 2.09ms Time], IncrementalHoareTripleChecker [50 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 153.27ms Time] [2021-11-12 23:38:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-11-12 23:38:10,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 803. [2021-11-12 23:38:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 772 states have (on average 1.2292746113989637) internal successors, (949), 784 states have internal predecessors, (949), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-12 23:38:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1007 transitions. [2021-11-12 23:38:10,968 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1007 transitions. Word has length 279 [2021-11-12 23:38:10,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:10,969 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1007 transitions. [2021-11-12 23:38:10,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:38:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1007 transitions. [2021-11-12 23:38:10,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-12 23:38:10,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:10,973 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:11,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:11,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:11,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:11,397 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:11,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:11,397 INFO L85 PathProgramCache]: Analyzing trace with hash 650057833, now seen corresponding path program 1 times [2021-11-12 23:38:11,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:11,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204039002] [2021-11-12 23:38:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:11,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:11,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:11,400 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:11,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:38:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:12,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:12,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 23:38:12,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:38:13,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:13,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204039002] [2021-11-12 23:38:13,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204039002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:13,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1269503589] [2021-11-12 23:38:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:13,022 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:13,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:13,023 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:13,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 23:38:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:13,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:38:13,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-12 23:38:14,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:38:14,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1269503589] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:14,541 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:14,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-12 23:38:14,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077639705] [2021-11-12 23:38:14,542 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:14,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:38:14,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:14,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:38:14,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:38:14,544 INFO L87 Difference]: Start difference. First operand 803 states and 1007 transitions. Second operand has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 23:38:14,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:14,760 INFO L93 Difference]: Finished difference Result 1466 states and 1855 transitions. [2021-11-12 23:38:14,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:14,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 279 [2021-11-12 23:38:14,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:14,766 INFO L225 Difference]: With dead ends: 1466 [2021-11-12 23:38:14,766 INFO L226 Difference]: Without dead ends: 755 [2021-11-12 23:38:14,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:38:14,768 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 272 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.44ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 180.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:14,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 1778 Invalid, 111 Unknown, 0 Unchecked, 5.44ms Time], IncrementalHoareTripleChecker [22 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 180.06ms Time] [2021-11-12 23:38:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-12 23:38:14,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 752. [2021-11-12 23:38:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 721 states have (on average 1.1997226074895977) internal successors, (865), 733 states have internal predecessors, (865), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-12 23:38:14,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 923 transitions. [2021-11-12 23:38:14,815 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 923 transitions. Word has length 279 [2021-11-12 23:38:14,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:14,816 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 923 transitions. [2021-11-12 23:38:14,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 23:38:14,816 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 923 transitions. [2021-11-12 23:38:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-12 23:38:14,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:14,819 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:14,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:15,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:15,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:15,244 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:15,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:15,244 INFO L85 PathProgramCache]: Analyzing trace with hash 920558569, now seen corresponding path program 1 times [2021-11-12 23:38:15,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:15,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649684407] [2021-11-12 23:38:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:15,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:15,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:15,247 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:15,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:38:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:15,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:15,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 23:38:16,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:38:16,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:16,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649684407] [2021-11-12 23:38:16,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649684407] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:16,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [214245183] [2021-11-12 23:38:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:16,928 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:16,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:16,929 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:16,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 23:38:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:17,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:17,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-12 23:38:17,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-12 23:38:18,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [214245183] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:18,244 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:18,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-12 23:38:18,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606938691] [2021-11-12 23:38:18,245 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:18,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:38:18,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:18,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:38:18,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:38:18,246 INFO L87 Difference]: Start difference. First operand 752 states and 923 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:38:18,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:18,385 INFO L93 Difference]: Finished difference Result 931 states and 1165 transitions. [2021-11-12 23:38:18,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:18,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-12 23:38:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:18,390 INFO L225 Difference]: With dead ends: 931 [2021-11-12 23:38:18,390 INFO L226 Difference]: Without dead ends: 708 [2021-11-12 23:38:18,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:18,392 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 150 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.49ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:18,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 788 Invalid, 77 Unknown, 0 Unchecked, 2.49ms Time], IncrementalHoareTripleChecker [39 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 99.21ms Time] [2021-11-12 23:38:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-11-12 23:38:18,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 701. [2021-11-12 23:38:18,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 670 states have (on average 1.1656716417910449) internal successors, (781), 682 states have internal predecessors, (781), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-12 23:38:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 839 transitions. [2021-11-12 23:38:18,421 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 839 transitions. Word has length 279 [2021-11-12 23:38:18,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:18,421 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 839 transitions. [2021-11-12 23:38:18,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:38:18,422 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 839 transitions. [2021-11-12 23:38:18,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-12 23:38:18,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:18,425 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:18,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:18,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:18,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:18,833 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1465605129, now seen corresponding path program 1 times [2021-11-12 23:38:18,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:18,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673655798] [2021-11-12 23:38:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:18,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:18,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:18,836 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:18,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:38:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:19,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:19,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 23:38:19,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:38:20,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:20,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673655798] [2021-11-12 23:38:20,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673655798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:20,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [32362007] [2021-11-12 23:38:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:20,450 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:20,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:20,456 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:20,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 23:38:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:21,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:21,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 23:38:21,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:38:22,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [32362007] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:22,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414578819] [2021-11-12 23:38:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:22,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:22,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:22,397 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:38:22,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-12 23:38:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:23,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:23,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:38:23,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:38:24,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414578819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:24,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:38:24,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-12 23:38:24,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997126605] [2021-11-12 23:38:24,610 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:38:24,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:38:24,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:24,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:38:24,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:38:24,613 INFO L87 Difference]: Start difference. First operand 701 states and 839 transitions. Second operand has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:38:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:27,552 INFO L93 Difference]: Finished difference Result 2955 states and 3656 transitions. [2021-11-12 23:38:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:38:27,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 279 [2021-11-12 23:38:27,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:27,566 INFO L225 Difference]: With dead ends: 2955 [2021-11-12 23:38:27,567 INFO L226 Difference]: Without dead ends: 2301 [2021-11-12 23:38:27,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1677 GetRequests, 1658 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:38:27,570 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 2433 mSDsluCounter, 4439 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2368.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2484 SdHoareTripleChecker+Valid, 5221 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.95ms SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2610.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:27,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2484 Valid, 5221 Invalid, 708 Unknown, 0 Unchecked, 15.95ms Time], IncrementalHoareTripleChecker [223 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 2610.80ms Time] [2021-11-12 23:38:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-11-12 23:38:27,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1947. [2021-11-12 23:38:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1878 states have (on average 1.174653887113951) internal successors, (2206), 1890 states have internal predecessors, (2206), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-12 23:38:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2353 transitions. [2021-11-12 23:38:27,657 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2353 transitions. Word has length 279 [2021-11-12 23:38:27,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:27,657 INFO L470 AbstractCegarLoop]: Abstraction has 1947 states and 2353 transitions. [2021-11-12 23:38:27,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:38:27,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2353 transitions. [2021-11-12 23:38:27,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2021-11-12 23:38:27,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:27,668 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:27,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:27,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:28,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:28,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:28,282 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:28,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1647678185, now seen corresponding path program 2 times [2021-11-12 23:38:28,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:28,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676971023] [2021-11-12 23:38:28,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:38:28,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:28,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:28,287 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:28,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:38:29,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:38:29,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:38:29,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:38:29,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-12 23:38:31,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-12 23:38:32,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:32,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676971023] [2021-11-12 23:38:32,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676971023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:32,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [247703720] [2021-11-12 23:38:32,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:38:32,648 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:32,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:32,649 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:32,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 23:38:35,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:38:35,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:38:35,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:38:35,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-12 23:38:37,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-12 23:38:38,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [247703720] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:38,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260510118] [2021-11-12 23:38:38,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:38:38,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:38,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:38,429 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:38:38,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-12 23:38:39,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:38:39,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:38:39,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:38:39,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-12 23:38:40,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-12 23:38:42,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260510118] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:42,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:38:42,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-12 23:38:42,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328048368] [2021-11-12 23:38:42,254 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:38:42,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 23:38:42,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:42,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 23:38:42,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:38:42,257 INFO L87 Difference]: Start difference. First operand 1947 states and 2353 transitions. Second operand has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:38:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:43,636 INFO L93 Difference]: Finished difference Result 3873 states and 4886 transitions. [2021-11-12 23:38:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-12 23:38:43,637 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 679 [2021-11-12 23:38:43,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:43,649 INFO L225 Difference]: With dead ends: 3873 [2021-11-12 23:38:43,650 INFO L226 Difference]: Without dead ends: 1967 [2021-11-12 23:38:43,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4093 GetRequests, 4050 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 23:38:43,656 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 156 mSDsluCounter, 2342 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 458.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 2643 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.44ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 537.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:43,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 2643 Invalid, 386 Unknown, 0 Unchecked, 4.44ms Time], IncrementalHoareTripleChecker [89 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 537.92ms Time] [2021-11-12 23:38:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-11-12 23:38:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1959. [2021-11-12 23:38:43,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1890 states have (on average 1.1756613756613756) internal successors, (2222), 1902 states have internal predecessors, (2222), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-12 23:38:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 2369 transitions. [2021-11-12 23:38:43,736 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 2369 transitions. Word has length 679 [2021-11-12 23:38:43,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:43,736 INFO L470 AbstractCegarLoop]: Abstraction has 1959 states and 2369 transitions. [2021-11-12 23:38:43,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:38:43,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 2369 transitions. [2021-11-12 23:38:43,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-11-12 23:38:43,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:43,747 INFO L514 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:43,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:44,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:44,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:44,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:44,369 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:44,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:44,369 INFO L85 PathProgramCache]: Analyzing trace with hash -193391593, now seen corresponding path program 3 times [2021-11-12 23:38:44,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:44,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324047644] [2021-11-12 23:38:44,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:38:44,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:44,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:44,374 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:44,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81f7b058-3d17-4b0d-a7ca-865ca86f849e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process