./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:00:24,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:00:24,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:00:24,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:00:24,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:00:24,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:00:24,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:00:24,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:00:24,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:00:24,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:00:24,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:00:24,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:00:24,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:00:24,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:00:24,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:00:24,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:00:24,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:00:24,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:00:24,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:00:24,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:00:24,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:00:24,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:00:24,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:00:24,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:00:24,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:00:24,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:00:24,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:00:24,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:00:24,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:00:24,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:00:24,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:00:24,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:00:24,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:00:24,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:00:24,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:00:24,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:00:24,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:00:24,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:00:24,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:00:24,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:00:24,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:00:24,789 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:00:24,836 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:00:24,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:00:24,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:00:24,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:00:24,839 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:00:24,839 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:00:24,839 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:00:24,839 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:00:24,845 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:00:24,846 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:00:24,847 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:00:24,847 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:00:24,847 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:00:24,848 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:00:24,848 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:00:24,848 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:00:24,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:00:24,849 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:00:24,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:00:24,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:00:24,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:00:24,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:00:24,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:00:24,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:00:24,851 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:00:24,851 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:00:24,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:00:24,851 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:00:24,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:00:24,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:00:24,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:00:24,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:24,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:00:24,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:00:24,855 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:00:24,855 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:00:24,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:00:24,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:00:24,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:00:24,856 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:00:24,856 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_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 [2021-11-19 14:00:25,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:00:25,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:00:25,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:00:25,156 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:00:25,157 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:00:25,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2021-11-19 14:00:25,224 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/data/3dbe601bf/e273872c66934e6db775fddb1250d0d1/FLAGe21a43156 [2021-11-19 14:00:25,879 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:00:25,879 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2021-11-19 14:00:25,904 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/data/3dbe601bf/e273872c66934e6db775fddb1250d0d1/FLAGe21a43156 [2021-11-19 14:00:26,066 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/data/3dbe601bf/e273872c66934e6db775fddb1250d0d1 [2021-11-19 14:00:26,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:00:26,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:00:26,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:26,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:00:26,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:00:26,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:26" (1/1) ... [2021-11-19 14:00:26,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d2af0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:26, skipping insertion in model container [2021-11-19 14:00:26,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:26" (1/1) ... [2021-11-19 14:00:26,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:00:26,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:26,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c[78808,78821] [2021-11-19 14:00:26,583 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:26,597 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:00:26,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4dfb9407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:26, skipping insertion in model container [2021-11-19 14:00:26,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:26,598 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:00:26,600 INFO L158 Benchmark]: Toolchain (without parser) took 529.08ms. Allocated memory is still 104.9MB. Free memory was 71.6MB in the beginning and 69.4MB in the end (delta: 2.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 14:00:26,601 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 104.9MB. Free memory is still 61.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:00:26,602 INFO L158 Benchmark]: CACSL2BoogieTranslator took 525.65ms. Allocated memory is still 104.9MB. Free memory was 71.4MB in the beginning and 69.4MB in the end (delta: 2.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 14:00:26,604 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 104.9MB. Free memory is still 61.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 525.65ms. Allocated memory is still 104.9MB. Free memory was 71.4MB in the beginning and 69.4MB in the end (delta: 2.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: 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_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:00:28,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:00:28,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:00:28,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:00:28,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:00:28,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:00:28,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:00:28,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:00:28,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:00:28,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:00:28,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:00:28,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:00:28,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:00:29,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:00:29,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:00:29,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:00:29,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:00:29,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:00:29,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:00:29,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:00:29,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:00:29,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:00:29,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:00:29,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:00:29,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:00:29,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:00:29,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:00:29,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:00:29,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:00:29,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:00:29,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:00:29,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:00:29,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:00:29,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:00:29,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:00:29,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:00:29,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:00:29,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:00:29,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:00:29,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:00:29,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:00:29,054 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:00:29,104 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:00:29,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:00:29,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:00:29,106 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:00:29,106 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:00:29,106 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:00:29,106 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:00:29,107 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:00:29,107 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:00:29,107 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:00:29,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:00:29,110 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:00:29,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:00:29,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:00:29,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:00:29,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:00:29,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:00:29,111 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:00:29,111 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:00:29,111 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:00:29,112 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:00:29,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:00:29,112 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:00:29,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:00:29,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:00:29,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:00:29,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:00:29,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:29,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:00:29,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:00:29,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:00:29,114 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:00:29,114 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:29,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:00:29,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:00:29,115 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:00:29,115 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_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 [2021-11-19 14:00:29,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:00:29,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:00:29,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:00:29,516 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:00:29,517 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:00:29,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2021-11-19 14:00:29,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/data/a7bab5ad4/b5f84c0842844e118ec60d6edfeac6fd/FLAG43abd2b54 [2021-11-19 14:00:30,392 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:00:30,392 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2021-11-19 14:00:30,426 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/data/a7bab5ad4/b5f84c0842844e118ec60d6edfeac6fd/FLAG43abd2b54 [2021-11-19 14:00:30,583 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/data/a7bab5ad4/b5f84c0842844e118ec60d6edfeac6fd [2021-11-19 14:00:30,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:00:30,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:00:30,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:30,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:00:30,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:00:30,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:30" (1/1) ... [2021-11-19 14:00:30,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f9462e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:30, skipping insertion in model container [2021-11-19 14:00:30,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:30" (1/1) ... [2021-11-19 14:00:30,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:00:30,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:31,252 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c[78808,78821] [2021-11-19 14:00:31,275 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:31,308 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:00:31,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:31,489 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c[78808,78821] [2021-11-19 14:00:31,503 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:31,516 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:00:31,645 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c[78808,78821] [2021-11-19 14:00:31,651 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:31,675 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:00:31,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:31 WrapperNode [2021-11-19 14:00:31,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:31,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:00:31,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:00:31,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:00:31,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:31" (1/1) ... [2021-11-19 14:00:31,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:31" (1/1) ... [2021-11-19 14:00:31,794 INFO L137 Inliner]: procedures = 36, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 785 [2021-11-19 14:00:31,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:00:31,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:00:31,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:00:31,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:00:31,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:31" (1/1) ... [2021-11-19 14:00:31,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:31" (1/1) ... [2021-11-19 14:00:31,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:31" (1/1) ... [2021-11-19 14:00:31,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:31" (1/1) ... [2021-11-19 14:00:31,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:31" (1/1) ... [2021-11-19 14:00:31,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:31" (1/1) ... [2021-11-19 14:00:31,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:31" (1/1) ... [2021-11-19 14:00:31,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:00:31,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:00:31,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:00:31,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:00:31,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:31" (1/1) ... [2021-11-19 14:00:31,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:31,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:31,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:00:31,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:00:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:00:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:00:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:00:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:00:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:00:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:00:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:00:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:00:31,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:00:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:00:32,185 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:00:32,187 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:00:32,206 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 14:00:41,675 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-19 14:00:41,675 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-19 14:00:41,675 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:00:41,683 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:00:41,684 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:00:41,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:00:41 BoogieIcfgContainer [2021-11-19 14:00:41,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:00:41,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:00:41,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:00:41,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:00:41,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:00:30" (1/3) ... [2021-11-19 14:00:41,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5630f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:00:41, skipping insertion in model container [2021-11-19 14:00:41,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:31" (2/3) ... [2021-11-19 14:00:41,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5630f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:00:41, skipping insertion in model container [2021-11-19 14:00:41,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:00:41" (3/3) ... [2021-11-19 14:00:41,695 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.06.i.cil-2.c [2021-11-19 14:00:41,700 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:00:41,701 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:00:41,751 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:00:41,758 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:00:41,758 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:00:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 160 states have (on average 1.7375) internal successors, (278), 161 states have internal predecessors, (278), 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) [2021-11-19 14:00:41,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 14:00:41,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:41,798 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, 1, 1, 1, 1, 1] [2021-11-19 14:00:41,798 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:41,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:41,811 INFO L85 PathProgramCache]: Analyzing trace with hash 271453869, now seen corresponding path program 1 times [2021-11-19 14:00:41,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:41,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961103166] [2021-11-19 14:00:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:41,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:41,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:41,833 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:41,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:00:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:42,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:42,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:00:42,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:00:42,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:42,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961103166] [2021-11-19 14:00:42,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961103166] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:42,827 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:42,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:00:42,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759608396] [2021-11-19 14:00:42,830 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:42,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:42,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:42,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:42,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:42,865 INFO L87 Difference]: Start difference. First operand has 162 states, 160 states have (on average 1.7375) internal successors, (278), 161 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-11-19 14:00:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:43,272 INFO L93 Difference]: Finished difference Result 610 states and 1056 transitions. [2021-11-19 14:00:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:43,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 47 [2021-11-19 14:00:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:43,290 INFO L225 Difference]: With dead ends: 610 [2021-11-19 14:00:43,291 INFO L226 Difference]: Without dead ends: 419 [2021-11-19 14:00:43,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:43,299 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 404 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:43,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 667 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:00:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-19 14:00:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2021-11-19 14:00:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.5406698564593302) internal successors, (644), 418 states have internal predecessors, (644), 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) [2021-11-19 14:00:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 644 transitions. [2021-11-19 14:00:43,393 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 644 transitions. Word has length 47 [2021-11-19 14:00:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:43,394 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 644 transitions. [2021-11-19 14:00:43,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-11-19 14:00:43,395 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 644 transitions. [2021-11-19 14:00:43,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-19 14:00:43,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:43,409 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:00:43,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:43,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:43,621 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:43,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1390827129, now seen corresponding path program 1 times [2021-11-19 14:00:43,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:43,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031210109] [2021-11-19 14:00:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:43,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:43,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:43,626 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:43,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:00:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:43,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:00:44,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:00:44,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:44,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031210109] [2021-11-19 14:00:44,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031210109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:44,710 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:44,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:00:44,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654584713] [2021-11-19 14:00:44,710 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:44,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:44,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:44,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:44,713 INFO L87 Difference]: Start difference. First operand 419 states and 644 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2021-11-19 14:00:45,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:45,367 INFO L93 Difference]: Finished difference Result 960 states and 1506 transitions. [2021-11-19 14:00:45,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:45,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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 110 [2021-11-19 14:00:45,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:45,373 INFO L225 Difference]: With dead ends: 960 [2021-11-19 14:00:45,373 INFO L226 Difference]: Without dead ends: 687 [2021-11-19 14:00:45,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:45,377 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 315 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:45,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 721 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:00:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-11-19 14:00:45,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 687. [2021-11-19 14:00:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 1.5291545189504374) internal successors, (1049), 686 states have internal predecessors, (1049), 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) [2021-11-19 14:00:45,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1049 transitions. [2021-11-19 14:00:45,409 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1049 transitions. Word has length 110 [2021-11-19 14:00:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:45,410 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 1049 transitions. [2021-11-19 14:00:45,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2021-11-19 14:00:45,410 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1049 transitions. [2021-11-19 14:00:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-19 14:00:45,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:45,413 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:00:45,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:45,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:45,624 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:45,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:45,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1114584605, now seen corresponding path program 1 times [2021-11-19 14:00:45,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:45,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669926870] [2021-11-19 14:00:45,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:45,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:45,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:45,629 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:45,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:00:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:46,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 14:00:46,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 14:00:47,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:47,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669926870] [2021-11-19 14:00:47,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669926870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:47,059 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:47,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:00:47,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860350591] [2021-11-19 14:00:47,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:47,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:47,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:47,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:47,065 INFO L87 Difference]: Start difference. First operand 687 states and 1049 transitions. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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) [2021-11-19 14:00:47,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:47,713 INFO L93 Difference]: Finished difference Result 1499 states and 2319 transitions. [2021-11-19 14:00:47,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:47,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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 176 [2021-11-19 14:00:47,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:47,720 INFO L225 Difference]: With dead ends: 1499 [2021-11-19 14:00:47,720 INFO L226 Difference]: Without dead ends: 958 [2021-11-19 14:00:47,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:47,722 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 315 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:47,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 731 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:00:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-11-19 14:00:47,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 958. [2021-11-19 14:00:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 1.522466039707419) internal successors, (1457), 957 states have internal predecessors, (1457), 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) [2021-11-19 14:00:47,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1457 transitions. [2021-11-19 14:00:47,759 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1457 transitions. Word has length 176 [2021-11-19 14:00:47,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:47,760 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 1457 transitions. [2021-11-19 14:00:47,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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) [2021-11-19 14:00:47,760 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1457 transitions. [2021-11-19 14:00:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-19 14:00:47,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:47,764 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:47,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:47,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:47,980 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:47,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:47,981 INFO L85 PathProgramCache]: Analyzing trace with hash 824529479, now seen corresponding path program 1 times [2021-11-19 14:00:47,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:47,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003283853] [2021-11-19 14:00:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:47,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:47,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:47,983 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:47,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:00:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:48,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:48,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-19 14:00:49,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-19 14:00:49,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:49,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003283853] [2021-11-19 14:00:49,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003283853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:49,656 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:49,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:00:49,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940424564] [2021-11-19 14:00:49,656 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:49,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:49,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:49,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:49,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:49,658 INFO L87 Difference]: Start difference. First operand 958 states and 1457 transitions. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 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) [2021-11-19 14:00:50,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:50,421 INFO L93 Difference]: Finished difference Result 2039 states and 3130 transitions. [2021-11-19 14:00:50,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:50,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 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 242 [2021-11-19 14:00:50,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:50,429 INFO L225 Difference]: With dead ends: 2039 [2021-11-19 14:00:50,430 INFO L226 Difference]: Without dead ends: 1227 [2021-11-19 14:00:50,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:50,432 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 323 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:50,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 729 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:00:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-11-19 14:00:50,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1227. [2021-11-19 14:00:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 1.5171288743882545) internal successors, (1860), 1226 states have internal predecessors, (1860), 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) [2021-11-19 14:00:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1860 transitions. [2021-11-19 14:00:50,479 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1860 transitions. Word has length 242 [2021-11-19 14:00:50,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:50,480 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 1860 transitions. [2021-11-19 14:00:50,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 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) [2021-11-19 14:00:50,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1860 transitions. [2021-11-19 14:00:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-19 14:00:50,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:50,488 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 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] [2021-11-19 14:00:50,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:50,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:50,704 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:50,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:50,705 INFO L85 PathProgramCache]: Analyzing trace with hash 220345402, now seen corresponding path program 1 times [2021-11-19 14:00:50,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:50,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581361911] [2021-11-19 14:00:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:50,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:50,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:50,709 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:50,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:00:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:51,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:51,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-19 14:00:51,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-19 14:00:52,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:52,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581361911] [2021-11-19 14:00:52,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581361911] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:52,725 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:52,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:00:52,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399505430] [2021-11-19 14:00:52,728 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:52,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:52,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:52,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:52,730 INFO L87 Difference]: Start difference. First operand 1227 states and 1860 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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) [2021-11-19 14:00:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:53,421 INFO L93 Difference]: Finished difference Result 2577 states and 3934 transitions. [2021-11-19 14:00:53,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:53,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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 316 [2021-11-19 14:00:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:53,431 INFO L225 Difference]: With dead ends: 2577 [2021-11-19 14:00:53,431 INFO L226 Difference]: Without dead ends: 1496 [2021-11-19 14:00:53,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:53,435 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 317 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:53,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 729 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:00:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-11-19 14:00:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1496. [2021-11-19 14:00:53,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 1.5123745819397993) internal successors, (2261), 1495 states have internal predecessors, (2261), 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) [2021-11-19 14:00:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2261 transitions. [2021-11-19 14:00:53,498 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2261 transitions. Word has length 316 [2021-11-19 14:00:53,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:53,499 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 2261 transitions. [2021-11-19 14:00:53,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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) [2021-11-19 14:00:53,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2261 transitions. [2021-11-19 14:00:53,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-11-19 14:00:53,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:53,509 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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] [2021-11-19 14:00:53,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:53,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:53,727 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:53,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:53,728 INFO L85 PathProgramCache]: Analyzing trace with hash -99567682, now seen corresponding path program 1 times [2021-11-19 14:00:53,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:53,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441713783] [2021-11-19 14:00:53,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:53,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:53,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:53,730 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:53,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:00:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:54,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:54,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 727 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-11-19 14:00:55,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 727 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-11-19 14:00:56,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:56,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441713783] [2021-11-19 14:00:56,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441713783] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:56,038 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:56,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:00:56,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325490703] [2021-11-19 14:00:56,038 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:56,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:56,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:56,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:56,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:56,040 INFO L87 Difference]: Start difference. First operand 1496 states and 2261 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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) [2021-11-19 14:00:56,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:56,743 INFO L93 Difference]: Finished difference Result 3113 states and 4731 transitions. [2021-11-19 14:00:56,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:56,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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 390 [2021-11-19 14:00:56,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:56,754 INFO L225 Difference]: With dead ends: 3113 [2021-11-19 14:00:56,754 INFO L226 Difference]: Without dead ends: 1763 [2021-11-19 14:00:56,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:56,757 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 317 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:56,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 728 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:00:56,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-11-19 14:00:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1763. [2021-11-19 14:00:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 1.5085130533484676) internal successors, (2658), 1762 states have internal predecessors, (2658), 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) [2021-11-19 14:00:56,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2658 transitions. [2021-11-19 14:00:56,821 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2658 transitions. Word has length 390 [2021-11-19 14:00:56,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:56,822 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 2658 transitions. [2021-11-19 14:00:56,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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) [2021-11-19 14:00:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2658 transitions. [2021-11-19 14:00:56,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2021-11-19 14:00:56,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:56,835 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 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] [2021-11-19 14:00:56,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:57,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:57,056 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:57,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:57,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1436869466, now seen corresponding path program 1 times [2021-11-19 14:00:57,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:57,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511005894] [2021-11-19 14:00:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:57,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:57,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:57,061 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:57,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:00:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:57,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:57,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 1045 proven. 0 refuted. 0 times theorem prover too weak. 791 trivial. 0 not checked. [2021-11-19 14:00:58,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 1045 proven. 0 refuted. 0 times theorem prover too weak. 791 trivial. 0 not checked. [2021-11-19 14:00:59,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:59,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511005894] [2021-11-19 14:00:59,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511005894] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:59,582 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:59,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:00:59,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871744306] [2021-11-19 14:00:59,583 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:59,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:59,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:59,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:59,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:59,585 INFO L87 Difference]: Start difference. First operand 1763 states and 2658 transitions. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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) [2021-11-19 14:01:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:00,245 INFO L93 Difference]: Finished difference Result 3648 states and 5525 transitions. [2021-11-19 14:01:00,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:00,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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 463 [2021-11-19 14:01:00,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:00,257 INFO L225 Difference]: With dead ends: 3648 [2021-11-19 14:01:00,258 INFO L226 Difference]: Without dead ends: 2031 [2021-11-19 14:01:00,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 922 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:00,264 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 325 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:00,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 725 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:01:00,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-11-19 14:01:00,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 2031. [2021-11-19 14:01:00,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 1.5044334975369458) internal successors, (3054), 2030 states have internal predecessors, (3054), 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) [2021-11-19 14:01:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 3054 transitions. [2021-11-19 14:01:00,360 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 3054 transitions. Word has length 463 [2021-11-19 14:01:00,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:00,361 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 3054 transitions. [2021-11-19 14:01:00,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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) [2021-11-19 14:01:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 3054 transitions. [2021-11-19 14:01:00,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2021-11-19 14:01:00,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:00,375 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:01:00,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:00,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:00,601 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:00,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:00,603 INFO L85 PathProgramCache]: Analyzing trace with hash -841726051, now seen corresponding path program 1 times [2021-11-19 14:01:00,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:00,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081011852] [2021-11-19 14:01:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:00,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:00,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:00,607 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:00,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:01:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:01,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:01:01,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2217 backedges. 1208 proven. 0 refuted. 0 times theorem prover too weak. 1009 trivial. 0 not checked. [2021-11-19 14:01:02,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2217 backedges. 1208 proven. 0 refuted. 0 times theorem prover too weak. 1009 trivial. 0 not checked. [2021-11-19 14:01:03,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:03,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081011852] [2021-11-19 14:01:03,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081011852] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:03,348 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:03,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:01:03,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065029340] [2021-11-19 14:01:03,349 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:03,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:03,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:03,350 INFO L87 Difference]: Start difference. First operand 2031 states and 3054 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 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) [2021-11-19 14:01:03,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:03,903 INFO L93 Difference]: Finished difference Result 4184 states and 6315 transitions. [2021-11-19 14:01:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:03,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 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 509 [2021-11-19 14:01:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:03,917 INFO L225 Difference]: With dead ends: 4184 [2021-11-19 14:01:03,917 INFO L226 Difference]: Without dead ends: 2299 [2021-11-19 14:01:03,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1014 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:03,921 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 321 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:03,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 729 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:01:03,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2021-11-19 14:01:04,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 2299. [2021-11-19 14:01:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 1.5004351610095736) internal successors, (3448), 2298 states have internal predecessors, (3448), 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) [2021-11-19 14:01:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3448 transitions. [2021-11-19 14:01:04,032 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3448 transitions. Word has length 509 [2021-11-19 14:01:04,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:04,033 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 3448 transitions. [2021-11-19 14:01:04,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 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) [2021-11-19 14:01:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3448 transitions. [2021-11-19 14:01:04,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2021-11-19 14:01:04,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:04,055 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:04,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:04,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:04,283 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:04,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:04,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1840380921, now seen corresponding path program 1 times [2021-11-19 14:01:04,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:04,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353774185] [2021-11-19 14:01:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:04,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:04,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:04,286 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:04,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:01:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:05,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:01:05,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3019 backedges. 1631 proven. 0 refuted. 0 times theorem prover too weak. 1388 trivial. 0 not checked. [2021-11-19 14:01:06,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3019 backedges. 1631 proven. 0 refuted. 0 times theorem prover too weak. 1388 trivial. 0 not checked. [2021-11-19 14:01:07,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:07,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353774185] [2021-11-19 14:01:07,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353774185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:07,389 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:07,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:01:07,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242465469] [2021-11-19 14:01:07,390 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:07,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:07,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:07,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:07,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:07,392 INFO L87 Difference]: Start difference. First operand 2299 states and 3448 transitions. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2021-11-19 14:01:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:08,016 INFO L93 Difference]: Finished difference Result 4721 states and 7103 transitions. [2021-11-19 14:01:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:08,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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 584 [2021-11-19 14:01:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:08,031 INFO L225 Difference]: With dead ends: 4721 [2021-11-19 14:01:08,031 INFO L226 Difference]: Without dead ends: 2568 [2021-11-19 14:01:08,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1166 GetRequests, 1164 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:08,035 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 323 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:08,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 731 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:01:08,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-11-19 14:01:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2568. [2021-11-19 14:01:08,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 1.4966887417218544) internal successors, (3842), 2567 states have internal predecessors, (3842), 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) [2021-11-19 14:01:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3842 transitions. [2021-11-19 14:01:08,135 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3842 transitions. Word has length 584 [2021-11-19 14:01:08,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:08,136 INFO L470 AbstractCegarLoop]: Abstraction has 2568 states and 3842 transitions. [2021-11-19 14:01:08,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2021-11-19 14:01:08,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3842 transitions. [2021-11-19 14:01:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 660 [2021-11-19 14:01:08,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:08,157 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:08,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:08,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:08,380 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:08,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1773637963, now seen corresponding path program 1 times [2021-11-19 14:01:08,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:08,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375853851] [2021-11-19 14:01:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:08,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:08,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:08,384 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:08,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:01:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:09,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:01:09,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3958 backedges. 2122 proven. 0 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2021-11-19 14:01:10,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3958 backedges. 2122 proven. 0 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2021-11-19 14:01:11,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:11,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375853851] [2021-11-19 14:01:11,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375853851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:11,721 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:11,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:01:11,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950149309] [2021-11-19 14:01:11,722 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:11,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:01:11,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:11,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:01:11,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:01:11,725 INFO L87 Difference]: Start difference. First operand 2568 states and 3842 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2021-11-19 14:01:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:12,325 INFO L93 Difference]: Finished difference Result 5120 states and 7675 transitions. [2021-11-19 14:01:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:01:12,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 659 [2021-11-19 14:01:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:12,342 INFO L225 Difference]: With dead ends: 5120 [2021-11-19 14:01:12,342 INFO L226 Difference]: Without dead ends: 2698 [2021-11-19 14:01:12,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1316 GetRequests, 1315 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:01:12,346 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 152 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:12,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 593 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:01:12,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2021-11-19 14:01:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 2698. [2021-11-19 14:01:12,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2698 states, 2697 states have (on average 1.4946236559139785) internal successors, (4031), 2697 states have internal predecessors, (4031), 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) [2021-11-19 14:01:12,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2698 states to 2698 states and 4031 transitions. [2021-11-19 14:01:12,456 INFO L78 Accepts]: Start accepts. Automaton has 2698 states and 4031 transitions. Word has length 659 [2021-11-19 14:01:12,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:12,457 INFO L470 AbstractCegarLoop]: Abstraction has 2698 states and 4031 transitions. [2021-11-19 14:01:12,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2021-11-19 14:01:12,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2698 states and 4031 transitions. [2021-11-19 14:01:12,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2021-11-19 14:01:12,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:12,467 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 17, 17, 16, 16, 15, 15, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:12,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:12,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:12,693 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:12,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1020212381, now seen corresponding path program 1 times [2021-11-19 14:01:12,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:12,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256716192] [2021-11-19 14:01:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:12,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:12,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:12,697 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:12,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:01:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:13,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1461 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:01:13,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4496 backedges. 2482 proven. 0 refuted. 0 times theorem prover too weak. 2014 trivial. 0 not checked. [2021-11-19 14:01:14,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4496 backedges. 2482 proven. 0 refuted. 0 times theorem prover too weak. 2014 trivial. 0 not checked. [2021-11-19 14:01:16,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:16,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256716192] [2021-11-19 14:01:16,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256716192] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:16,017 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:16,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:01:16,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577470476] [2021-11-19 14:01:16,018 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:16,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:16,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:16,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:16,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:16,020 INFO L87 Difference]: Start difference. First operand 2698 states and 4031 transitions. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 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) [2021-11-19 14:01:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:16,643 INFO L93 Difference]: Finished difference Result 5513 states and 8260 transitions. [2021-11-19 14:01:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:16,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 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 698 [2021-11-19 14:01:16,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:16,660 INFO L225 Difference]: With dead ends: 5513 [2021-11-19 14:01:16,660 INFO L226 Difference]: Without dead ends: 2961 [2021-11-19 14:01:16,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1394 GetRequests, 1392 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:16,665 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 321 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:16,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 728 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:01:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-11-19 14:01:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2961. [2021-11-19 14:01:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2960 states have (on average 1.491891891891892) internal successors, (4416), 2960 states have internal predecessors, (4416), 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) [2021-11-19 14:01:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 4416 transitions. [2021-11-19 14:01:16,787 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 4416 transitions. Word has length 698 [2021-11-19 14:01:16,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:16,788 INFO L470 AbstractCegarLoop]: Abstraction has 2961 states and 4416 transitions. [2021-11-19 14:01:16,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 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) [2021-11-19 14:01:16,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 4416 transitions. [2021-11-19 14:01:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2021-11-19 14:01:16,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:16,799 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:16,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:17,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:17,020 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:17,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:17,020 INFO L85 PathProgramCache]: Analyzing trace with hash 636236789, now seen corresponding path program 1 times [2021-11-19 14:01:17,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:17,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313565109] [2021-11-19 14:01:17,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:17,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:17,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:17,028 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:17,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:01:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:55,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:55,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:56,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:56,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:56,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:56,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:01:56,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:01:56,520 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-19 14:01:56,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-19 14:01:56,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:01:56,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:01:56,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:01:57,062 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:01:57,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-19 14:01:59,606 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:01:59,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-19 14:02:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 2985 proven. 0 refuted. 0 times theorem prover too weak. 2717 trivial. 0 not checked. [2021-11-19 14:02:00,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 2985 proven. 0 refuted. 0 times theorem prover too weak. 2717 trivial. 0 not checked. [2021-11-19 14:02:02,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:02,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313565109] [2021-11-19 14:02:02,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313565109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:02,527 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:02,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:02:02,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346749487] [2021-11-19 14:02:02,527 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:02,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:02:02,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:02,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:02:02,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:02:02,530 INFO L87 Difference]: Start difference. First operand 2961 states and 4416 transitions. Second operand has 7 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 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) [2021-11-19 14:02:04,558 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:02:06,565 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:02:09,811 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:02:18,787 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:02:22,936 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:02:24,335 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:02:25,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:02:34,406 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:02:39,074 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:02:46,725 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:02:48,971 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:03:00,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:00,565 INFO L93 Difference]: Finished difference Result 13111 states and 19622 transitions. [2021-11-19 14:03:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:03:00,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 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 782 [2021-11-19 14:03:00,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:00,629 INFO L225 Difference]: With dead ends: 13111 [2021-11-19 14:03:00,629 INFO L226 Difference]: Without dead ends: 10160 [2021-11-19 14:03:00,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1565 GetRequests, 1556 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:03:00,635 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 400 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 85 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:00,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 1181 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 922 Invalid, 2 Unknown, 0 Unchecked, 57.5s Time] [2021-11-19 14:03:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10160 states. [2021-11-19 14:03:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10160 to 3901. [2021-11-19 14:03:00,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 1.5707692307692307) internal successors, (6126), 3900 states have internal predecessors, (6126), 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) [2021-11-19 14:03:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 6126 transitions. [2021-11-19 14:03:00,954 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 6126 transitions. Word has length 782 [2021-11-19 14:03:00,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:00,955 INFO L470 AbstractCegarLoop]: Abstraction has 3901 states and 6126 transitions. [2021-11-19 14:03:00,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 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) [2021-11-19 14:03:00,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 6126 transitions. [2021-11-19 14:03:00,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2021-11-19 14:03:00,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:00,969 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:01,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:01,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:01,192 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:01,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1585771787, now seen corresponding path program 1 times [2021-11-19 14:03:01,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:01,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578614293] [2021-11-19 14:03:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:01,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:01,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:01,198 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:01,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:06:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:20,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:06:20,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:20,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 14:06:20,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 14:06:20,532 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:06:20,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 14:06:20,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-19 14:06:21,110 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-19 14:06:21,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 601 treesize of output 573 [2021-11-19 14:06:21,209 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-19 14:06:21,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-19 14:06:21,221 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:06:21,223 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 14:06:21,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-19 14:06:21,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 101 [2021-11-19 14:06:21,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-19 14:06:21,522 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-19 14:06:21,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-19 14:06:21,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:21,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-19 14:06:21,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-19 14:06:21,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-19 14:06:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5702 trivial. 0 not checked. [2021-11-19 14:06:23,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:25,741 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:06:25,744 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-19 14:06:25,749 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:06:25,751 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-19 14:06:25,909 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:06:25,919 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-19 14:06:25,926 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:06:25,928 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-19 14:06:25,951 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:06:25,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-19 14:06:25,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:06:25,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-19 14:06:25,985 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:06:25,989 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-19 14:06:26,016 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:06:26,020 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-19 14:06:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5702 trivial. 0 not checked. [2021-11-19 14:06:26,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:26,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578614293] [2021-11-19 14:06:26,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578614293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:26,517 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:26,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:06:26,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817099591] [2021-11-19 14:06:26,518 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:26,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:06:26,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:26,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:06:26,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:06:26,520 INFO L87 Difference]: Start difference. First operand 3901 states and 6126 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 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) [2021-11-19 14:06:28,549 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:30,557 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:33,099 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:36,497 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:42,619 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:43,659 INFO L93 Difference]: Finished difference Result 7799 states and 12248 transitions. [2021-11-19 14:06:43,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:06:43,661 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 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 782 [2021-11-19 14:06:43,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:43,670 INFO L225 Difference]: With dead ends: 7799 [2021-11-19 14:06:43,670 INFO L226 Difference]: Without dead ends: 3901 [2021-11-19 14:06:43,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1564 GetRequests, 1555 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:06:43,677 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 12 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:43,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 942 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 2 Unknown, 59 Unchecked, 16.9s Time] [2021-11-19 14:06:43,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2021-11-19 14:06:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 3901. [2021-11-19 14:06:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 1.5705128205128205) internal successors, (6125), 3900 states have internal predecessors, (6125), 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) [2021-11-19 14:06:43,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 6125 transitions. [2021-11-19 14:06:43,932 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 6125 transitions. Word has length 782 [2021-11-19 14:06:43,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:43,933 INFO L470 AbstractCegarLoop]: Abstraction has 3901 states and 6125 transitions. [2021-11-19 14:06:43,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 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) [2021-11-19 14:06:43,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 6125 transitions. [2021-11-19 14:06:43,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2021-11-19 14:06:43,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:43,948 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:44,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-19 14:06:44,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:44,168 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:06:44,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:44,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1231230387, now seen corresponding path program 1 times [2021-11-19 14:06:44,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:44,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836642220] [2021-11-19 14:06:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:44,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:44,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:44,173 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:44,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:09:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:08,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:09:08,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:08,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:08,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:08,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:08,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:08,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:08,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:09:08,278 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:09:08,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-19 14:09:08,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:09:08,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:09:08,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:09:08,660 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:09:08,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-19 14:09:10,110 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:09:10,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-19 14:09:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 874 proven. 0 refuted. 0 times theorem prover too weak. 4828 trivial. 0 not checked. [2021-11-19 14:09:11,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 874 proven. 0 refuted. 0 times theorem prover too weak. 4828 trivial. 0 not checked. [2021-11-19 14:09:13,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:13,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836642220] [2021-11-19 14:09:13,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836642220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:13,797 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:13,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:09:13,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567933400] [2021-11-19 14:09:13,797 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:13,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:09:13,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:13,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:09:13,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:09:13,799 INFO L87 Difference]: Start difference. First operand 3901 states and 6125 transitions. Second operand has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 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) [2021-11-19 14:09:15,820 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:18,127 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:19,814 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:27,586 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:29,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:33,582 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:38,102 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:46,281 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:48,215 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:50,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:55,166 INFO L93 Difference]: Finished difference Result 12953 states and 20001 transitions. [2021-11-19 14:09:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:09:55,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 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 782 [2021-11-19 14:09:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:55,188 INFO L225 Difference]: With dead ends: 12953 [2021-11-19 14:09:55,189 INFO L226 Difference]: Without dead ends: 9062 [2021-11-19 14:09:55,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1564 GetRequests, 1556 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:09:55,196 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 304 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 76 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:55,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 840 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 648 Invalid, 3 Unknown, 0 Unchecked, 40.9s Time] [2021-11-19 14:09:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9062 states. [2021-11-19 14:09:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9062 to 4933. [2021-11-19 14:09:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4933 states, 4932 states have (on average 1.6078669910786698) internal successors, (7930), 4932 states have internal predecessors, (7930), 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) [2021-11-19 14:09:55,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4933 states to 4933 states and 7930 transitions. [2021-11-19 14:09:55,605 INFO L78 Accepts]: Start accepts. Automaton has 4933 states and 7930 transitions. Word has length 782 [2021-11-19 14:09:55,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:55,606 INFO L470 AbstractCegarLoop]: Abstraction has 4933 states and 7930 transitions. [2021-11-19 14:09:55,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 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) [2021-11-19 14:09:55,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4933 states and 7930 transitions. [2021-11-19 14:09:55,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2021-11-19 14:09:55,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:55,625 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:55,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:55,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:55,852 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:09:55,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:55,853 INFO L85 PathProgramCache]: Analyzing trace with hash 267707701, now seen corresponding path program 1 times [2021-11-19 14:09:55,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:55,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685606099] [2021-11-19 14:09:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:09:55,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:55,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:55,861 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:55,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf8e95ef-c1a2-417e-879a-33c40e733a60/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process