./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.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_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/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_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/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_a180c9e0-4578-4636-ac37-d760d676b8c7/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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:50:21,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:50:21,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:50:21,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:50:21,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:50:21,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:50:21,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:50:21,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:50:21,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:50:21,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:50:21,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:50:21,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:50:21,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:50:21,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:50:21,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:50:21,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:50:21,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:50:21,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:50:21,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:50:21,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:50:21,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:50:21,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:50:21,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:50:21,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:50:21,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:50:21,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:50:21,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:50:21,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:50:21,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:50:21,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:50:21,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:50:21,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:50:21,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:50:21,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:50:21,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:50:21,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:50:21,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:50:21,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:50:21,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:50:21,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:50:21,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:50:21,735 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:50:21,777 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:50:21,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:50:21,779 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:50:21,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:50:21,780 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:50:21,780 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:50:21,780 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:50:21,781 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:50:21,781 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:50:21,781 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:50:21,782 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:50:21,782 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:50:21,783 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:50:21,783 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:50:21,783 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:50:21,783 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:50:21,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:50:21,784 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:50:21,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:50:21,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:50:21,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:50:21,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:50:21,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:50:21,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:50:21,786 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:50:21,786 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:50:21,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:50:21,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:50:21,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:50:21,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:50:21,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:50:21,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:50:21,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:50:21,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:50:21,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:50:21,790 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:50:21,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:50:21,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:50:21,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:50:21,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:50:21,791 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_a180c9e0-4578-4636-ac37-d760d676b8c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc [2021-11-19 15:50:22,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:50:22,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:50:22,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:50:22,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:50:22,130 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:50:22,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-11-19 15:50:22,203 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/data/6221ee9bd/491aa0da4cb2405fb1661d521f7ba6a4/FLAG3d30795f3 [2021-11-19 15:50:22,772 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:50:22,773 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-11-19 15:50:22,787 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/data/6221ee9bd/491aa0da4cb2405fb1661d521f7ba6a4/FLAG3d30795f3 [2021-11-19 15:50:23,108 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/data/6221ee9bd/491aa0da4cb2405fb1661d521f7ba6a4 [2021-11-19 15:50:23,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:50:23,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:50:23,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:23,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:50:23,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:50:23,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:23" (1/1) ... [2021-11-19 15:50:23,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@358e0ec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:23, skipping insertion in model container [2021-11-19 15:50:23,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:23" (1/1) ... [2021-11-19 15:50:23,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:50:23,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:23,431 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_a180c9e0-4578-4636-ac37-d760d676b8c7/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2021-11-19 15:50:23,449 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:23,462 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 15:50:23,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@386f4f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:23, skipping insertion in model container [2021-11-19 15:50:23,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:23,463 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:50:23,466 INFO L158 Benchmark]: Toolchain (without parser) took 352.59ms. Allocated memory is still 83.9MB. Free memory was 43.8MB in the beginning and 61.4MB in the end (delta: -17.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-19 15:50:23,467 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 83.9MB. Free memory is still 60.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:50:23,470 INFO L158 Benchmark]: CACSL2BoogieTranslator took 349.83ms. Allocated memory is still 83.9MB. Free memory was 43.6MB in the beginning and 61.4MB in the end (delta: -17.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-19 15:50:23,472 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 83.9MB. Free memory is still 60.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 349.83ms. Allocated memory is still 83.9MB. Free memory was 43.6MB in the beginning and 61.4MB in the end (delta: -17.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: 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_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/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_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/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_a180c9e0-4578-4636-ac37-d760d676b8c7/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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:50:25,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:50:25,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:50:25,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:50:25,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:50:25,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:50:25,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:50:25,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:50:25,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:50:25,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:50:25,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:50:25,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:50:25,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:50:25,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:50:25,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:50:25,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:50:25,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:50:25,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:50:25,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:50:25,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:50:25,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:50:25,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:50:25,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:50:25,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:50:25,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:50:25,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:50:25,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:50:25,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:50:25,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:50:25,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:50:25,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:50:25,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:50:25,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:50:25,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:50:25,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:50:25,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:50:26,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:50:26,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:50:26,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:50:26,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:50:26,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:50:26,005 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 15:50:26,045 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:50:26,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:50:26,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:50:26,047 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:50:26,047 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:50:26,048 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:50:26,048 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:50:26,048 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:50:26,048 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:50:26,049 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:50:26,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:50:26,050 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:50:26,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:50:26,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:50:26,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:50:26,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:50:26,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:50:26,051 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:50:26,051 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:50:26,052 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:50:26,052 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:50:26,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:50:26,052 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:50:26,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:50:26,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:50:26,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:50:26,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:50:26,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:50:26,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:50:26,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:50:26,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:50:26,054 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:50:26,055 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:26,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:50:26,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:50:26,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:50:26,056 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_a180c9e0-4578-4636-ac37-d760d676b8c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc [2021-11-19 15:50:26,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:50:26,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:50:26,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:50:26,448 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:50:26,451 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:50:26,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-11-19 15:50:26,539 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/data/93bea1d92/b1aa6c4c183b4d5194b7b8075fa4cc2f/FLAGd691bd1ea [2021-11-19 15:50:27,103 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:50:27,104 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-11-19 15:50:27,114 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/data/93bea1d92/b1aa6c4c183b4d5194b7b8075fa4cc2f/FLAGd691bd1ea [2021-11-19 15:50:27,437 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/data/93bea1d92/b1aa6c4c183b4d5194b7b8075fa4cc2f [2021-11-19 15:50:27,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:50:27,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:50:27,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:27,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:50:27,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:50:27,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:27" (1/1) ... [2021-11-19 15:50:27,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43eaad4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:27, skipping insertion in model container [2021-11-19 15:50:27,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:27" (1/1) ... [2021-11-19 15:50:27,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:50:27,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:27,806 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_a180c9e0-4578-4636-ac37-d760d676b8c7/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2021-11-19 15:50:27,824 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:27,846 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:50:27,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:27,887 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_a180c9e0-4578-4636-ac37-d760d676b8c7/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2021-11-19 15:50:27,905 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:27,914 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:50:27,965 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_a180c9e0-4578-4636-ac37-d760d676b8c7/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2021-11-19 15:50:27,971 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:28,001 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:50:28,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28 WrapperNode [2021-11-19 15:50:28,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:28,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:50:28,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:50:28,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:50:28,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,075 INFO L137 Inliner]: procedures = 28, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 120 [2021-11-19 15:50:28,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:50:28,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:50:28,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:50:28,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:50:28,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:50:28,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:50:28,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:50:28,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:50:28,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:50:28,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:50:28,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:50:28,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:50:28,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:50:28,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:50:28,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 15:50:28,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 15:50:28,251 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-19 15:50:28,251 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-19 15:50:28,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-19 15:50:28,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-19 15:50:28,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-19 15:50:28,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-19 15:50:28,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-19 15:50:28,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-19 15:50:28,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 15:50:28,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:50:28,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:50:28,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 15:50:28,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 15:50:28,255 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-19 15:50:28,369 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:50:28,371 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:50:28,774 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:50:28,841 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:50:28,841 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-19 15:50:28,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:50:28 BoogieIcfgContainer [2021-11-19 15:50:28,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:50:28,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:50:28,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:50:28,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:50:28,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:50:27" (1/3) ... [2021-11-19 15:50:28,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c53eaee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:50:28, skipping insertion in model container [2021-11-19 15:50:28,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (2/3) ... [2021-11-19 15:50:28,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c53eaee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:50:28, skipping insertion in model container [2021-11-19 15:50:28,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:50:28" (3/3) ... [2021-11-19 15:50:28,851 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2021-11-19 15:50:28,856 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-19 15:50:28,856 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:50:28,857 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:50:28,857 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-19 15:50:28,950 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,951 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,951 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,951 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,951 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,952 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,952 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,952 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,952 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,952 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,953 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,953 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,953 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,953 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,954 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,954 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,954 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,954 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,955 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,955 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,955 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,955 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,955 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,955 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,956 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,956 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,956 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,956 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,957 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,957 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,957 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,957 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,957 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,958 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,958 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,958 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,958 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,958 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,959 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,959 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,959 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,959 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,960 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,960 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,960 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,960 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,961 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,961 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,961 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,961 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,961 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,961 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,962 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,962 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,962 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,962 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,963 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,963 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,963 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,963 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,963 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,964 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,964 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,964 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,964 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,964 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,964 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,965 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,965 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,965 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,965 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,965 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,966 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,966 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,966 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,966 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,966 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,967 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,967 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,967 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,967 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,967 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,968 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,968 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,977 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,977 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,978 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,979 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,979 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,980 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,980 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,980 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,980 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 15:50:28,983 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-19 15:50:29,027 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:50:29,033 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 15:50:29,033 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-19 15:50:29,049 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-19 15:50:29,061 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 185 transitions, 394 flow [2021-11-19 15:50:29,064 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 185 transitions, 394 flow [2021-11-19 15:50:29,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 179 places, 185 transitions, 394 flow [2021-11-19 15:50:29,198 INFO L129 PetriNetUnfolder]: 16/182 cut-off events. [2021-11-19 15:50:29,198 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-19 15:50:29,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 182 events. 16/182 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 116 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 141. Up to 3 conditions per place. [2021-11-19 15:50:29,209 INFO L116 LiptonReduction]: Number of co-enabled transitions 1720 [2021-11-19 15:50:47,390 INFO L131 LiptonReduction]: Checked pairs total: 2405 [2021-11-19 15:50:47,390 INFO L133 LiptonReduction]: Total number of compositions: 183 [2021-11-19 15:50:47,414 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 90 flow [2021-11-19 15:50:47,440 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 172 states, 171 states have (on average 3.3567251461988303) internal successors, (574), 171 states have internal predecessors, (574), 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 15:50:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 172 states, 171 states have (on average 3.3567251461988303) internal successors, (574), 171 states have internal predecessors, (574), 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 15:50:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 15:50:47,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:47,456 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] [2021-11-19 15:50:47,457 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:50:47,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:47,462 INFO L85 PathProgramCache]: Analyzing trace with hash -611292219, now seen corresponding path program 1 times [2021-11-19 15:50:47,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:47,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214177541] [2021-11-19 15:50:47,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:47,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:47,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:47,478 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:47,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:50:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:47,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:50:47,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:48,180 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 15:50:48,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:48,448 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 15:50:48,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:48,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214177541] [2021-11-19 15:50:48,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214177541] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:48,450 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:48,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-19 15:50:48,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715396522] [2021-11-19 15:50:48,453 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:48,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:50:48,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:48,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:50:48,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:50:48,486 INFO L87 Difference]: Start difference. First operand has 172 states, 171 states have (on average 3.3567251461988303) internal successors, (574), 171 states have internal predecessors, (574), 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 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 15:50:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:49,275 INFO L93 Difference]: Finished difference Result 447 states and 1505 transitions. [2021-11-19 15:50:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:50:49,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 21 [2021-11-19 15:50:49,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:49,301 INFO L225 Difference]: With dead ends: 447 [2021-11-19 15:50:49,301 INFO L226 Difference]: Without dead ends: 428 [2021-11-19 15:50:49,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:50:49,306 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 75 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:49,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 22 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:50:49,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-19 15:50:49,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 268. [2021-11-19 15:50:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.4307116104868913) internal successors, (916), 267 states have internal predecessors, (916), 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 15:50:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 916 transitions. [2021-11-19 15:50:49,387 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 916 transitions. Word has length 21 [2021-11-19 15:50:49,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:49,387 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 916 transitions. [2021-11-19 15:50:49,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 15:50:49,388 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 916 transitions. [2021-11-19 15:50:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 15:50:49,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:49,393 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] [2021-11-19 15:50:49,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:49,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:49,605 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:50:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1079592800, now seen corresponding path program 1 times [2021-11-19 15:50:49,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:49,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391066308] [2021-11-19 15:50:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:49,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:49,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:49,608 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:49,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:50:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:49,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:50:49,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:49,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:50,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:50,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391066308] [2021-11-19 15:50:50,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391066308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:50,066 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:50,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-19 15:50:50,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757911831] [2021-11-19 15:50:50,067 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:50,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:50:50,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:50,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:50:50,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:50:50,070 INFO L87 Difference]: Start difference. First operand 268 states and 916 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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 15:50:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:51,189 INFO L93 Difference]: Finished difference Result 512 states and 1771 transitions. [2021-11-19 15:50:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 15:50:51,191 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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 22 [2021-11-19 15:50:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:51,202 INFO L225 Difference]: With dead ends: 512 [2021-11-19 15:50:51,203 INFO L226 Difference]: Without dead ends: 510 [2021-11-19 15:50:51,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:50:51,212 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 149 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:51,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 29 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 15:50:51,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-19 15:50:51,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 348. [2021-11-19 15:50:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.5244956772334293) internal successors, (1223), 347 states have internal predecessors, (1223), 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 15:50:51,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1223 transitions. [2021-11-19 15:50:51,280 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1223 transitions. Word has length 22 [2021-11-19 15:50:51,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:51,281 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1223 transitions. [2021-11-19 15:50:51,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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 15:50:51,282 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1223 transitions. [2021-11-19 15:50:51,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 15:50:51,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:51,293 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] [2021-11-19 15:50:51,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:51,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:51,506 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:50:51,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:51,506 INFO L85 PathProgramCache]: Analyzing trace with hash 725493958, now seen corresponding path program 2 times [2021-11-19 15:50:51,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:51,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197036627] [2021-11-19 15:50:51,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:50:51,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:51,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:51,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:51,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:50:51,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:50:51,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:50:51,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:50:51,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:51,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:52,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:52,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197036627] [2021-11-19 15:50:52,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197036627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:52,061 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:52,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-19 15:50:52,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076538529] [2021-11-19 15:50:52,061 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:52,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:50:52,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:52,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:50:52,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:50:52,063 INFO L87 Difference]: Start difference. First operand 348 states and 1223 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 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 15:50:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:53,271 INFO L93 Difference]: Finished difference Result 620 states and 2224 transitions. [2021-11-19 15:50:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 15:50:53,272 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 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 22 [2021-11-19 15:50:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:53,279 INFO L225 Difference]: With dead ends: 620 [2021-11-19 15:50:53,279 INFO L226 Difference]: Without dead ends: 544 [2021-11-19 15:50:53,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:50:53,282 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 116 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:53,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 34 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 15:50:53,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-19 15:50:53,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 360. [2021-11-19 15:50:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.7576601671309193) internal successors, (1349), 359 states have internal predecessors, (1349), 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 15:50:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1349 transitions. [2021-11-19 15:50:53,310 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1349 transitions. Word has length 22 [2021-11-19 15:50:53,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:53,311 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1349 transitions. [2021-11-19 15:50:53,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 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 15:50:53,311 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1349 transitions. [2021-11-19 15:50:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 15:50:53,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:53,314 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] [2021-11-19 15:50:53,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:53,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:53,527 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:50:53,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1879228164, now seen corresponding path program 3 times [2021-11-19 15:50:53,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:53,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129008515] [2021-11-19 15:50:53,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:50:53,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:53,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:53,531 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:53,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:50:53,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 15:50:53,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:50:53,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:50:53,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:53,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:54,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:54,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129008515] [2021-11-19 15:50:54,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129008515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:54,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2068680481] [2021-11-19 15:50:54,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:50:54,287 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:54,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:50:54,289 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:50:54,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-19 15:50:54,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 15:50:54,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:50:54,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:50:54,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:54,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:54,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2068680481] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:54,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:50:54,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 5] total 14 [2021-11-19 15:50:54,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400885641] [2021-11-19 15:50:54,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:54,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:50:54,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:54,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:50:54,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:50:54,970 INFO L87 Difference]: Start difference. First operand 360 states and 1349 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 15:50:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:55,615 INFO L93 Difference]: Finished difference Result 470 states and 1687 transitions. [2021-11-19 15:50:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:50:55,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 22 [2021-11-19 15:50:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:55,623 INFO L225 Difference]: With dead ends: 470 [2021-11-19 15:50:55,623 INFO L226 Difference]: Without dead ends: 470 [2021-11-19 15:50:55,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:50:55,625 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:55,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 16 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 15:50:55,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-19 15:50:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 392. [2021-11-19 15:50:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.7468030690537084) internal successors, (1465), 391 states have internal predecessors, (1465), 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 15:50:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1465 transitions. [2021-11-19 15:50:55,661 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1465 transitions. Word has length 22 [2021-11-19 15:50:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:55,663 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1465 transitions. [2021-11-19 15:50:55,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 15:50:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1465 transitions. [2021-11-19 15:50:55,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 15:50:55,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:55,665 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] [2021-11-19 15:50:55,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:55,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:56,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:56,079 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:50:56,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:56,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1291885548, now seen corresponding path program 4 times [2021-11-19 15:50:56,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:56,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600552492] [2021-11-19 15:50:56,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:50:56,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:56,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:56,081 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:56,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:50:56,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:50:56,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:50:56,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:50:56,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:56,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:56,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:56,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600552492] [2021-11-19 15:50:56,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600552492] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:56,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:56,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-19 15:50:56,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82303086] [2021-11-19 15:50:56,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:56,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:50:56,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:56,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:50:56,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:50:56,601 INFO L87 Difference]: Start difference. First operand 392 states and 1465 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 15:50:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:56,991 INFO L93 Difference]: Finished difference Result 668 states and 2408 transitions. [2021-11-19 15:50:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:50:56,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 22 [2021-11-19 15:50:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:57,000 INFO L225 Difference]: With dead ends: 668 [2021-11-19 15:50:57,001 INFO L226 Difference]: Without dead ends: 650 [2021-11-19 15:50:57,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:50:57,002 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 62 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:57,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 13 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:50:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-19 15:50:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 496. [2021-11-19 15:50:57,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.7434343434343433) internal successors, (1853), 495 states have internal predecessors, (1853), 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 15:50:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1853 transitions. [2021-11-19 15:50:57,033 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1853 transitions. Word has length 22 [2021-11-19 15:50:57,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:57,033 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 1853 transitions. [2021-11-19 15:50:57,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 15:50:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1853 transitions. [2021-11-19 15:50:57,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 15:50:57,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:57,037 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] [2021-11-19 15:50:57,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:57,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:57,249 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:50:57,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:57,249 INFO L85 PathProgramCache]: Analyzing trace with hash -253836712, now seen corresponding path program 1 times [2021-11-19 15:50:57,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:57,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625520072] [2021-11-19 15:50:57,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:57,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:57,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:57,251 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:57,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:50:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:57,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:50:57,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:57,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:57,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:57,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625520072] [2021-11-19 15:50:57,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625520072] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:57,507 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:57,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-19 15:50:57,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066514614] [2021-11-19 15:50:57,508 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:57,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:50:57,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:57,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:50:57,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:50:57,509 INFO L87 Difference]: Start difference. First operand 496 states and 1853 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 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 15:50:57,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:57,880 INFO L93 Difference]: Finished difference Result 774 states and 2668 transitions. [2021-11-19 15:50:57,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:50:57,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 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 23 [2021-11-19 15:50:57,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:57,890 INFO L225 Difference]: With dead ends: 774 [2021-11-19 15:50:57,890 INFO L226 Difference]: Without dead ends: 734 [2021-11-19 15:50:57,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:50:57,891 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 65 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:57,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 11 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 15:50:57,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-19 15:50:57,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 562. [2021-11-19 15:50:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 3.5418894830659537) internal successors, (1987), 561 states have internal predecessors, (1987), 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 15:50:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1987 transitions. [2021-11-19 15:50:57,937 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1987 transitions. Word has length 23 [2021-11-19 15:50:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:57,937 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1987 transitions. [2021-11-19 15:50:57,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 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 15:50:57,938 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1987 transitions. [2021-11-19 15:50:57,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 15:50:57,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:57,941 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] [2021-11-19 15:50:57,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:58,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:58,154 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:50:58,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:58,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1577211143, now seen corresponding path program 1 times [2021-11-19 15:50:58,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:58,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626176341] [2021-11-19 15:50:58,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:58,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:58,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:58,158 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:58,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:50:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:58,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:50:58,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:50:58,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:50:58,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:58,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626176341] [2021-11-19 15:50:58,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626176341] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:58,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1948746339] [2021-11-19 15:50:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:58,734 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:58,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:50:58,736 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:50:58,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 15:50:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:58,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:50:58,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:50:59,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:50:59,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1948746339] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:59,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408533388] [2021-11-19 15:50:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:59,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:50:59,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:50:59,247 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:50:59,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 15:50:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:59,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:50:59,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:50:59,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:50:59,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408533388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:59,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:50:59,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 18 [2021-11-19 15:50:59,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445953604] [2021-11-19 15:50:59,705 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:50:59,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 15:50:59,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:59,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 15:50:59,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-19 15:50:59,707 INFO L87 Difference]: Start difference. First operand 562 states and 1987 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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 15:51:03,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:03,162 INFO L93 Difference]: Finished difference Result 1821 states and 6161 transitions. [2021-11-19 15:51:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 15:51:03,163 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-19 15:51:03,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:03,181 INFO L225 Difference]: With dead ends: 1821 [2021-11-19 15:51:03,182 INFO L226 Difference]: Without dead ends: 1575 [2021-11-19 15:51:03,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=563, Invalid=1987, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 15:51:03,184 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 576 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:03,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 96 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 15:51:03,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-11-19 15:51:03,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 571. [2021-11-19 15:51:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 3.4842105263157896) internal successors, (1986), 570 states have internal predecessors, (1986), 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 15:51:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1986 transitions. [2021-11-19 15:51:03,255 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1986 transitions. Word has length 24 [2021-11-19 15:51:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:03,256 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 1986 transitions. [2021-11-19 15:51:03,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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 15:51:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1986 transitions. [2021-11-19 15:51:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 15:51:03,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:03,259 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] [2021-11-19 15:51:03,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:03,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:03,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:03,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:51:03,862 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:51:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:03,863 INFO L85 PathProgramCache]: Analyzing trace with hash 158511730, now seen corresponding path program 1 times [2021-11-19 15:51:03,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:03,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605412593] [2021-11-19 15:51:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:03,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:03,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:03,865 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:03,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:51:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:03,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:51:03,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:51:04,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:51:04,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:04,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605412593] [2021-11-19 15:51:04,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605412593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:04,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1753596999] [2021-11-19 15:51:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:04,136 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:51:04,137 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:51:04,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 15:51:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:04,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:51:04,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:51:04,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:51:04,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1753596999] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:51:04,533 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:51:04,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 13 [2021-11-19 15:51:04,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549449276] [2021-11-19 15:51:04,534 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:04,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:51:04,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:04,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:51:04,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:51:04,535 INFO L87 Difference]: Start difference. First operand 571 states and 1986 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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 15:51:04,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:04,936 INFO L93 Difference]: Finished difference Result 507 states and 1749 transitions. [2021-11-19 15:51:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:51:04,937 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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 25 [2021-11-19 15:51:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:04,943 INFO L225 Difference]: With dead ends: 507 [2021-11-19 15:51:04,943 INFO L226 Difference]: Without dead ends: 481 [2021-11-19 15:51:04,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:51:04,944 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:04,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 26 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 15:51:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-19 15:51:04,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 481. [2021-11-19 15:51:04,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.5375) internal successors, (1698), 480 states have internal predecessors, (1698), 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 15:51:04,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1698 transitions. [2021-11-19 15:51:04,967 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1698 transitions. Word has length 25 [2021-11-19 15:51:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:04,968 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1698 transitions. [2021-11-19 15:51:04,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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 15:51:04,968 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1698 transitions. [2021-11-19 15:51:04,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 15:51:04,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:04,971 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] [2021-11-19 15:51:04,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:05,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-19 15:51:05,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:05,384 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:51:05,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:05,384 INFO L85 PathProgramCache]: Analyzing trace with hash 48957042, now seen corresponding path program 1 times [2021-11-19 15:51:05,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:05,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819946491] [2021-11-19 15:51:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:05,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:05,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:05,386 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:05,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:51:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:05,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:51:05,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:51:05,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:51:05,705 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:05,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819946491] [2021-11-19 15:51:05,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819946491] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:05,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1076124832] [2021-11-19 15:51:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:05,706 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:05,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:51:05,707 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:51:05,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 15:51:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:05,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:51:05,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:51:05,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:51:06,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1076124832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:06,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961935953] [2021-11-19 15:51:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:06,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:51:06,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:51:06,020 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:51:06,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 15:51:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:06,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:51:06,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:51:06,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:51:06,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961935953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:06,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:51:06,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-19 15:51:06,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466011341] [2021-11-19 15:51:06,235 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:51:06,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:51:06,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:06,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:51:06,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:51:06,237 INFO L87 Difference]: Start difference. First operand 481 states and 1698 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 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 15:51:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:06,742 INFO L93 Difference]: Finished difference Result 729 states and 2545 transitions. [2021-11-19 15:51:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:51:06,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 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 28 [2021-11-19 15:51:06,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:06,750 INFO L225 Difference]: With dead ends: 729 [2021-11-19 15:51:06,750 INFO L226 Difference]: Without dead ends: 673 [2021-11-19 15:51:06,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:51:06,752 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:06,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 26 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:51:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-11-19 15:51:06,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 585. [2021-11-19 15:51:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.5273972602739727) internal successors, (2060), 584 states have internal predecessors, (2060), 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 15:51:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 2060 transitions. [2021-11-19 15:51:06,781 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 2060 transitions. Word has length 28 [2021-11-19 15:51:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:06,781 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 2060 transitions. [2021-11-19 15:51:06,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 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 15:51:06,781 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 2060 transitions. [2021-11-19 15:51:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 15:51:06,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:06,789 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 15:51:06,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:06,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:07,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:07,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:51:07,392 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:51:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:07,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1287136326, now seen corresponding path program 2 times [2021-11-19 15:51:07,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:07,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463671261] [2021-11-19 15:51:07,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:51:07,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:07,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:07,394 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:07,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:51:07,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:51:07,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:51:07,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:51:07,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:51:07,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:51:08,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:08,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463671261] [2021-11-19 15:51:08,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463671261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:08,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1922865514] [2021-11-19 15:51:08,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:51:08,054 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:08,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:51:08,058 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:51:08,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 15:51:08,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:51:08,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:51:08,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:51:08,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:51:08,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:51:08,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1922865514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:08,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243733646] [2021-11-19 15:51:08,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:51:08,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:51:08,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:51:08,721 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:51:08,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 15:51:08,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:51:08,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:51:08,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:51:08,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:51:09,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:51:09,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243733646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:09,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:51:09,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 8, 8] total 29 [2021-11-19 15:51:09,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532485453] [2021-11-19 15:51:09,482 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:51:09,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 15:51:09,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:09,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 15:51:09,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-11-19 15:51:09,485 INFO L87 Difference]: Start difference. First operand 585 states and 2060 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 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 15:51:21,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:21,582 INFO L93 Difference]: Finished difference Result 1160 states and 4071 transitions. [2021-11-19 15:51:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-19 15:51:21,584 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 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 30 [2021-11-19 15:51:21,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:21,594 INFO L225 Difference]: With dead ends: 1160 [2021-11-19 15:51:21,594 INFO L226 Difference]: Without dead ends: 1020 [2021-11-19 15:51:21,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3573 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1659, Invalid=9471, Unknown=0, NotChecked=0, Total=11130 [2021-11-19 15:51:21,599 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 571 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:21,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 257 Invalid, 2155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-19 15:51:21,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2021-11-19 15:51:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 498. [2021-11-19 15:51:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.6116700201207244) internal successors, (1795), 497 states have internal predecessors, (1795), 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 15:51:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1795 transitions. [2021-11-19 15:51:21,628 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1795 transitions. Word has length 30 [2021-11-19 15:51:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:21,629 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1795 transitions. [2021-11-19 15:51:21,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 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 15:51:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1795 transitions. [2021-11-19 15:51:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 15:51:21,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:21,632 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:21,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-19 15:51:21,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:22,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:22,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:51:22,253 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:51:22,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:22,254 INFO L85 PathProgramCache]: Analyzing trace with hash 169509139, now seen corresponding path program 3 times [2021-11-19 15:51:22,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:22,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262188515] [2021-11-19 15:51:22,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:51:22,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:22,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:22,256 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:22,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:51:22,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 15:51:22,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:51:22,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:51:22,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 15:51:22,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 15:51:23,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:23,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262188515] [2021-11-19 15:51:23,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262188515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:23,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1273668253] [2021-11-19 15:51:23,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:51:23,117 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:23,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:51:23,117 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:51:23,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 15:51:23,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 15:51:23,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:51:23,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:51:23,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 15:51:23,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 15:51:23,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1273668253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:23,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053439677] [2021-11-19 15:51:23,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:51:23,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:51:23,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:51:23,819 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:51:23,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 15:51:24,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 15:51:24,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:51:24,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 15:51:24,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 15:51:24,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 15:51:24,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053439677] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:24,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:51:24,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 8] total 24 [2021-11-19 15:51:24,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290100292] [2021-11-19 15:51:24,517 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:51:24,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 15:51:24,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 15:51:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-11-19 15:51:24,519 INFO L87 Difference]: Start difference. First operand 498 states and 1795 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 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 15:51:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:26,268 INFO L93 Difference]: Finished difference Result 1382 states and 4974 transitions. [2021-11-19 15:51:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 15:51:26,270 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 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 32 [2021-11-19 15:51:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:26,286 INFO L225 Difference]: With dead ends: 1382 [2021-11-19 15:51:26,286 INFO L226 Difference]: Without dead ends: 1382 [2021-11-19 15:51:26,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=979, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 15:51:26,288 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 400 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:26,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 81 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 15:51:26,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-11-19 15:51:26,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 430. [2021-11-19 15:51:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.344988344988345) internal successors, (1435), 429 states have internal predecessors, (1435), 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 15:51:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1435 transitions. [2021-11-19 15:51:26,321 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1435 transitions. Word has length 32 [2021-11-19 15:51:26,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:26,322 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1435 transitions. [2021-11-19 15:51:26,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 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 15:51:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1435 transitions. [2021-11-19 15:51:26,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 15:51:26,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:26,325 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 15:51:26,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:26,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:26,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 15:51:26,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:26,950 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:51:26,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:26,951 INFO L85 PathProgramCache]: Analyzing trace with hash -994170406, now seen corresponding path program 4 times [2021-11-19 15:51:26,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:26,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615473777] [2021-11-19 15:51:26,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:51:26,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:26,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:26,952 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:26,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 15:51:27,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:51:27,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:51:27,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:51:27,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:51:27,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:51:27,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:27,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615473777] [2021-11-19 15:51:27,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615473777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:27,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [323232730] [2021-11-19 15:51:27,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:51:27,365 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:27,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:51:27,366 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:51:27,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-19 15:51:27,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:51:27,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:51:27,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:51:27,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:51:27,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:51:28,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [323232730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:28,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081722429] [2021-11-19 15:51:28,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:51:28,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:51:28,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:51:28,255 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:51:28,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 15:51:28,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:51:28,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:51:28,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:51:28,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:51:28,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:51:29,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081722429] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:29,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:51:29,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 33 [2021-11-19 15:51:29,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543074665] [2021-11-19 15:51:29,124 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:51:29,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 15:51:29,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:29,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 15:51:29,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 15:51:29,126 INFO L87 Difference]: Start difference. First operand 430 states and 1435 transitions. Second operand has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 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 15:52:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:19,079 INFO L93 Difference]: Finished difference Result 6366 states and 21497 transitions. [2021-11-19 15:52:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 405 states. [2021-11-19 15:52:19,080 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 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 34 [2021-11-19 15:52:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:19,136 INFO L225 Difference]: With dead ends: 6366 [2021-11-19 15:52:19,136 INFO L226 Difference]: Without dead ends: 5618 [2021-11-19 15:52:19,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 431 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81386 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=15716, Invalid=171340, Unknown=0, NotChecked=0, Total=187056 [2021-11-19 15:52:19,200 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1566 mSDsluCounter, 3537 mSDsCounter, 0 mSdLazyCounter, 7661 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1566 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 8050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 7661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:19,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1566 Valid, 567 Invalid, 8050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 7661 Invalid, 0 Unknown, 0 Unchecked, 17.0s Time] [2021-11-19 15:52:19,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5618 states. [2021-11-19 15:52:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5618 to 2392. [2021-11-19 15:52:19,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 3.9247176913425346) internal successors, (9384), 2391 states have internal predecessors, (9384), 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 15:52:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 9384 transitions. [2021-11-19 15:52:19,366 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 9384 transitions. Word has length 34 [2021-11-19 15:52:19,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:19,366 INFO L470 AbstractCegarLoop]: Abstraction has 2392 states and 9384 transitions. [2021-11-19 15:52:19,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 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 15:52:19,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 9384 transitions. [2021-11-19 15:52:19,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:52:19,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:19,438 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 15:52:19,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:19,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-19 15:52:19,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:20,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:52:20,040 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:52:20,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:20,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1718062691, now seen corresponding path program 5 times [2021-11-19 15:52:20,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:20,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411898594] [2021-11-19 15:52:20,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 15:52:20,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:20,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:20,043 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:20,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 15:52:20,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 15:52:20,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:52:20,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:52:20,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:20,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:20,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:20,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411898594] [2021-11-19 15:52:20,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411898594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:52:20,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1668370576] [2021-11-19 15:52:20,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 15:52:20,850 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:52:20,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:52:20,852 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:52:20,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-19 15:52:36,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 15:52:36,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:52:36,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:52:36,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:37,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:37,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1668370576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:52:37,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185799187] [2021-11-19 15:52:37,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 15:52:37,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:52:37,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:52:37,222 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:52:37,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-19 15:52:49,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 15:52:49,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:52:49,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:52:49,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:49,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:49,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185799187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:52:49,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:52:49,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7, 7, 7, 7] total 19 [2021-11-19 15:52:49,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219651165] [2021-11-19 15:52:49,332 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:52:49,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 15:52:49,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:49,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 15:52:49,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-11-19 15:52:49,334 INFO L87 Difference]: Start difference. First operand 2392 states and 9384 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 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 15:52:51,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:51,909 INFO L93 Difference]: Finished difference Result 3564 states and 13628 transitions. [2021-11-19 15:52:51,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 15:52:51,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-19 15:52:51,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:51,937 INFO L225 Difference]: With dead ends: 3564 [2021-11-19 15:52:51,937 INFO L226 Difference]: Without dead ends: 3498 [2021-11-19 15:52:51,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2021-11-19 15:52:51,938 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 196 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:51,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 121 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 15:52:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-11-19 15:52:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 2646. [2021-11-19 15:52:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2645 states have (on average 3.89413988657845) internal successors, (10300), 2645 states have internal predecessors, (10300), 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 15:52:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 10300 transitions. [2021-11-19 15:52:52,075 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 10300 transitions. Word has length 35 [2021-11-19 15:52:52,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:52,075 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 10300 transitions. [2021-11-19 15:52:52,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 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 15:52:52,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 10300 transitions. [2021-11-19 15:52:52,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:52:52,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:52,088 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 15:52:52,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:52,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-19 15:52:52,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-19 15:52:52,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:52:52,704 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:52:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:52,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1383966227, now seen corresponding path program 6 times [2021-11-19 15:52:52,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:52,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741193176] [2021-11-19 15:52:52,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 15:52:52,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:52,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:52,707 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:52,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 15:52:52,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 15:52:52,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:52:52,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:52:52,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:53,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:53,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:53,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741193176] [2021-11-19 15:52:53,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741193176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:52:53,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [167928862] [2021-11-19 15:52:53,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 15:52:53,349 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:52:53,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:52:53,351 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:52:53,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-19 15:52:53,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 15:52:53,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246352978] [2021-11-19 15:52:53,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 15:52:53,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:52:53,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:52:53,671 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:52:53,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 1 [2021-11-19 15:52:53,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-19 15:52:54,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 15:52:54,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:52:54,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:52:54,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:54,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:54,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246352978] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:52:54,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-19 15:52:54,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 12 [2021-11-19 15:52:54,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645622111] [2021-11-19 15:52:54,241 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-19 15:52:54,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 15:52:54,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:54,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 15:52:54,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:52:54,242 INFO L87 Difference]: Start difference. First operand 2646 states and 10300 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:52:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:55,966 INFO L93 Difference]: Finished difference Result 3738 states and 14268 transitions. [2021-11-19 15:52:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:52:55,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-19 15:52:55,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:55,990 INFO L225 Difference]: With dead ends: 3738 [2021-11-19 15:52:55,990 INFO L226 Difference]: Without dead ends: 3672 [2021-11-19 15:52:55,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:52:55,991 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:55,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 62 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 15:52:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-11-19 15:52:56,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 2702. [2021-11-19 15:52:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2701 states have (on average 3.8859681599407625) internal successors, (10496), 2701 states have internal predecessors, (10496), 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 15:52:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 10496 transitions. [2021-11-19 15:52:56,149 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 10496 transitions. Word has length 35 [2021-11-19 15:52:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:56,149 INFO L470 AbstractCegarLoop]: Abstraction has 2702 states and 10496 transitions. [2021-11-19 15:52:56,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:52:56,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 10496 transitions. [2021-11-19 15:52:56,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 15:52:56,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:56,182 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 15:52:56,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:56,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-19 15:52:56,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:52:56,594 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:52:56,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:56,594 INFO L85 PathProgramCache]: Analyzing trace with hash 108846813, now seen corresponding path program 7 times [2021-11-19 15:52:56,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:56,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028239289] [2021-11-19 15:52:56,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 15:52:56,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:56,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:56,597 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:56,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 15:52:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:56,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:52:56,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:56,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:57,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:57,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028239289] [2021-11-19 15:52:57,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028239289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:52:57,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1726820799] [2021-11-19 15:52:57,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 15:52:57,033 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:52:57,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:52:57,034 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:52:57,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-19 15:52:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:57,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:52:57,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:57,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:57,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1726820799] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:52:57,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911494045] [2021-11-19 15:52:57,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 15:52:57,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:52:57,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:52:57,420 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:52:57,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-19 15:52:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:57,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:52:57,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:57,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:52:57,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911494045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:52:57,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:52:57,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-19 15:52:57,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486976736] [2021-11-19 15:52:57,801 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:52:57,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 15:52:57,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:57,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 15:52:57,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:52:57,803 INFO L87 Difference]: Start difference. First operand 2702 states and 10496 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 15:52:59,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:59,179 INFO L93 Difference]: Finished difference Result 3962 states and 15083 transitions. [2021-11-19 15:52:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 15:52:59,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-19 15:52:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:59,202 INFO L225 Difference]: With dead ends: 3962 [2021-11-19 15:52:59,203 INFO L226 Difference]: Without dead ends: 3896 [2021-11-19 15:52:59,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-19 15:52:59,204 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:59,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 63 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 15:52:59,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3896 states. [2021-11-19 15:52:59,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3896 to 2472. [2021-11-19 15:52:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 3.84581141238365) internal successors, (9503), 2471 states have internal predecessors, (9503), 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 15:52:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 9503 transitions. [2021-11-19 15:52:59,390 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 9503 transitions. Word has length 35 [2021-11-19 15:52:59,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:59,390 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 9503 transitions. [2021-11-19 15:52:59,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 15:52:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 9503 transitions. [2021-11-19 15:52:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 15:52:59,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:59,404 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:52:59,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:59,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-19 15:52:59,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-19 15:53:00,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:53:00,008 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:53:00,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:53:00,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1391352933, now seen corresponding path program 8 times [2021-11-19 15:53:00,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:53:00,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018338091] [2021-11-19 15:53:00,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:53:00,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:53:00,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:53:00,010 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:53:00,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 15:53:00,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:53:00,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:53:00,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:53:00,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:53:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:53:00,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:53:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:53:00,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:53:00,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018338091] [2021-11-19 15:53:00,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018338091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:53:00,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1273549669] [2021-11-19 15:53:00,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:53:00,963 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:53:00,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:53:00,972 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:53:00,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-19 15:53:01,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:53:01,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:53:01,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:53:01,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:53:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:53:01,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:53:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:53:01,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1273549669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:53:01,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620540857] [2021-11-19 15:53:01,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:53:01,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:53:01,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:53:01,683 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:53:01,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-19 15:53:01,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:53:01,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:53:01,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 15:53:01,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:53:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:53:02,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:53:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:53:04,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620540857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:53:04,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:53:04,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 13, 13] total 41 [2021-11-19 15:53:04,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686097841] [2021-11-19 15:53:04,069 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:53:04,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-19 15:53:04,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:53:04,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-19 15:53:04,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 15:53:04,071 INFO L87 Difference]: Start difference. First operand 2472 states and 9503 transitions. Second operand has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 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 15:54:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:54:11,701 INFO L93 Difference]: Finished difference Result 4913 states and 19380 transitions. [2021-11-19 15:54:11,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-11-19 15:54:11,703 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 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 37 [2021-11-19 15:54:11,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:54:11,724 INFO L225 Difference]: With dead ends: 4913 [2021-11-19 15:54:11,725 INFO L226 Difference]: Without dead ends: 4188 [2021-11-19 15:54:11,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14794 ImplicationChecksByTransitivity, 56.8s TimeCoverageRelationStatistics Valid=6583, Invalid=35237, Unknown=0, NotChecked=0, Total=41820 [2021-11-19 15:54:11,731 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 857 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 3900 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 4223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 3900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:54:11,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 315 Invalid, 4223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 3900 Invalid, 0 Unknown, 0 Unchecked, 12.4s Time] [2021-11-19 15:54:11,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-11-19 15:54:11,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 1736. [2021-11-19 15:54:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 4.029394812680115) internal successors, (6991), 1735 states have internal predecessors, (6991), 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 15:54:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 6991 transitions. [2021-11-19 15:54:11,846 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 6991 transitions. Word has length 37 [2021-11-19 15:54:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:54:11,847 INFO L470 AbstractCegarLoop]: Abstraction has 1736 states and 6991 transitions. [2021-11-19 15:54:11,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 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 15:54:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 6991 transitions. [2021-11-19 15:54:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 15:54:11,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:54:11,856 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 15:54:11,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-19 15:54:12,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-19 15:54:12,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-19 15:54:12,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:54:12,470 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:54:12,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:54:12,471 INFO L85 PathProgramCache]: Analyzing trace with hash -210754080, now seen corresponding path program 9 times [2021-11-19 15:54:12,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:54:12,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982139343] [2021-11-19 15:54:12,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:54:12,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:54:12,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:54:12,472 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:54:12,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-19 15:54:12,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 15:54:12,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:54:12,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:54:12,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:54:13,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:54:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:54:13,808 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:54:13,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982139343] [2021-11-19 15:54:13,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982139343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:54:13,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [220139166] [2021-11-19 15:54:13,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:54:13,809 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:54:13,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:54:13,809 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:54:13,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-19 15:54:14,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 15:54:14,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:54:14,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:54:14,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:54:14,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:54:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:54:15,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [220139166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:54:15,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245338790] [2021-11-19 15:54:15,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:54:15,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:54:15,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:54:15,036 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:54:15,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-19 15:54:15,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 15:54:15,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:54:15,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 15:54:15,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:54:16,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:54:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:54:17,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245338790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:54:17,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:54:17,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 28 [2021-11-19 15:54:17,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957324637] [2021-11-19 15:54:17,516 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:54:17,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 15:54:17,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:54:17,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 15:54:17,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2021-11-19 15:54:17,518 INFO L87 Difference]: Start difference. First operand 1736 states and 6991 transitions. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 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 15:54:19,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:54:19,702 INFO L93 Difference]: Finished difference Result 7305 states and 29092 transitions. [2021-11-19 15:54:19,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 15:54:19,703 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 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 39 [2021-11-19 15:54:19,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:54:19,736 INFO L225 Difference]: With dead ends: 7305 [2021-11-19 15:54:19,737 INFO L226 Difference]: Without dead ends: 7281 [2021-11-19 15:54:19,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 15:54:19,738 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 424 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:54:19,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 88 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 15:54:19,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7281 states. [2021-11-19 15:54:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7281 to 4353. [2021-11-19 15:54:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 3.9942555147058822) internal successors, (17383), 4352 states have internal predecessors, (17383), 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 15:54:20,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 17383 transitions. [2021-11-19 15:54:20,013 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 17383 transitions. Word has length 39 [2021-11-19 15:54:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:54:20,014 INFO L470 AbstractCegarLoop]: Abstraction has 4353 states and 17383 transitions. [2021-11-19 15:54:20,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 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 15:54:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 17383 transitions. [2021-11-19 15:54:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 15:54:20,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:54:20,036 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 15:54:20,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-19 15:54:20,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-19 15:54:20,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-19 15:54:20,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:54:20,642 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:54:20,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:54:20,643 INFO L85 PathProgramCache]: Analyzing trace with hash 740477671, now seen corresponding path program 10 times [2021-11-19 15:54:20,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:54:20,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014083821] [2021-11-19 15:54:20,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:54:20,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:54:20,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:54:20,644 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:54:20,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-19 15:54:20,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:54:20,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:54:21,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:54:21,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:54:21,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:54:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:54:22,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:54:22,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014083821] [2021-11-19 15:54:22,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014083821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:54:22,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1439533509] [2021-11-19 15:54:22,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:54:22,027 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:54:22,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:54:22,033 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:54:22,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-19 15:54:22,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:54:22,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:54:22,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:54:22,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:54:22,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:54:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:54:22,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1439533509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:54:22,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550532244] [2021-11-19 15:54:22,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:54:22,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:54:22,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:54:22,773 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:54:22,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-19 15:54:22,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:54:22,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:54:22,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 15:54:22,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:54:23,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:54:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:54:25,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550532244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:54:25,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:54:25,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 13, 13] total 45 [2021-11-19 15:54:25,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940501521] [2021-11-19 15:54:25,274 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:54:25,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-19 15:54:25,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:54:25,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-19 15:54:25,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1620, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 15:54:25,276 INFO L87 Difference]: Start difference. First operand 4353 states and 17383 transitions. Second operand has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 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 15:54:34,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:54:34,970 INFO L93 Difference]: Finished difference Result 7379 states and 28892 transitions. [2021-11-19 15:54:34,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-19 15:54:34,971 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 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 40 [2021-11-19 15:54:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:54:34,992 INFO L225 Difference]: With dead ends: 7379 [2021-11-19 15:54:34,992 INFO L226 Difference]: Without dead ends: 7379 [2021-11-19 15:54:34,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3736 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2539, Invalid=10801, Unknown=0, NotChecked=0, Total=13340 [2021-11-19 15:54:34,995 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 855 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:54:34,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 220 Invalid, 3010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 2769 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-19 15:54:35,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7379 states. [2021-11-19 15:54:35,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7379 to 3121. [2021-11-19 15:54:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3121 states, 3120 states have (on average 3.8705128205128205) internal successors, (12076), 3120 states have internal predecessors, (12076), 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 15:54:35,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 12076 transitions. [2021-11-19 15:54:35,227 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 12076 transitions. Word has length 40 [2021-11-19 15:54:35,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:54:35,227 INFO L470 AbstractCegarLoop]: Abstraction has 3121 states and 12076 transitions. [2021-11-19 15:54:35,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 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 15:54:35,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 12076 transitions. [2021-11-19 15:54:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 15:54:35,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:54:35,253 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:54:35,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-19 15:54:35,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2021-11-19 15:54:35,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-19 15:54:35,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:54:35,870 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:54:35,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:54:35,871 INFO L85 PathProgramCache]: Analyzing trace with hash -921182708, now seen corresponding path program 11 times [2021-11-19 15:54:35,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:54:35,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994956932] [2021-11-19 15:54:35,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 15:54:35,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:54:35,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:54:35,874 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:54:35,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-19 15:54:36,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-19 15:54:36,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:54:36,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:54:36,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:54:36,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:54:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:54:36,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:54:36,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994956932] [2021-11-19 15:54:36,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994956932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:54:36,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [769891278] [2021-11-19 15:54:36,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 15:54:36,615 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:54:36,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:54:36,616 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:54:36,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-19 15:54:45,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-19 15:54:45,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:54:45,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 15:54:45,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:54:45,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:54:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:54:45,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [769891278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:54:45,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356440272] [2021-11-19 15:54:45,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 15:54:45,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:54:45,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:54:45,688 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:54:45,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-19 15:55:26,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-19 15:55:26,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:55:26,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 15:55:26,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:55:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:55:26,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:55:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:55:27,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356440272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:55:27,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:55:27,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 11, 12] total 35 [2021-11-19 15:55:27,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533865624] [2021-11-19 15:55:27,344 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:55:27,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-19 15:55:27,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:55:27,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-19 15:55:27,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 15:55:27,346 INFO L87 Difference]: Start difference. First operand 3121 states and 12076 transitions. Second operand has 35 states, 35 states have (on average 2.742857142857143) internal successors, (96), 35 states have internal predecessors, (96), 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 15:56:40,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:56:40,991 INFO L93 Difference]: Finished difference Result 24067 states and 89075 transitions. [2021-11-19 15:56:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 358 states. [2021-11-19 15:56:40,993 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.742857142857143) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-19 15:56:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:56:41,083 INFO L225 Difference]: With dead ends: 24067 [2021-11-19 15:56:41,083 INFO L226 Difference]: Without dead ends: 23201 [2021-11-19 15:56:41,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69137 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=16084, Invalid=135626, Unknown=0, NotChecked=0, Total=151710 [2021-11-19 15:56:41,092 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1909 mSDsluCounter, 3624 mSDsCounter, 0 mSdLazyCounter, 9063 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1909 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 9519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 9063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:56:41,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1909 Valid, 367 Invalid, 9519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 9063 Invalid, 0 Unknown, 0 Unchecked, 29.9s Time] [2021-11-19 15:56:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23201 states. [2021-11-19 15:56:41,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23201 to 5487. [2021-11-19 15:56:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5486 states have (on average 3.913233685745534) internal successors, (21468), 5486 states have internal predecessors, (21468), 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 15:56:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 21468 transitions. [2021-11-19 15:56:41,737 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 21468 transitions. Word has length 42 [2021-11-19 15:56:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:56:41,737 INFO L470 AbstractCegarLoop]: Abstraction has 5487 states and 21468 transitions. [2021-11-19 15:56:41,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.742857142857143) internal successors, (96), 35 states have internal predecessors, (96), 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 15:56:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 21468 transitions. [2021-11-19 15:56:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 15:56:41,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:56:41,764 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:56:41,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2021-11-19 15:56:42,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-19 15:56:42,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-19 15:56:42,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:56:42,377 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 15:56:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:56:42,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1049080676, now seen corresponding path program 12 times [2021-11-19 15:56:42,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:56:42,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639018603] [2021-11-19 15:56:42,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 15:56:42,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:56:42,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:56:42,380 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:56:42,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-19 15:56:42,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-19 15:56:42,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:56:42,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 15:56:42,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:56:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:56:43,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:56:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:56:43,656 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:56:43,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639018603] [2021-11-19 15:56:43,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639018603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:56:43,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1262588792] [2021-11-19 15:56:43,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 15:56:43,657 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:56:43,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:56:43,658 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:56:43,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-11-19 15:56:43,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 15:56:43,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618561675] [2021-11-19 15:56:43,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 15:56:43,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:56:43,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:56:43,939 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:56:43,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 1 [2021-11-19 15:56:43,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-19 15:56:45,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-19 15:56:45,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:56:45,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:56:45,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:56:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:56:45,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:56:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:56:46,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618561675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:56:46,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-19 15:56:46,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10, 12] total 40 [2021-11-19 15:56:46,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495143474] [2021-11-19 15:56:46,492 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-19 15:56:46,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 15:56:46,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:56:46,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 15:56:46,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 15:56:46,494 INFO L87 Difference]: Start difference. First operand 5487 states and 21468 transitions. Second operand has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 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 16:00:44,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 16:00:44,226 INFO L93 Difference]: Finished difference Result 43657 states and 163931 transitions. [2021-11-19 16:00:44,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 821 states. [2021-11-19 16:00:44,228 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-19 16:00:44,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 16:00:44,414 INFO L225 Difference]: With dead ends: 43657 [2021-11-19 16:00:44,414 INFO L226 Difference]: Without dead ends: 41217 [2021-11-19 16:00:44,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 852 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346500 ImplicationChecksByTransitivity, 187.7s TimeCoverageRelationStatistics Valid=60824, Invalid=667638, Unknown=0, NotChecked=0, Total=728462 [2021-11-19 16:00:44,458 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1774 mSDsluCounter, 4659 mSDsCounter, 0 mSdLazyCounter, 13143 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1774 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 13639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 13143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.7s IncrementalHoareTripleChecker+Time [2021-11-19 16:00:44,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1774 Valid, 503 Invalid, 13639 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [496 Valid, 13143 Invalid, 0 Unknown, 0 Unchecked, 48.7s Time] [2021-11-19 16:00:44,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41217 states. [2021-11-19 16:00:45,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41217 to 15457. [2021-11-19 16:00:45,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15457 states, 15456 states have (on average 4.152885610766045) internal successors, (64187), 15456 states have internal predecessors, (64187), 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 16:00:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15457 states to 15457 states and 64187 transitions. [2021-11-19 16:00:45,913 INFO L78 Accepts]: Start accepts. Automaton has 15457 states and 64187 transitions. Word has length 42 [2021-11-19 16:00:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 16:00:45,913 INFO L470 AbstractCegarLoop]: Abstraction has 15457 states and 64187 transitions. [2021-11-19 16:00:45,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 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 16:00:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 15457 states and 64187 transitions. [2021-11-19 16:00:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 16:00:45,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 16:00:45,983 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 16:00:46,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-19 16:00:46,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-19 16:00:46,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 16:00:46,398 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 16:00:46,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 16:00:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1456617996, now seen corresponding path program 13 times [2021-11-19 16:00:46,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 16:00:46,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815255897] [2021-11-19 16:00:46,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 16:00:46,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 16:00:46,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 16:00:46,401 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 16:00:46,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-19 16:00:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 16:00:46,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 16:00:46,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:00:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 16:00:46,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:00:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 16:00:47,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 16:00:47,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815255897] [2021-11-19 16:00:47,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815255897] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 16:00:47,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1139268550] [2021-11-19 16:00:47,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 16:00:47,010 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 16:00:47,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 16:00:47,011 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 16:00:47,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-19 16:00:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 16:00:47,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 16:00:47,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:00:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 16:00:47,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:00:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 16:00:47,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1139268550] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 16:00:47,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458126828] [2021-11-19 16:00:47,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 16:00:47,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 16:00:47,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 16:00:47,529 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 16:00:47,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-19 16:00:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 16:00:47,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 16:00:47,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:00:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 16:00:48,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:00:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 16:00:49,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458126828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 16:00:49,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 16:00:49,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 12] total 34 [2021-11-19 16:00:49,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924441164] [2021-11-19 16:00:49,135 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 16:00:49,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 16:00:49,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 16:00:49,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 16:00:49,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 16:00:49,137 INFO L87 Difference]: Start difference. First operand 15457 states and 64187 transitions. Second operand has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 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 16:02:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 16:02:51,991 INFO L93 Difference]: Finished difference Result 48941 states and 195382 transitions. [2021-11-19 16:02:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 506 states. [2021-11-19 16:02:51,993 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-19 16:02:51,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 16:02:52,377 INFO L225 Difference]: With dead ends: 48941 [2021-11-19 16:02:52,377 INFO L226 Difference]: Without dead ends: 47813 [2021-11-19 16:02:52,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125233 ImplicationChecksByTransitivity, 87.4s TimeCoverageRelationStatistics Valid=24862, Invalid=242944, Unknown=0, NotChecked=0, Total=267806 [2021-11-19 16:02:52,515 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1610 mSDsluCounter, 4328 mSDsCounter, 0 mSdLazyCounter, 11688 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 12094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 11688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.4s IncrementalHoareTripleChecker+Time [2021-11-19 16:02:52,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 331 Invalid, 12094 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [406 Valid, 11688 Invalid, 0 Unknown, 0 Unchecked, 35.4s Time] [2021-11-19 16:02:52,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47813 states. [2021-11-19 16:02:53,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47813 to 16897. [2021-11-19 16:02:53,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16897 states, 16896 states have (on average 4.154178503787879) internal successors, (70189), 16896 states have internal predecessors, (70189), 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 16:02:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16897 states to 16897 states and 70189 transitions. [2021-11-19 16:02:54,190 INFO L78 Accepts]: Start accepts. Automaton has 16897 states and 70189 transitions. Word has length 42 [2021-11-19 16:02:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 16:02:54,192 INFO L470 AbstractCegarLoop]: Abstraction has 16897 states and 70189 transitions. [2021-11-19 16:02:54,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 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 16:02:54,192 INFO L276 IsEmpty]: Start isEmpty. Operand 16897 states and 70189 transitions. [2021-11-19 16:02:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 16:02:54,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 16:02:54,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 16:02:54,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-19 16:02:54,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-11-19 16:02:54,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-19 16:02:54,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 16:02:54,880 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 16:02:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 16:02:54,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1209815108, now seen corresponding path program 14 times [2021-11-19 16:02:54,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 16:02:54,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136686880] [2021-11-19 16:02:54,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 16:02:54,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 16:02:54,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 16:02:54,884 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 16:02:54,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-19 16:02:55,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 16:02:55,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 16:02:55,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 16:02:55,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:02:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 16:02:55,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:02:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 16:02:55,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 16:02:55,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136686880] [2021-11-19 16:02:55,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136686880] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 16:02:55,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [964044565] [2021-11-19 16:02:55,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 16:02:55,687 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 16:02:55,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 16:02:55,714 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 16:02:55,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2021-11-19 16:02:56,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 16:02:56,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685734187] [2021-11-19 16:02:56,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 16:02:56,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 16:02:56,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 16:02:56,063 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 16:02:56,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 1 [2021-11-19 16:02:56,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a180c9e0-4578-4636-ac37-d760d676b8c7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-19 16:02:56,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 16:02:56,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 16:02:56,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 16:02:56,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:02:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 16:02:56,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:02:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 16:02:57,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685734187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 16:02:57,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-19 16:02:57,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 12] total 34 [2021-11-19 16:02:57,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358206676] [2021-11-19 16:02:57,698 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-19 16:02:57,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 16:02:57,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 16:02:57,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 16:02:57,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 16:02:57,700 INFO L87 Difference]: Start difference. First operand 16897 states and 70189 transitions. Second operand has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 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)