./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:28:29,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:28:29,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:28:29,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:28:29,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:28:29,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:28:29,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:28:29,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:28:29,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:28:30,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:28:30,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:28:30,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:28:30,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:28:30,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:28:30,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:28:30,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:28:30,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:28:30,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:28:30,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:28:30,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:28:30,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:28:30,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:28:30,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:28:30,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:28:30,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:28:30,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:28:30,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:28:30,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:28:30,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:28:30,065 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:28:30,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:28:30,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:28:30,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:28:30,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:28:30,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:28:30,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:28:30,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:28:30,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:28:30,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:28:30,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:28:30,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:28:30,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:28:30,134 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:28:30,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:28:30,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:28:30,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:28:30,139 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:28:30,140 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:28:30,144 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:28:30,145 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:28:30,145 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:28:30,145 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:28:30,146 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:28:30,147 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:28:30,147 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:28:30,147 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:28:30,148 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:28:30,148 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:28:30,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:28:30,149 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:28:30,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:28:30,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:28:30,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:28:30,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:28:30,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:28:30,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:28:30,151 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:28:30,151 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:28:30,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:28:30,153 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:28:30,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:28:30,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:28:30,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:28:30,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:28:30,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:28:30,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:28:30,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:28:30,155 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:28:30,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:28:30,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:28:30,156 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:28:30,157 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:28:30,157 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_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 [2021-11-12 22:28:30,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:28:30,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:28:30,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:28:30,568 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:28:30,569 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:28:30,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2021-11-12 22:28:30,646 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/data/5ef906d50/6127180e401a4baea09e09da658caf9f/FLAGd3d153832 [2021-11-12 22:28:31,345 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:28:31,346 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2021-11-12 22:28:31,365 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/data/5ef906d50/6127180e401a4baea09e09da658caf9f/FLAGd3d153832 [2021-11-12 22:28:31,669 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/data/5ef906d50/6127180e401a4baea09e09da658caf9f [2021-11-12 22:28:31,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:28:31,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:28:31,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:28:31,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:28:31,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:28:31,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:31" (1/1) ... [2021-11-12 22:28:31,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3531dae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:31, skipping insertion in model container [2021-11-12 22:28:31,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:31" (1/1) ... [2021-11-12 22:28:31,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:28:31,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:28:32,066 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2021-11-12 22:28:32,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:28:32,106 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:28:32,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@365eb57d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:32, skipping insertion in model container [2021-11-12 22:28:32,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:28:32,108 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:28:32,111 INFO L158 Benchmark]: Toolchain (without parser) took 435.31ms. Allocated memory is still 107.0MB. Free memory was 67.6MB in the beginning and 83.5MB in the end (delta: -15.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:28:32,112 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 107.0MB. Free memory is still 84.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:28:32,115 INFO L158 Benchmark]: CACSL2BoogieTranslator took 411.00ms. Allocated memory is still 107.0MB. Free memory was 67.4MB in the beginning and 83.8MB in the end (delta: -16.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:28:32,118 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 107.0MB. Free memory is still 84.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 411.00ms. Allocated memory is still 107.0MB. Free memory was 67.4MB in the beginning and 83.8MB in the end (delta: -16.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 104]: 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_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:28:35,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:28:35,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:28:35,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:28:35,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:28:35,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:28:35,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:28:35,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:28:35,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:28:35,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:28:35,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:28:35,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:28:35,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:28:35,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:28:35,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:28:35,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:28:35,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:28:35,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:28:35,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:28:35,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:28:35,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:28:35,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:28:35,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:28:35,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:28:35,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:28:35,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:28:35,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:28:35,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:28:35,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:28:35,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:28:35,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:28:35,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:28:35,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:28:35,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:28:35,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:28:35,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:28:35,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:28:35,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:28:35,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:28:35,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:28:35,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:28:35,234 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:28:35,301 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:28:35,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:28:35,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:28:35,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:28:35,304 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:28:35,305 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:28:35,305 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:28:35,305 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:28:35,305 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:28:35,306 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:28:35,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:28:35,310 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:28:35,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:28:35,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:28:35,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:28:35,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:28:35,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:28:35,311 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:28:35,312 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:28:35,312 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:28:35,312 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:28:35,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:28:35,313 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:28:35,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:28:35,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:28:35,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:28:35,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:28:35,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:28:35,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:28:35,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:28:35,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:28:35,315 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:28:35,316 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:35,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:28:35,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:28:35,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:28:35,317 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_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 [2021-11-12 22:28:35,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:28:35,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:28:35,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:28:35,821 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:28:35,821 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:28:35,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2021-11-12 22:28:35,923 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/data/c83deec36/25a81592eb704915a2fc4caa9ff02e05/FLAGade6a3889 [2021-11-12 22:28:36,700 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:28:36,700 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2021-11-12 22:28:36,715 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/data/c83deec36/25a81592eb704915a2fc4caa9ff02e05/FLAGade6a3889 [2021-11-12 22:28:37,016 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/data/c83deec36/25a81592eb704915a2fc4caa9ff02e05 [2021-11-12 22:28:37,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:28:37,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:28:37,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:28:37,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:28:37,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:28:37,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:37" (1/1) ... [2021-11-12 22:28:37,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3666be57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:37, skipping insertion in model container [2021-11-12 22:28:37,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:37" (1/1) ... [2021-11-12 22:28:37,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:28:37,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:28:37,257 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2021-11-12 22:28:37,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:28:37,315 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:28:37,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:28:37,344 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2021-11-12 22:28:37,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:28:37,386 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:28:37,414 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2021-11-12 22:28:37,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:28:37,441 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:28:37,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:37 WrapperNode [2021-11-12 22:28:37,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:28:37,443 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:28:37,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:28:37,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:28:37,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:37" (1/1) ... [2021-11-12 22:28:37,466 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:37" (1/1) ... [2021-11-12 22:28:37,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:28:37,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:28:37,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:28:37,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:28:37,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:37" (1/1) ... [2021-11-12 22:28:37,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:37" (1/1) ... [2021-11-12 22:28:37,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:37" (1/1) ... [2021-11-12 22:28:37,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:37" (1/1) ... [2021-11-12 22:28:37,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:37" (1/1) ... [2021-11-12 22:28:37,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:37" (1/1) ... [2021-11-12 22:28:37,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:37" (1/1) ... [2021-11-12 22:28:37,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:28:37,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:28:37,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:28:37,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:28:37,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:37" (1/1) ... [2021-11-12 22:28:37,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:28:37,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:28:37,630 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:28:37,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:28:37,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:28:37,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:28:37,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:28:37,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-12 22:28:37,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-12 22:28:37,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-12 22:28:37,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-12 22:28:37,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-12 22:28:37,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-12 22:28:37,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-12 22:28:37,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-12 22:28:37,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:28:37,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:28:37,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:28:37,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:28:37,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:28:37,697 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-12 22:28:38,698 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:28:38,698 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-12 22:28:38,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:28:38 BoogieIcfgContainer [2021-11-12 22:28:38,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:28:38,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:28:38,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:28:38,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:28:38,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:28:37" (1/3) ... [2021-11-12 22:28:38,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2246f9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:28:38, skipping insertion in model container [2021-11-12 22:28:38,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:37" (2/3) ... [2021-11-12 22:28:38,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2246f9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:28:38, skipping insertion in model container [2021-11-12 22:28:38,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:28:38" (3/3) ... [2021-11-12 22:28:38,713 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2021-11-12 22:28:38,720 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-12 22:28:38,720 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:28:38,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:28:38,721 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-12 22:28:38,769 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,769 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,770 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,770 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,770 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,771 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,771 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,771 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,772 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,772 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,772 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,773 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,773 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,773 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,773 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,774 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,774 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,774 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,775 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,775 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,775 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,776 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,776 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,776 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,776 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,777 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,777 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,777 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,778 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,778 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,779 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,779 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,779 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,779 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,780 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,780 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,781 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,781 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,781 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,782 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,782 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,782 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,783 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,783 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,784 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,784 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,784 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,784 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,785 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,785 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,785 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,786 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,786 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,786 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,786 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,787 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,787 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,787 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,788 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,788 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,788 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,789 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,789 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,789 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,790 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,790 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,790 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,790 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,791 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,791 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,792 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,792 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,792 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,792 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,793 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,793 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,793 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,794 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,794 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,794 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,795 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,795 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,795 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,796 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,796 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,797 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,798 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,799 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,799 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,800 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,800 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,801 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,801 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,801 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,802 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,802 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,803 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,804 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,804 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,804 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,805 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,805 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,805 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,805 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,806 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,806 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,806 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,807 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,807 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,807 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,808 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,808 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,809 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,810 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,810 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,810 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,811 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,811 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,811 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,811 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,824 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,830 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,830 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,831 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,831 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,831 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,831 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,832 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,832 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,832 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,833 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,833 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,833 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,834 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,838 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,838 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,838 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,839 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,839 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,839 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,840 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,840 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,840 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,840 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,841 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,841 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,848 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,848 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,849 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,849 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,849 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,849 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,850 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,850 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,850 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,851 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,851 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,851 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,851 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:28:38,854 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-12 22:28:38,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:28:38,939 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:28:38,940 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-12 22:28:38,969 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-12 22:28:38,986 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 150 transitions, 324 flow [2021-11-12 22:28:38,990 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 150 transitions, 324 flow [2021-11-12 22:28:38,992 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 148 places, 150 transitions, 324 flow [2021-11-12 22:28:39,074 INFO L129 PetriNetUnfolder]: 12/147 cut-off events. [2021-11-12 22:28:39,075 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-12 22:28:39,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 147 events. 12/147 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 92 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 109. Up to 2 conditions per place. [2021-11-12 22:28:39,085 INFO L116 LiptonReduction]: Number of co-enabled transitions 1320 [2021-11-12 22:28:59,072 INFO L131 LiptonReduction]: Checked pairs total: 1658 [2021-11-12 22:28:59,072 INFO L133 LiptonReduction]: Total number of compositions: 141 [2021-11-12 22:28:59,096 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 28 transitions, 80 flow [2021-11-12 22:28:59,124 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:28:59,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:28:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 22:28:59,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:59,139 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] [2021-11-12 22:28:59,139 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:28:59,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:59,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2085461792, now seen corresponding path program 1 times [2021-11-12 22:28:59,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:59,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602781008] [2021-11-12 22:28:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:59,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:59,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:59,166 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:59,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:28:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:59,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:28:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:28:59,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:28:59,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:59,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602781008] [2021-11-12 22:28:59,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602781008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:28:59,768 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:28:59,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-12 22:28:59,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324663881] [2021-11-12 22:28:59,771 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:59,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:28:59,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:28:59,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:28:59,804 INFO L87 Difference]: Start difference. First operand has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:00,063 INFO L93 Difference]: Finished difference Result 204 states and 632 transitions. [2021-11-12 22:29:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:29:00,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 20 [2021-11-12 22:29:00,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:00,084 INFO L225 Difference]: With dead ends: 204 [2021-11-12 22:29:00,084 INFO L226 Difference]: Without dead ends: 197 [2021-11-12 22:29:00,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:29:00,089 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 169.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.58ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 214.81ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:00,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 55 Unknown, 0 Unchecked, 1.58ms Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 214.81ms Time] [2021-11-12 22:29:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-12 22:29:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-12 22:29:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 3.13265306122449) internal successors, (614), 196 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 614 transitions. [2021-11-12 22:29:00,225 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 614 transitions. Word has length 20 [2021-11-12 22:29:00,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:00,226 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 614 transitions. [2021-11-12 22:29:00,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:00,228 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 614 transitions. [2021-11-12 22:29:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:29:00,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:00,234 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] [2021-11-12 22:29:00,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:00,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:00,452 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:00,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1235969383, now seen corresponding path program 1 times [2021-11-12 22:29:00,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:00,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103169154] [2021-11-12 22:29:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:00,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:00,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:00,456 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:00,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:29:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:00,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:00,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:00,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:01,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:01,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103169154] [2021-11-12 22:29:01,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103169154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:01,152 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:01,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:29:01,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145754935] [2021-11-12 22:29:01,153 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:01,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:29:01,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:01,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:29:01,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:29:01,159 INFO L87 Difference]: Start difference. First operand 197 states and 614 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:02,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:02,147 INFO L93 Difference]: Finished difference Result 311 states and 915 transitions. [2021-11-12 22:29:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:29:02,149 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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 [2021-11-12 22:29:02,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:02,161 INFO L225 Difference]: With dead ends: 311 [2021-11-12 22:29:02,161 INFO L226 Difference]: Without dead ends: 303 [2021-11-12 22:29:02,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:29:02,164 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 163 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 636.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.49ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 788.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:02,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 11 Invalid, 205 Unknown, 0 Unchecked, 5.49ms Time], IncrementalHoareTripleChecker [4 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 788.02ms Time] [2021-11-12 22:29:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-12 22:29:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 223. [2021-11-12 22:29:02,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.1036036036036037) internal successors, (689), 222 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 689 transitions. [2021-11-12 22:29:02,231 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 689 transitions. Word has length 21 [2021-11-12 22:29:02,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:02,232 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 689 transitions. [2021-11-12 22:29:02,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:02,232 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 689 transitions. [2021-11-12 22:29:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:29:02,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:02,242 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] [2021-11-12 22:29:02,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 22:29:02,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:02,456 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:02,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:02,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1694882913, now seen corresponding path program 1 times [2021-11-12 22:29:02,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:02,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564638403] [2021-11-12 22:29:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:02,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:02,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:02,462 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:02,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:29:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:02,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:02,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:02,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:03,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:03,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564638403] [2021-11-12 22:29:03,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564638403] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:03,071 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:03,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:29:03,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013089420] [2021-11-12 22:29:03,072 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:03,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:29:03,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:03,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:29:03,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:29:03,074 INFO L87 Difference]: Start difference. First operand 223 states and 689 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:03,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:03,991 INFO L93 Difference]: Finished difference Result 319 states and 932 transitions. [2021-11-12 22:29:03,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:29:03,992 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-12 22:29:03,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:03,996 INFO L225 Difference]: With dead ends: 319 [2021-11-12 22:29:03,996 INFO L226 Difference]: Without dead ends: 283 [2021-11-12 22:29:03,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:29:03,999 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 139 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 612.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.56ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 730.60ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:04,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 23 Invalid, 202 Unknown, 0 Unchecked, 3.56ms Time], IncrementalHoareTripleChecker [5 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 730.60ms Time] [2021-11-12 22:29:04,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-12 22:29:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 237. [2021-11-12 22:29:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 3.1059322033898304) internal successors, (733), 236 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 733 transitions. [2021-11-12 22:29:04,027 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 733 transitions. Word has length 21 [2021-11-12 22:29:04,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:04,027 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 733 transitions. [2021-11-12 22:29:04,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 733 transitions. [2021-11-12 22:29:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:29:04,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:04,030 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] [2021-11-12 22:29:04,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:04,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:04,243 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:04,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1755450334, now seen corresponding path program 1 times [2021-11-12 22:29:04,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:04,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214598928] [2021-11-12 22:29:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:04,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:04,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:04,246 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:04,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:29:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:04,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:29:04,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:04,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:04,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:04,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214598928] [2021-11-12 22:29:04,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214598928] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:04,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:29:04,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-12 22:29:04,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340440335] [2021-11-12 22:29:04,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:04,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:29:04,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:04,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:29:04,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:29:04,690 INFO L87 Difference]: Start difference. First operand 237 states and 733 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:05,015 INFO L93 Difference]: Finished difference Result 425 states and 1271 transitions. [2021-11-12 22:29:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:29:05,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 [2021-11-12 22:29:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:05,020 INFO L225 Difference]: With dead ends: 425 [2021-11-12 22:29:05,021 INFO L226 Difference]: Without dead ends: 421 [2021-11-12 22:29:05,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:29:05,022 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 58 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 213.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.26ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 258.11ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:05,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 13 Invalid, 83 Unknown, 0 Unchecked, 1.26ms Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 258.11ms Time] [2021-11-12 22:29:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-12 22:29:05,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 327. [2021-11-12 22:29:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.1165644171779143) internal successors, (1016), 326 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 1016 transitions. [2021-11-12 22:29:05,052 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 1016 transitions. Word has length 21 [2021-11-12 22:29:05,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:05,052 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 1016 transitions. [2021-11-12 22:29:05,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:05,053 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 1016 transitions. [2021-11-12 22:29:05,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:29:05,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:05,055 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] [2021-11-12 22:29:05,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:05,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:05,268 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:05,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:05,269 INFO L85 PathProgramCache]: Analyzing trace with hash -844938271, now seen corresponding path program 2 times [2021-11-12 22:29:05,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:05,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422609831] [2021-11-12 22:29:05,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:29:05,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:05,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:05,271 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:05,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:29:05,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:05,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:05,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:05,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:05,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:05,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:05,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422609831] [2021-11-12 22:29:05,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422609831] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:05,862 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:05,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:29:05,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445112353] [2021-11-12 22:29:05,862 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:05,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:29:05,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:29:05,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:29:05,864 INFO L87 Difference]: Start difference. First operand 327 states and 1016 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:06,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:06,535 INFO L93 Difference]: Finished difference Result 621 states and 1800 transitions. [2021-11-12 22:29:06,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:29:06,536 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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 [2021-11-12 22:29:06,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:06,541 INFO L225 Difference]: With dead ends: 621 [2021-11-12 22:29:06,541 INFO L226 Difference]: Without dead ends: 605 [2021-11-12 22:29:06,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:29:06,543 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 173 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 464.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.84ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 554.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:06,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 7 Invalid, 193 Unknown, 0 Unchecked, 2.84ms Time], IncrementalHoareTripleChecker [5 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 554.03ms Time] [2021-11-12 22:29:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-12 22:29:06,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 365. [2021-11-12 22:29:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.217032967032967) internal successors, (1171), 364 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1171 transitions. [2021-11-12 22:29:06,569 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1171 transitions. Word has length 21 [2021-11-12 22:29:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:06,570 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 1171 transitions. [2021-11-12 22:29:06,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:06,570 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1171 transitions. [2021-11-12 22:29:06,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:29:06,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:06,572 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] [2021-11-12 22:29:06,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:06,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:06,791 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:06,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:06,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1224762973, now seen corresponding path program 3 times [2021-11-12 22:29:06,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:06,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468886117] [2021-11-12 22:29:06,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:29:06,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:06,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:06,795 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:06,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:29:06,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:29:06,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:06,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:06,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:07,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:07,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:07,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468886117] [2021-11-12 22:29:07,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468886117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:07,397 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:07,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:29:07,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582015331] [2021-11-12 22:29:07,402 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:07,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:29:07,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:07,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:29:07,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:29:07,403 INFO L87 Difference]: Start difference. First operand 365 states and 1171 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:08,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:08,292 INFO L93 Difference]: Finished difference Result 493 states and 1471 transitions. [2021-11-12 22:29:08,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:29:08,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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 [2021-11-12 22:29:08,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:08,303 INFO L225 Difference]: With dead ends: 493 [2021-11-12 22:29:08,303 INFO L226 Difference]: Without dead ends: 475 [2021-11-12 22:29:08,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:29:08,304 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 184 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 607.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.50ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 724.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:08,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 7 Invalid, 243 Unknown, 0 Unchecked, 3.50ms Time], IncrementalHoareTripleChecker [11 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 724.14ms Time] [2021-11-12 22:29:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-11-12 22:29:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 359. [2021-11-12 22:29:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.189944134078212) internal successors, (1142), 358 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1142 transitions. [2021-11-12 22:29:08,328 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1142 transitions. Word has length 21 [2021-11-12 22:29:08,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:08,328 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1142 transitions. [2021-11-12 22:29:08,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1142 transitions. [2021-11-12 22:29:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:29:08,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:08,331 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] [2021-11-12 22:29:08,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:08,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:08,548 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:08,548 INFO L85 PathProgramCache]: Analyzing trace with hash 13842791, now seen corresponding path program 2 times [2021-11-12 22:29:08,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:08,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694484527] [2021-11-12 22:29:08,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:29:08,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:08,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:08,550 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:08,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:29:08,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:08,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:08,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:08,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:09,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:09,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:09,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694484527] [2021-11-12 22:29:09,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694484527] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:09,238 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:09,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:29:09,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003839549] [2021-11-12 22:29:09,238 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:09,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:29:09,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:09,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:29:09,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:29:09,240 INFO L87 Difference]: Start difference. First operand 359 states and 1142 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:10,226 INFO L93 Difference]: Finished difference Result 527 states and 1633 transitions. [2021-11-12 22:29:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:29:10,227 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-12 22:29:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:10,233 INFO L225 Difference]: With dead ends: 527 [2021-11-12 22:29:10,233 INFO L226 Difference]: Without dead ends: 513 [2021-11-12 22:29:10,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:29:10,234 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 180 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 657.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.27ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 788.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:10,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 26 Invalid, 258 Unknown, 0 Unchecked, 3.27ms Time], IncrementalHoareTripleChecker [9 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 788.94ms Time] [2021-11-12 22:29:10,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-11-12 22:29:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 399. [2021-11-12 22:29:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.291457286432161) internal successors, (1310), 398 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1310 transitions. [2021-11-12 22:29:10,267 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1310 transitions. Word has length 21 [2021-11-12 22:29:10,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:10,268 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1310 transitions. [2021-11-12 22:29:10,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:10,269 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1310 transitions. [2021-11-12 22:29:10,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:29:10,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:10,271 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] [2021-11-12 22:29:10,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:10,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:10,484 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash -717730827, now seen corresponding path program 3 times [2021-11-12 22:29:10,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:10,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6395178] [2021-11-12 22:29:10,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:29:10,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:10,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:10,486 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:10,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:29:10,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:29:10,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:10,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:10,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:10,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:11,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:11,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6395178] [2021-11-12 22:29:11,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6395178] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:11,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:29:11,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-12 22:29:11,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315038481] [2021-11-12 22:29:11,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:11,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:29:11,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:11,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:29:11,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:29:11,137 INFO L87 Difference]: Start difference. First operand 399 states and 1310 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:11,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:11,748 INFO L93 Difference]: Finished difference Result 529 states and 1646 transitions. [2021-11-12 22:29:11,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:11,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 [2021-11-12 22:29:11,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:11,755 INFO L225 Difference]: With dead ends: 529 [2021-11-12 22:29:11,755 INFO L226 Difference]: Without dead ends: 493 [2021-11-12 22:29:11,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:29:11,756 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 71 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 426.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.63ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 500.99ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:11,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 11 Invalid, 132 Unknown, 0 Unchecked, 1.63ms Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 500.99ms Time] [2021-11-12 22:29:11,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-11-12 22:29:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 351. [2021-11-12 22:29:11,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.262857142857143) internal successors, (1142), 350 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1142 transitions. [2021-11-12 22:29:11,778 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1142 transitions. Word has length 21 [2021-11-12 22:29:11,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:11,778 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1142 transitions. [2021-11-12 22:29:11,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1142 transitions. [2021-11-12 22:29:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:29:11,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:11,780 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] [2021-11-12 22:29:11,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-12 22:29:11,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:11,995 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:11,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:11,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1461306779, now seen corresponding path program 4 times [2021-11-12 22:29:11,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:11,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032552438] [2021-11-12 22:29:11,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:29:11,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:11,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:11,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:12,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:29:12,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:29:12,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:12,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:12,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:12,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:12,445 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:12,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032552438] [2021-11-12 22:29:12,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032552438] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:12,445 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:12,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:29:12,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576493779] [2021-11-12 22:29:12,446 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:12,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:29:12,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:12,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:29:12,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:29:12,448 INFO L87 Difference]: Start difference. First operand 351 states and 1142 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:13,214 INFO L93 Difference]: Finished difference Result 763 states and 2322 transitions. [2021-11-12 22:29:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:29:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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 [2021-11-12 22:29:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:13,221 INFO L225 Difference]: With dead ends: 763 [2021-11-12 22:29:13,221 INFO L226 Difference]: Without dead ends: 723 [2021-11-12 22:29:13,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:29:13,223 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 197 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 547.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.95ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 634.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:13,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 9 Invalid, 288 Unknown, 0 Unchecked, 2.95ms Time], IncrementalHoareTripleChecker [12 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 634.55ms Time] [2021-11-12 22:29:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-11-12 22:29:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 355. [2021-11-12 22:29:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.231638418079096) internal successors, (1144), 354 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1144 transitions. [2021-11-12 22:29:13,248 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1144 transitions. Word has length 21 [2021-11-12 22:29:13,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:13,249 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1144 transitions. [2021-11-12 22:29:13,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:13,250 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1144 transitions. [2021-11-12 22:29:13,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:29:13,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:13,256 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] [2021-11-12 22:29:13,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:13,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:13,468 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:13,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:13,468 INFO L85 PathProgramCache]: Analyzing trace with hash 608394465, now seen corresponding path program 5 times [2021-11-12 22:29:13,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:13,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016890257] [2021-11-12 22:29:13,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:29:13,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:13,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:13,470 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:13,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:29:13,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:13,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:13,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:13,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:13,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:13,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:13,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016890257] [2021-11-12 22:29:13,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016890257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:13,981 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:13,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:29:13,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998733722] [2021-11-12 22:29:13,981 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:13,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:29:13,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:13,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:29:13,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:29:13,983 INFO L87 Difference]: Start difference. First operand 355 states and 1144 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:14,796 INFO L93 Difference]: Finished difference Result 519 states and 1619 transitions. [2021-11-12 22:29:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:29:14,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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 [2021-11-12 22:29:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:14,802 INFO L225 Difference]: With dead ends: 519 [2021-11-12 22:29:14,802 INFO L226 Difference]: Without dead ends: 497 [2021-11-12 22:29:14,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:29:14,803 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 188 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 568.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.47ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 654.77ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:14,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 10 Invalid, 218 Unknown, 0 Unchecked, 6.47ms Time], IncrementalHoareTripleChecker [14 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 654.77ms Time] [2021-11-12 22:29:14,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-12 22:29:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 309. [2021-11-12 22:29:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1103896103896105) internal successors, (958), 308 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 958 transitions. [2021-11-12 22:29:14,822 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 958 transitions. Word has length 21 [2021-11-12 22:29:14,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:14,823 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 958 transitions. [2021-11-12 22:29:14,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:14,824 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 958 transitions. [2021-11-12 22:29:14,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:29:14,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:14,825 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] [2021-11-12 22:29:14,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:15,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:15,038 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:15,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:15,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1618069977, now seen corresponding path program 6 times [2021-11-12 22:29:15,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:15,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697251425] [2021-11-12 22:29:15,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:29:15,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:15,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:15,040 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:15,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:29:15,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:29:15,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:15,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:15,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:15,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:15,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:15,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697251425] [2021-11-12 22:29:15,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697251425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:15,491 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:15,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:29:15,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367273277] [2021-11-12 22:29:15,492 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:15,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:29:15,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:15,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:29:15,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:29:15,493 INFO L87 Difference]: Start difference. First operand 309 states and 958 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:15,974 INFO L93 Difference]: Finished difference Result 401 states and 1250 transitions. [2021-11-12 22:29:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:15,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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 [2021-11-12 22:29:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:15,978 INFO L225 Difference]: With dead ends: 401 [2021-11-12 22:29:15,978 INFO L226 Difference]: Without dead ends: 361 [2021-11-12 22:29:15,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:29:15,979 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 102 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 381.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 442.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:15,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 12 Invalid, 221 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [3 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 442.62ms Time] [2021-11-12 22:29:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-12 22:29:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 253. [2021-11-12 22:29:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 3.134920634920635) internal successors, (790), 252 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 790 transitions. [2021-11-12 22:29:15,993 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 790 transitions. Word has length 21 [2021-11-12 22:29:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:15,993 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 790 transitions. [2021-11-12 22:29:15,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 790 transitions. [2021-11-12 22:29:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:29:15,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:15,995 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] [2021-11-12 22:29:16,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-12 22:29:16,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:16,208 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:16,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:16,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1232979035, now seen corresponding path program 4 times [2021-11-12 22:29:16,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:16,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244546012] [2021-11-12 22:29:16,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:29:16,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:16,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:16,210 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:16,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:29:16,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:29:16,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:16,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:16,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:16,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:16,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:16,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244546012] [2021-11-12 22:29:16,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244546012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:16,708 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:16,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:29:16,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803651301] [2021-11-12 22:29:16,708 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:16,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:29:16,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:16,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:29:16,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:29:16,710 INFO L87 Difference]: Start difference. First operand 253 states and 790 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:17,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:17,469 INFO L93 Difference]: Finished difference Result 281 states and 833 transitions. [2021-11-12 22:29:17,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:29:17,471 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-12 22:29:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:17,473 INFO L225 Difference]: With dead ends: 281 [2021-11-12 22:29:17,473 INFO L226 Difference]: Without dead ends: 267 [2021-11-12 22:29:17,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:29:17,474 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 127 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 481.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 552.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:17,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 20 Invalid, 165 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 552.68ms Time] [2021-11-12 22:29:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-12 22:29:17,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247. [2021-11-12 22:29:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 3.0772357723577235) internal successors, (757), 246 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 757 transitions. [2021-11-12 22:29:17,486 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 757 transitions. Word has length 21 [2021-11-12 22:29:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:17,486 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 757 transitions. [2021-11-12 22:29:17,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:17,487 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 757 transitions. [2021-11-12 22:29:17,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:29:17,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:17,488 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] [2021-11-12 22:29:17,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:17,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:17,700 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:17,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:17,700 INFO L85 PathProgramCache]: Analyzing trace with hash 501405417, now seen corresponding path program 5 times [2021-11-12 22:29:17,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:17,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556403910] [2021-11-12 22:29:17,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:29:17,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:17,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:17,702 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:17,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:29:17,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:17,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:17,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:29:17,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:18,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:18,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:18,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556403910] [2021-11-12 22:29:18,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556403910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:18,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [458598560] [2021-11-12 22:29:18,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:29:18,738 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:18,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:18,744 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:18,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 22:29:18,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:18,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:18,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:18,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:19,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:19,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [458598560] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:19,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:29:19,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8, 6] total 22 [2021-11-12 22:29:19,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312624443] [2021-11-12 22:29:19,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:19,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:29:19,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:19,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:29:19,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:29:19,349 INFO L87 Difference]: Start difference. First operand 247 states and 757 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:19,779 INFO L93 Difference]: Finished difference Result 305 states and 917 transitions. [2021-11-12 22:29:19,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:29:19,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 [2021-11-12 22:29:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:19,782 INFO L225 Difference]: With dead ends: 305 [2021-11-12 22:29:19,782 INFO L226 Difference]: Without dead ends: 287 [2021-11-12 22:29:19,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:29:19,783 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 51 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 274.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 320.87ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:19,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 12 Invalid, 113 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 320.87ms Time] [2021-11-12 22:29:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-12 22:29:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 235. [2021-11-12 22:29:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.0128205128205128) internal successors, (705), 234 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 705 transitions. [2021-11-12 22:29:19,795 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 705 transitions. Word has length 21 [2021-11-12 22:29:19,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:19,795 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 705 transitions. [2021-11-12 22:29:19,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:19,795 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 705 transitions. [2021-11-12 22:29:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:29:19,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:19,797 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] [2021-11-12 22:29:19,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-12 22:29:20,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:20,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:20,211 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1541641215, now seen corresponding path program 6 times [2021-11-12 22:29:20,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:20,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050332486] [2021-11-12 22:29:20,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:29:20,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:20,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:20,214 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:20,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:29:20,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:29:20,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:20,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:20,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:20,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:20,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:20,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050332486] [2021-11-12 22:29:20,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050332486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:20,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1451253256] [2021-11-12 22:29:20,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:29:20,781 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:20,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:20,784 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:20,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:29:21,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:29:21,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:21,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:21,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:21,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:21,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1451253256] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:21,351 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:29:21,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6] total 17 [2021-11-12 22:29:21,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380375073] [2021-11-12 22:29:21,352 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:21,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:29:21,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:21,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:29:21,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:29:21,353 INFO L87 Difference]: Start difference. First operand 235 states and 705 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:21,817 INFO L93 Difference]: Finished difference Result 211 states and 629 transitions. [2021-11-12 22:29:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:29:21,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 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 [2021-11-12 22:29:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:21,820 INFO L225 Difference]: With dead ends: 211 [2021-11-12 22:29:21,820 INFO L226 Difference]: Without dead ends: 190 [2021-11-12 22:29:21,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:29:21,821 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 347.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.17ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 395.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:21,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 28 Invalid, 202 Unknown, 0 Unchecked, 1.17ms Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 395.01ms Time] [2021-11-12 22:29:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-12 22:29:21,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-11-12 22:29:21,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 3.1481481481481484) internal successors, (595), 189 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:21,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 595 transitions. [2021-11-12 22:29:21,830 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 595 transitions. Word has length 21 [2021-11-12 22:29:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:21,830 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 595 transitions. [2021-11-12 22:29:21,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 595 transitions. [2021-11-12 22:29:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:21,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:21,831 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] [2021-11-12 22:29:21,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:22,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:22,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:22,237 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:22,238 INFO L85 PathProgramCache]: Analyzing trace with hash 197650488, now seen corresponding path program 1 times [2021-11-12 22:29:22,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:22,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157139025] [2021-11-12 22:29:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:22,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:22,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:22,239 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:22,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:29:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:22,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:29:22,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:22,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:22,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:22,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157139025] [2021-11-12 22:29:22,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157139025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:22,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1870652507] [2021-11-12 22:29:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:22,983 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:22,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:22,984 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:23,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 22:29:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:23,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:29:23,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:23,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:23,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1870652507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:23,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158181489] [2021-11-12 22:29:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:23,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:23,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:23,573 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:23,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-12 22:29:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:23,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:29:23,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:23,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:24,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158181489] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:24,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:29:24,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 8] total 28 [2021-11-12 22:29:24,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568583169] [2021-11-12 22:29:24,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:24,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:24,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:24,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:24,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:29:24,009 INFO L87 Difference]: Start difference. First operand 190 states and 595 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:29:24,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:24,632 INFO L93 Difference]: Finished difference Result 260 states and 783 transitions. [2021-11-12 22:29:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:24,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:29:24,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:24,635 INFO L225 Difference]: With dead ends: 260 [2021-11-12 22:29:24,635 INFO L226 Difference]: Without dead ends: 260 [2021-11-12 22:29:24,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:29:24,636 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 71 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 490.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 564.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:24,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 17 Invalid, 263 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [3 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 564.58ms Time] [2021-11-12 22:29:24,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-12 22:29:24,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 220. [2021-11-12 22:29:24,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 3.1095890410958904) internal successors, (681), 219 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 681 transitions. [2021-11-12 22:29:24,654 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 681 transitions. Word has length 22 [2021-11-12 22:29:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:24,657 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 681 transitions. [2021-11-12 22:29:24,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:29:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 681 transitions. [2021-11-12 22:29:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:24,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:24,659 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] [2021-11-12 22:29:24,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:24,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:25,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-12 22:29:25,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:25,262 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:25,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:25,262 INFO L85 PathProgramCache]: Analyzing trace with hash 830460954, now seen corresponding path program 2 times [2021-11-12 22:29:25,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:25,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458101327] [2021-11-12 22:29:25,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:29:25,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:25,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:25,264 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:25,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:29:25,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:25,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:25,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:29:25,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:25,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:26,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:26,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458101327] [2021-11-12 22:29:26,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458101327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:26,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [761830922] [2021-11-12 22:29:26,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:29:26,191 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:26,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:26,197 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:26,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 22:29:26,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:26,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:26,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:29:26,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:26,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:26,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [761830922] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:26,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:29:26,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 9, 6] total 24 [2021-11-12 22:29:26,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443369813] [2021-11-12 22:29:26,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:26,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:26,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:26,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:26,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:29:26,768 INFO L87 Difference]: Start difference. First operand 220 states and 681 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-12 22:29:27,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:27,185 INFO L93 Difference]: Finished difference Result 338 states and 1039 transitions. [2021-11-12 22:29:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:27,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 [2021-11-12 22:29:27,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:27,189 INFO L225 Difference]: With dead ends: 338 [2021-11-12 22:29:27,190 INFO L226 Difference]: Without dead ends: 338 [2021-11-12 22:29:27,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:29:27,191 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 90 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 302.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.28ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 356.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:27,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 12 Invalid, 121 Unknown, 0 Unchecked, 1.28ms Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 356.53ms Time] [2021-11-12 22:29:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-12 22:29:27,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 254. [2021-11-12 22:29:27,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.233201581027668) internal successors, (818), 253 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 818 transitions. [2021-11-12 22:29:27,203 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 818 transitions. Word has length 22 [2021-11-12 22:29:27,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:27,203 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 818 transitions. [2021-11-12 22:29:27,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-12 22:29:27,204 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 818 transitions. [2021-11-12 22:29:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:27,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:27,205 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] [2021-11-12 22:29:27,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:27,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-12 22:29:27,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:27,618 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:27,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:27,618 INFO L85 PathProgramCache]: Analyzing trace with hash 778749224, now seen corresponding path program 3 times [2021-11-12 22:29:27,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:27,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858904999] [2021-11-12 22:29:27,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:29:27,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:27,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:27,619 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:27,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:29:27,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:29:27,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:27,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:29:27,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:28,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:28,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:28,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858904999] [2021-11-12 22:29:28,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858904999] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:28,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1098389994] [2021-11-12 22:29:28,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:29:28,514 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:28,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:28,515 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:28,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 22:29:28,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:29:28,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:28,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:29:28,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:28,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:29,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1098389994] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:29,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:29:29,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 9, 6] total 24 [2021-11-12 22:29:29,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42594100] [2021-11-12 22:29:29,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:29,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:29,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:29,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:29,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:29:29,050 INFO L87 Difference]: Start difference. First operand 254 states and 818 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-12 22:29:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:29,454 INFO L93 Difference]: Finished difference Result 350 states and 1067 transitions. [2021-11-12 22:29:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:29,454 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 [2021-11-12 22:29:29,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:29,457 INFO L225 Difference]: With dead ends: 350 [2021-11-12 22:29:29,457 INFO L226 Difference]: Without dead ends: 350 [2021-11-12 22:29:29,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:29:29,458 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 82 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 277.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 348.57ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:29,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 12 Invalid, 124 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 348.57ms Time] [2021-11-12 22:29:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-12 22:29:29,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 258. [2021-11-12 22:29:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.2217898832684826) internal successors, (828), 257 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 828 transitions. [2021-11-12 22:29:29,470 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 828 transitions. Word has length 22 [2021-11-12 22:29:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:29,470 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 828 transitions. [2021-11-12 22:29:29,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-12 22:29:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 828 transitions. [2021-11-12 22:29:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:29,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:29,472 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] [2021-11-12 22:29:29,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-12 22:29:29,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:29,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:29,877 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:29,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2016244488, now seen corresponding path program 4 times [2021-11-12 22:29:29,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:29,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093212416] [2021-11-12 22:29:29,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:29:29,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:29,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:29,878 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:29,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:29:29,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:29:29,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:29,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:29:29,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:30,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:30,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:30,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093212416] [2021-11-12 22:29:30,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093212416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:30,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1469991147] [2021-11-12 22:29:30,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:29:30,487 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:30,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:30,488 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:30,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 22:29:30,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:29:30,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:30,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:29:30,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:30,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:30,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1469991147] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:30,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239954836] [2021-11-12 22:29:30,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:29:30,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:30,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:30,948 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:30,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-12 22:29:31,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:29:31,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:31,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:29:31,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:31,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:31,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239954836] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:31,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:29:31,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 8] total 26 [2021-11-12 22:29:31,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691585644] [2021-11-12 22:29:31,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:31,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:31,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:31,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:31,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:29:31,388 INFO L87 Difference]: Start difference. First operand 258 states and 828 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:29:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:31,990 INFO L93 Difference]: Finished difference Result 336 states and 1048 transitions. [2021-11-12 22:29:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:29:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:31,993 INFO L225 Difference]: With dead ends: 336 [2021-11-12 22:29:31,994 INFO L226 Difference]: Without dead ends: 336 [2021-11-12 22:29:31,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:29:31,995 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 460.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 544.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:31,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 17 Invalid, 231 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [2 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 544.43ms Time] [2021-11-12 22:29:31,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-12 22:29:32,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 270. [2021-11-12 22:29:32,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.2267657992565058) internal successors, (868), 269 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 868 transitions. [2021-11-12 22:29:32,007 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 868 transitions. Word has length 22 [2021-11-12 22:29:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:32,008 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 868 transitions. [2021-11-12 22:29:32,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:29:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 868 transitions. [2021-11-12 22:29:32,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:32,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:32,009 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] [2021-11-12 22:29:32,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-12 22:29:32,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-12 22:29:32,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:32,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:32,622 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:32,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:32,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2050379576, now seen corresponding path program 5 times [2021-11-12 22:29:32,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:32,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696942423] [2021-11-12 22:29:32,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:29:32,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:32,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:32,623 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:32,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:29:32,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:32,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:32,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:29:32,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:33,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:33,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:33,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696942423] [2021-11-12 22:29:33,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696942423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:33,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1042770076] [2021-11-12 22:29:33,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:29:33,303 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:33,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:33,304 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:33,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-12 22:29:33,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:33,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:33,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:29:33,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:33,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:33,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1042770076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:33,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323014236] [2021-11-12 22:29:33,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:29:33,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:33,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:33,947 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:33,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-12 22:29:34,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:34,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:34,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:29:34,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:34,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:34,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323014236] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:34,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:29:34,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 8] total 27 [2021-11-12 22:29:34,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676299330] [2021-11-12 22:29:34,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:34,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:34,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:34,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:34,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:29:34,419 INFO L87 Difference]: Start difference. First operand 270 states and 868 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:29:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:35,185 INFO L93 Difference]: Finished difference Result 366 states and 1132 transitions. [2021-11-12 22:29:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:35,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:29:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:35,188 INFO L225 Difference]: With dead ends: 366 [2021-11-12 22:29:35,188 INFO L226 Difference]: Without dead ends: 366 [2021-11-12 22:29:35,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:29:35,189 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 80 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 543.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 644.71ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:35,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 15 Invalid, 271 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 644.71ms Time] [2021-11-12 22:29:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-12 22:29:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 276. [2021-11-12 22:29:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.272727272727273) internal successors, (900), 275 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 900 transitions. [2021-11-12 22:29:35,203 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 900 transitions. Word has length 22 [2021-11-12 22:29:35,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:35,204 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 900 transitions. [2021-11-12 22:29:35,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:29:35,204 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 900 transitions. [2021-11-12 22:29:35,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:35,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:35,206 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] [2021-11-12 22:29:35,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-12 22:29:35,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-12 22:29:35,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-12 22:29:35,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:35,819 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:35,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:35,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2102091306, now seen corresponding path program 6 times [2021-11-12 22:29:35,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:35,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313323120] [2021-11-12 22:29:35,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:29:35,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:35,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:35,822 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:35,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 22:29:35,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:29:35,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:35,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:29:35,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:36,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:36,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:36,591 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:36,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313323120] [2021-11-12 22:29:36,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313323120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:36,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1682529018] [2021-11-12 22:29:36,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:29:36,592 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:36,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:36,593 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:36,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 22:29:36,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:29:36,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:36,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:29:36,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:37,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:37,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1682529018] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:37,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:29:37,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 9, 6] total 23 [2021-11-12 22:29:37,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522573137] [2021-11-12 22:29:37,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:37,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:37,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:37,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:37,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:29:37,164 INFO L87 Difference]: Start difference. First operand 276 states and 900 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-12 22:29:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:37,565 INFO L93 Difference]: Finished difference Result 388 states and 1237 transitions. [2021-11-12 22:29:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:37,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 [2021-11-12 22:29:37,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:37,568 INFO L225 Difference]: With dead ends: 388 [2021-11-12 22:29:37,568 INFO L226 Difference]: Without dead ends: 388 [2021-11-12 22:29:37,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:29:37,569 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 61 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 296.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.96ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 338.40ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:37,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 13 Invalid, 119 Unknown, 0 Unchecked, 0.96ms Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 338.40ms Time] [2021-11-12 22:29:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-12 22:29:37,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 286. [2021-11-12 22:29:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.319298245614035) internal successors, (946), 285 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 946 transitions. [2021-11-12 22:29:37,582 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 946 transitions. Word has length 22 [2021-11-12 22:29:37,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:37,583 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 946 transitions. [2021-11-12 22:29:37,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-12 22:29:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 946 transitions. [2021-11-12 22:29:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:37,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:37,585 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] [2021-11-12 22:29:37,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:37,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-12 22:29:37,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:37,987 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:37,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1419630574, now seen corresponding path program 7 times [2021-11-12 22:29:37,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:37,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362580350] [2021-11-12 22:29:37,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:29:37,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:37,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:37,989 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:37,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 22:29:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:38,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:29:38,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:38,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:38,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:38,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362580350] [2021-11-12 22:29:38,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362580350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:38,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [662094482] [2021-11-12 22:29:38,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:29:38,651 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:38,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:38,652 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:38,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-12 22:29:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:38,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:29:38,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:39,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:39,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [662094482] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:39,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037226604] [2021-11-12 22:29:39,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:29:39,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:39,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:39,357 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:39,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-12 22:29:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:39,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:29:39,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:39,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:40,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037226604] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:40,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:29:40,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 9] total 31 [2021-11-12 22:29:40,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377780070] [2021-11-12 22:29:40,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:40,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:40,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:40,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:40,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2021-11-12 22:29:40,045 INFO L87 Difference]: Start difference. First operand 286 states and 946 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:29:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:40,787 INFO L93 Difference]: Finished difference Result 556 states and 1752 transitions. [2021-11-12 22:29:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:40,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:29:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:40,794 INFO L225 Difference]: With dead ends: 556 [2021-11-12 22:29:40,794 INFO L226 Difference]: Without dead ends: 556 [2021-11-12 22:29:40,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 22:29:40,795 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 71 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 522.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.69ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 615.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:40,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 11 Invalid, 261 Unknown, 0 Unchecked, 1.69ms Time], IncrementalHoareTripleChecker [5 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 615.34ms Time] [2021-11-12 22:29:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-12 22:29:40,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 290. [2021-11-12 22:29:40,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.332179930795848) internal successors, (963), 289 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 963 transitions. [2021-11-12 22:29:40,809 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 963 transitions. Word has length 22 [2021-11-12 22:29:40,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:40,810 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 963 transitions. [2021-11-12 22:29:40,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:29:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 963 transitions. [2021-11-12 22:29:40,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:40,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:40,812 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] [2021-11-12 22:29:40,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:41,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-12 22:29:41,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-12 22:29:41,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:41,414 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:41,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:41,415 INFO L85 PathProgramCache]: Analyzing trace with hash 633641080, now seen corresponding path program 8 times [2021-11-12 22:29:41,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:41,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828714196] [2021-11-12 22:29:41,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:29:41,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:41,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:41,416 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:41,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 22:29:41,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:41,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:41,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:29:41,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:41,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:42,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:42,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828714196] [2021-11-12 22:29:42,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828714196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:42,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [900258694] [2021-11-12 22:29:42,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:29:42,250 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:42,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:42,251 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:42,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-12 22:29:42,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:42,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:42,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:29:42,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:42,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:42,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [900258694] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:42,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:29:42,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10, 6] total 25 [2021-11-12 22:29:42,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995462516] [2021-11-12 22:29:42,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:42,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:42,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:42,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:42,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:29:42,785 INFO L87 Difference]: Start difference. First operand 290 states and 963 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-12 22:29:43,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:43,178 INFO L93 Difference]: Finished difference Result 366 states and 1165 transitions. [2021-11-12 22:29:43,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:43,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 [2021-11-12 22:29:43,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:43,181 INFO L225 Difference]: With dead ends: 366 [2021-11-12 22:29:43,181 INFO L226 Difference]: Without dead ends: 366 [2021-11-12 22:29:43,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:29:43,182 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 84 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 290.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.14ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 337.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:43,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 16 Invalid, 150 Unknown, 0 Unchecked, 1.14ms Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 337.33ms Time] [2021-11-12 22:29:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-12 22:29:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 278. [2021-11-12 22:29:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.270758122743682) internal successors, (906), 277 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 906 transitions. [2021-11-12 22:29:43,193 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 906 transitions. Word has length 22 [2021-11-12 22:29:43,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:43,194 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 906 transitions. [2021-11-12 22:29:43,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-12 22:29:43,194 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 906 transitions. [2021-11-12 22:29:43,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:43,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:43,196 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] [2021-11-12 22:29:43,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:43,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-11-12 22:29:43,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:43,598 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:43,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:43,599 INFO L85 PathProgramCache]: Analyzing trace with hash -299736456, now seen corresponding path program 9 times [2021-11-12 22:29:43,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:43,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005964015] [2021-11-12 22:29:43,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:29:43,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:43,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:43,601 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:43,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 22:29:43,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:29:43,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:43,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:29:43,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:44,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:44,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:44,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005964015] [2021-11-12 22:29:44,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005964015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:44,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1134240354] [2021-11-12 22:29:44,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:29:44,466 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:44,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:44,467 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:44,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-12 22:29:44,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:29:44,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:44,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:29:44,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:44,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:45,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1134240354] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:45,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:29:45,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10, 6] total 24 [2021-11-12 22:29:45,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478469598] [2021-11-12 22:29:45,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:45,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:45,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:45,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:29:45,016 INFO L87 Difference]: Start difference. First operand 278 states and 906 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-12 22:29:45,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:45,387 INFO L93 Difference]: Finished difference Result 348 states and 1109 transitions. [2021-11-12 22:29:45,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:45,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 [2021-11-12 22:29:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:45,390 INFO L225 Difference]: With dead ends: 348 [2021-11-12 22:29:45,390 INFO L226 Difference]: Without dead ends: 348 [2021-11-12 22:29:45,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:29:45,391 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 278.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.87ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 318.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:45,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 147 Unknown, 0 Unchecked, 0.87ms Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 318.07ms Time] [2021-11-12 22:29:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-12 22:29:45,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 280. [2021-11-12 22:29:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.2652329749103943) internal successors, (911), 279 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 911 transitions. [2021-11-12 22:29:45,402 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 911 transitions. Word has length 22 [2021-11-12 22:29:45,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:45,402 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 911 transitions. [2021-11-12 22:29:45,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-12 22:29:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 911 transitions. [2021-11-12 22:29:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:45,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:45,404 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] [2021-11-12 22:29:45,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:45,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-12 22:29:45,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:45,807 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:45,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1316559326, now seen corresponding path program 10 times [2021-11-12 22:29:45,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:45,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241662783] [2021-11-12 22:29:45,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:29:45,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:45,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:45,809 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:45,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-12 22:29:45,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:29:45,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:45,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:29:45,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:46,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:46,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:46,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241662783] [2021-11-12 22:29:46,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241662783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:46,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1388749195] [2021-11-12 22:29:46,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:29:46,533 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:46,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:46,534 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:46,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-12 22:29:46,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:29:46,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:46,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:29:46,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:46,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:47,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1388749195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:47,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003273978] [2021-11-12 22:29:47,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:29:47,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:47,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:47,106 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:47,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-12 22:29:47,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:29:47,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:47,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:29:47,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:47,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:47,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003273978] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:47,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:29:47,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 9] total 30 [2021-11-12 22:29:47,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568938727] [2021-11-12 22:29:47,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:47,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:47,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:47,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:47,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:29:47,719 INFO L87 Difference]: Start difference. First operand 280 states and 911 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:29:48,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:48,581 INFO L93 Difference]: Finished difference Result 482 states and 1570 transitions. [2021-11-12 22:29:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:48,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:29:48,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:48,585 INFO L225 Difference]: With dead ends: 482 [2021-11-12 22:29:48,585 INFO L226 Difference]: Without dead ends: 482 [2021-11-12 22:29:48,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 22:29:48,586 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 571.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 658.17ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:48,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 12 Invalid, 279 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [6 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 658.17ms Time] [2021-11-12 22:29:48,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-12 22:29:48,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 282. [2021-11-12 22:29:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.2740213523131674) internal successors, (920), 281 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 920 transitions. [2021-11-12 22:29:48,599 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 920 transitions. Word has length 22 [2021-11-12 22:29:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:48,600 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 920 transitions. [2021-11-12 22:29:48,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:29:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 920 transitions. [2021-11-12 22:29:48,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:48,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:48,602 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] [2021-11-12 22:29:48,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-12 22:29:48,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:49,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2021-11-12 22:29:49,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:49,226 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:49,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:49,226 INFO L85 PathProgramCache]: Analyzing trace with hash 334106466, now seen corresponding path program 11 times [2021-11-12 22:29:49,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:49,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859514847] [2021-11-12 22:29:49,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:29:49,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:49,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:49,228 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:49,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-12 22:29:49,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:49,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:49,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:29:49,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:49,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:50,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:50,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859514847] [2021-11-12 22:29:50,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859514847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:50,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1273382208] [2021-11-12 22:29:50,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:29:50,106 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:50,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:50,107 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:50,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-12 22:29:50,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:50,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:50,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:29:50,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:50,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:50,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1273382208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:50,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880410211] [2021-11-12 22:29:50,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:29:50,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:50,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:50,765 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:50,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-12 22:29:50,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:29:50,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:50,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:29:50,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:51,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:51,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880410211] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:51,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:29:51,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 9] total 36 [2021-11-12 22:29:51,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66385421] [2021-11-12 22:29:51,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:51,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:51,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:51,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=975, Unknown=0, NotChecked=0, Total=1260 [2021-11-12 22:29:51,616 INFO L87 Difference]: Start difference. First operand 282 states and 920 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:29:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:52,836 INFO L93 Difference]: Finished difference Result 596 states and 1778 transitions. [2021-11-12 22:29:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:29:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:29:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:52,841 INFO L225 Difference]: With dead ends: 596 [2021-11-12 22:29:52,841 INFO L226 Difference]: Without dead ends: 596 [2021-11-12 22:29:52,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=371, Invalid=1269, Unknown=0, NotChecked=0, Total=1640 [2021-11-12 22:29:52,843 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 84 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 755.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 879.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:52,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 11 Invalid, 317 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [10 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 879.86ms Time] [2021-11-12 22:29:52,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-12 22:29:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 290. [2021-11-12 22:29:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.3217993079584773) internal successors, (960), 289 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 960 transitions. [2021-11-12 22:29:52,854 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 960 transitions. Word has length 22 [2021-11-12 22:29:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:52,854 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 960 transitions. [2021-11-12 22:29:52,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:29:52,855 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 960 transitions. [2021-11-12 22:29:52,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:52,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:52,857 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] [2021-11-12 22:29:52,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:53,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:53,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2021-11-12 22:29:53,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:53,470 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:53,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:53,470 INFO L85 PathProgramCache]: Analyzing trace with hash 70296264, now seen corresponding path program 12 times [2021-11-12 22:29:53,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:53,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843001199] [2021-11-12 22:29:53,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:29:53,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:53,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:53,472 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:53,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-12 22:29:53,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:29:53,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:53,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:29:53,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:53,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:54,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:54,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843001199] [2021-11-12 22:29:54,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843001199] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:54,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2076263269] [2021-11-12 22:29:54,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:29:54,320 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:54,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:54,321 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:54,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-12 22:29:54,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:29:54,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:54,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:29:54,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:54,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:54,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2076263269] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:54,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:29:54,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 10, 6] total 25 [2021-11-12 22:29:54,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590909923] [2021-11-12 22:29:54,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:54,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:54,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:54,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:29:54,967 INFO L87 Difference]: Start difference. First operand 290 states and 960 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-12 22:29:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:55,375 INFO L93 Difference]: Finished difference Result 380 states and 1224 transitions. [2021-11-12 22:29:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:55,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 [2021-11-12 22:29:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:55,378 INFO L225 Difference]: With dead ends: 380 [2021-11-12 22:29:55,378 INFO L226 Difference]: Without dead ends: 380 [2021-11-12 22:29:55,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:29:55,379 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 53 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 281.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.70ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 323.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:55,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 12 Invalid, 123 Unknown, 0 Unchecked, 0.70ms Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 323.10ms Time] [2021-11-12 22:29:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-12 22:29:55,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 264. [2021-11-12 22:29:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.159695817490494) internal successors, (831), 263 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 831 transitions. [2021-11-12 22:29:55,391 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 831 transitions. Word has length 22 [2021-11-12 22:29:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:55,391 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 831 transitions. [2021-11-12 22:29:55,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-11-12 22:29:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 831 transitions. [2021-11-12 22:29:55,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:29:55,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:55,393 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] [2021-11-12 22:29:55,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:55,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:55,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:55,805 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:55,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:55,805 INFO L85 PathProgramCache]: Analyzing trace with hash -800225259, now seen corresponding path program 1 times [2021-11-12 22:29:55,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:55,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656263748] [2021-11-12 22:29:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:55,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:55,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:55,807 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:55,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-12 22:29:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:55,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:29:55,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:56,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:56,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:56,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656263748] [2021-11-12 22:29:56,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656263748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:56,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [332210148] [2021-11-12 22:29:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:56,215 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:56,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:56,217 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:56,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-12 22:29:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:56,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:29:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:56,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:56,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [332210148] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:56,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893937106] [2021-11-12 22:29:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:56,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:56,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:56,630 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:56,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-12 22:29:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:56,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:29:56,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:56,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:29:56,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893937106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:56,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:29:56,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 5, 6, 6] total 20 [2021-11-12 22:29:56,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67080086] [2021-11-12 22:29:56,930 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:29:56,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:29:56,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:56,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:29:56,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:29:56,931 INFO L87 Difference]: Start difference. First operand 264 states and 831 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:57,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:57,955 INFO L93 Difference]: Finished difference Result 486 states and 1552 transitions. [2021-11-12 22:29:57,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:29:57,955 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 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 [2021-11-12 22:29:57,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:57,959 INFO L225 Difference]: With dead ends: 486 [2021-11-12 22:29:57,959 INFO L226 Difference]: Without dead ends: 486 [2021-11-12 22:29:57,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:29:57,960 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 183 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 576.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.91ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 663.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:57,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 36 Invalid, 335 Unknown, 0 Unchecked, 1.91ms Time], IncrementalHoareTripleChecker [25 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 663.15ms Time] [2021-11-12 22:29:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-12 22:29:57,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 224. [2021-11-12 22:29:57,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 3.1704035874439462) internal successors, (707), 223 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:57,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 707 transitions. [2021-11-12 22:29:57,969 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 707 transitions. Word has length 22 [2021-11-12 22:29:57,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:57,970 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 707 transitions. [2021-11-12 22:29:57,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:57,970 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 707 transitions. [2021-11-12 22:29:57,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-12 22:29:57,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:57,971 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] [2021-11-12 22:29:57,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:58,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-12 22:29:58,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:58,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:58,572 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:29:58,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:58,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1001993969, now seen corresponding path program 1 times [2021-11-12 22:29:58,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:58,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611028511] [2021-11-12 22:29:58,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:58,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:58,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:58,573 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:58,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125d53b5-356d-4cda-9de5-cae925b541d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-12 22:29:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:58,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-12 22:29:58,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:59,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:59,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:59,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:59,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:59,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:59,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:59,475 INFO L354 Elim1Store]: treesize reduction 923, result has 6.4 percent of original size [2021-11-12 22:29:59,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 68 treesize of output 88 [2021-11-12 22:30:06,126 INFO L354 Elim1Store]: treesize reduction 282, result has 0.4 percent of original size [2021-11-12 22:30:06,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 41 [2021-11-12 22:30:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:30:06,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:11,158 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-11-12 22:30:11,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 45533298534 treesize of output 26004619150