./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 e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/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_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE --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 ............................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/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_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE --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 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:09:18,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:09:18,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:09:18,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:09:18,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:09:18,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:09:18,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:09:18,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:09:18,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:09:18,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:09:18,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:09:18,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:09:18,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:09:18,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:09:18,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:09:18,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:09:18,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:09:18,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:09:18,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:09:18,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:09:18,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:09:18,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:09:18,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:09:18,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:09:18,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:09:18,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:09:18,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:09:18,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:09:18,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:09:18,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:09:18,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:09:18,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:09:18,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:09:18,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:09:18,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:09:18,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:09:18,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:09:18,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:09:18,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:09:19,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:09:19,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:09:19,002 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 11:09:19,053 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:09:19,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:09:19,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:09:19,055 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:09:19,055 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:09:19,056 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:09:19,056 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 11:09:19,056 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:09:19,056 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:09:19,057 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 11:09:19,058 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 11:09:19,058 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:09:19,059 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 11:09:19,059 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 11:09:19,059 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 11:09:19,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:09:19,061 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:09:19,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:09:19,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:09:19,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:09:19,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:09:19,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:09:19,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:09:19,063 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:09:19,063 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:09:19,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:09:19,064 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:09:19,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:09:19,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:09:19,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:09:19,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:09:19,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:09:19,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:09:19,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:09:19,068 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 11:09:19,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 11:09:19,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:09:19,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:09:19,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:09:19,069 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_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 [2021-10-24 11:09:19,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:09:19,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:09:19,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:09:19,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:09:19,390 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:09:19,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2021-10-24 11:09:19,477 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/data/ff4e883d1/76b7fdba6e70420f92b8165c3182f446/FLAG0c2236e71 [2021-10-24 11:09:20,012 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:09:20,013 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2021-10-24 11:09:20,035 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/data/ff4e883d1/76b7fdba6e70420f92b8165c3182f446/FLAG0c2236e71 [2021-10-24 11:09:20,362 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/data/ff4e883d1/76b7fdba6e70420f92b8165c3182f446 [2021-10-24 11:09:20,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:09:20,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:09:20,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:09:20,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:09:20,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:09:20,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:09:20" (1/1) ... [2021-10-24 11:09:20,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10475f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:20, skipping insertion in model container [2021-10-24 11:09:20,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:09:20" (1/1) ... [2021-10-24 11:09:20,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:09:20,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:09:20,696 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_82496d8d-d83a-43af-ad32-bb6c862ad8bb/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2021-10-24 11:09:20,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:09:20,733 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) [2021-10-24 11:09:20,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ebd41e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:20, skipping insertion in model container [2021-10-24 11:09:20,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:09:20,734 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-24 11:09:20,736 INFO L168 Benchmark]: Toolchain (without parser) took 357.78 ms. Allocated memory is still 96.5 MB. Free memory was 62.6 MB in the beginning and 71.5 MB in the end (delta: -8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:20,737 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 96.5 MB. Free memory is still 49.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:09:20,738 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.89 ms. Allocated memory is still 96.5 MB. Free memory was 62.4 MB in the beginning and 71.5 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:20,740 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 96.5 MB. Free memory is still 49.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 352.89 ms. Allocated memory is still 96.5 MB. Free memory was 62.4 MB in the beginning and 71.5 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * 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... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:09:23,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:09:23,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:09:23,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:09:23,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:09:23,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:09:23,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:09:23,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:09:23,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:09:23,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:09:23,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:09:23,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:09:23,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:09:23,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:09:23,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:09:23,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:09:23,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:09:23,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:09:23,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:09:23,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:09:23,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:09:23,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:09:23,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:09:23,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:09:23,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:09:23,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:09:23,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:09:23,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:09:23,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:09:23,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:09:23,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:09:23,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:09:23,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:09:23,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:09:23,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:09:23,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:09:23,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:09:23,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:09:23,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:09:23,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:09:23,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:09:23,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 11:09:23,313 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:09:23,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:09:23,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:09:23,315 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:09:23,315 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:09:23,316 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:09:23,316 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:09:23,316 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:09:23,316 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:09:23,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:09:23,319 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:09:23,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:09:23,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:09:23,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:09:23,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:09:23,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:09:23,320 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:09:23,320 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 11:09:23,320 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 11:09:23,321 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:09:23,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:09:23,321 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:09:23,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:09:23,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:09:23,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 11:09:23,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:09:23,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:09:23,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:09:23,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:09:23,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:09:23,323 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 11:09:23,323 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 11:09:23,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:09:23,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:09:23,324 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:09:23,324 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_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 [2021-10-24 11:09:23,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:09:23,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:09:23,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:09:23,765 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:09:23,766 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:09:23,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2021-10-24 11:09:23,859 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/data/5d553600d/88f2951c8ba04d788fa9b7356451e58f/FLAG6fc8476ab [2021-10-24 11:09:24,538 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:09:24,539 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2021-10-24 11:09:24,549 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/data/5d553600d/88f2951c8ba04d788fa9b7356451e58f/FLAG6fc8476ab [2021-10-24 11:09:24,879 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/data/5d553600d/88f2951c8ba04d788fa9b7356451e58f [2021-10-24 11:09:24,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:09:24,883 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:09:24,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:09:24,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:09:24,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:09:24,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:09:24" (1/1) ... [2021-10-24 11:09:24,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6665cfeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:24, skipping insertion in model container [2021-10-24 11:09:24,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:09:24" (1/1) ... [2021-10-24 11:09:24,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:09:24,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:09:25,094 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_82496d8d-d83a-43af-ad32-bb6c862ad8bb/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2021-10-24 11:09:25,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:09:25,119 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-24 11:09:25,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:09:25,172 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_82496d8d-d83a-43af-ad32-bb6c862ad8bb/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2021-10-24 11:09:25,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:09:25,209 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:09:25,248 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_82496d8d-d83a-43af-ad32-bb6c862ad8bb/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2021-10-24 11:09:25,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:09:25,272 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:09:25,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:25 WrapperNode [2021-10-24 11:09:25,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:09:25,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:09:25,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:09:25,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:09:25,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:25" (1/1) ... [2021-10-24 11:09:25,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:25" (1/1) ... [2021-10-24 11:09:25,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:09:25,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:09:25,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:09:25,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:09:25,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:25" (1/1) ... [2021-10-24 11:09:25,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:25" (1/1) ... [2021-10-24 11:09:25,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:25" (1/1) ... [2021-10-24 11:09:25,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:25" (1/1) ... [2021-10-24 11:09:25,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:25" (1/1) ... [2021-10-24 11:09:25,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:25" (1/1) ... [2021-10-24 11:09:25,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:25" (1/1) ... [2021-10-24 11:09:25,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:09:25,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:09:25,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:09:25,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:09:25,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:25" (1/1) ... [2021-10-24 11:09:25,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:09:25,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:09:25,413 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:09:25,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:09:25,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 11:09:25,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:09:25,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 11:09:25,481 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-24 11:09:25,481 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-24 11:09:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-24 11:09:25,486 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-24 11:09:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-24 11:09:25,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-24 11:09:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-24 11:09:25,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-24 11:09:25,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 11:09:25,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:09:25,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:09:25,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 11:09:25,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-24 11:09:25,491 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-24 11:09:26,976 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:09:26,976 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2021-10-24 11:09:26,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:09:26 BoogieIcfgContainer [2021-10-24 11:09:26,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:09:26,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:09:26,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:09:26,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:09:26,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:09:24" (1/3) ... [2021-10-24 11:09:26,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb8f468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:09:26, skipping insertion in model container [2021-10-24 11:09:26,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:25" (2/3) ... [2021-10-24 11:09:26,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb8f468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:09:26, skipping insertion in model container [2021-10-24 11:09:26,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:09:26" (3/3) ... [2021-10-24 11:09:26,993 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2021-10-24 11:09:26,999 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-24 11:09:27,000 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:09:27,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 11:09:27,000 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-24 11:09:27,056 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,057 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,057 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,058 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,058 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,059 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,059 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,059 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,059 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,060 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,060 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,060 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,060 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,061 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,061 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,061 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,062 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,062 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,063 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,064 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,064 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,064 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,065 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,065 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,065 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,066 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,066 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,066 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,066 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,067 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,067 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,067 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,068 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,068 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,068 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,069 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,069 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,069 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,069 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,070 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,070 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,071 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,071 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,071 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,072 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,072 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,072 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,072 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,073 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,073 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,074 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,074 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,074 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,074 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,075 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,076 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,076 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,076 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,076 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,077 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,077 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,078 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,078 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,078 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,078 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,079 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,079 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,079 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,080 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,080 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,081 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,081 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,081 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,081 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,082 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,082 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,083 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,084 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,087 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,087 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,088 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,089 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,090 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,091 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,091 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,091 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,091 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,098 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,098 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,099 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,099 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,099 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,100 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,100 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,100 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,100 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,101 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,102 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,102 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,102 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,103 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,103 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,103 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,103 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,104 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,104 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,104 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,104 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,105 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,105 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,105 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,106 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,106 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,106 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,106 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,107 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,107 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,107 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,107 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,108 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,111 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,112 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,112 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,112 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,113 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,113 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,113 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,113 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,114 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,114 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,114 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,114 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,115 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,118 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,119 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,119 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,119 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,120 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,120 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,120 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,121 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,121 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,121 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,121 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,122 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,122 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,126 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,126 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,126 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,127 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,127 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,129 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,129 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,129 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,130 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,130 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,130 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,131 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,131 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:09:27,138 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-24 11:09:27,223 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:09:27,229 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 [2021-10-24 11:09:27,230 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-24 11:09:27,254 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-24 11:09:27,265 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 136 transitions, 296 flow [2021-10-24 11:09:27,268 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 136 transitions, 296 flow [2021-10-24 11:09:27,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 136 transitions, 296 flow [2021-10-24 11:09:27,359 INFO L129 PetriNetUnfolder]: 12/133 cut-off events. [2021-10-24 11:09:27,360 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-24 11:09:27,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 133 events. 12/133 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 98. Up to 2 conditions per place. [2021-10-24 11:09:27,370 INFO L116 LiptonReduction]: Number of co-enabled transitions 1320 [2021-10-24 11:09:48,856 INFO L131 LiptonReduction]: Checked pairs total: 1652 [2021-10-24 11:09:48,856 INFO L133 LiptonReduction]: Total number of compositions: 129 [2021-10-24 11:09:48,864 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 28 transitions, 80 flow [2021-10-24 11:09:48,882 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) [2021-10-24 11:09:48,885 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) [2021-10-24 11:09:48,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-24 11:09:48,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:48,894 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:48,894 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:09:48,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:48,900 INFO L82 PathProgramCache]: Analyzing trace with hash 92896510, now seen corresponding path program 1 times [2021-10-24 11:09:48,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:09:48,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155984634] [2021-10-24 11:09:48,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:48,913 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:09:48,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:09:48,937 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:09:48,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 11:09:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:49,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 11:09:49,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:49,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:49,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:09:49,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155984634] [2021-10-24 11:09:49,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155984634] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:09:49,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:09:49,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-24 11:09:49,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267529950] [2021-10-24 11:09:49,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:09:49,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:09:49,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:09:49,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:09:49,598 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) [2021-10-24 11:09:49,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:49,681 INFO L93 Difference]: Finished difference Result 204 states and 632 transitions. [2021-10-24 11:09:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:09:49,682 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 [2021-10-24 11:09:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:49,704 INFO L225 Difference]: With dead ends: 204 [2021-10-24 11:09:49,704 INFO L226 Difference]: Without dead ends: 197 [2021-10-24 11:09:49,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:09:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-24 11:09:49,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-10-24 11:09:49,768 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) [2021-10-24 11:09:49,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 614 transitions. [2021-10-24 11:09:49,775 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 614 transitions. Word has length 20 [2021-10-24 11:09:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:49,776 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 614 transitions. [2021-10-24 11:09:49,777 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) [2021-10-24 11:09:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 614 transitions. [2021-10-24 11:09:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 11:09:49,780 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:49,782 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:49,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-24 11:09:49,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:09:49,983 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:09:49,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:49,984 INFO L82 PathProgramCache]: Analyzing trace with hash 2079561210, now seen corresponding path program 1 times [2021-10-24 11:09:49,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:09:49,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528530295] [2021-10-24 11:09:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:49,985 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:09:49,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:09:49,986 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:09:50,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 11:09:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:50,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 11:09:50,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:50,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:50,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:09:50,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528530295] [2021-10-24 11:09:50,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528530295] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:09:50,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 11:09:50,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-10-24 11:09:50,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539150981] [2021-10-24 11:09:50,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 11:09:50,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:09:50,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 11:09:50,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:09:50,580 INFO L87 Difference]: Start difference. First operand 197 states and 614 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) [2021-10-24 11:09:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:50,762 INFO L93 Difference]: Finished difference Result 379 states and 1141 transitions. [2021-10-24 11:09:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:09:50,766 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 [2021-10-24 11:09:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:50,771 INFO L225 Difference]: With dead ends: 379 [2021-10-24 11:09:50,771 INFO L226 Difference]: Without dead ends: 375 [2021-10-24 11:09:50,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-24 11:09:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-10-24 11:09:50,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 287. [2021-10-24 11:09:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.1783216783216783) internal successors, (909), 286 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 909 transitions. [2021-10-24 11:09:50,810 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 909 transitions. Word has length 21 [2021-10-24 11:09:50,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:50,811 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 909 transitions. [2021-10-24 11:09:50,811 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) [2021-10-24 11:09:50,811 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 909 transitions. [2021-10-24 11:09:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 11:09:50,821 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:50,821 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:50,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 11:09:51,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:09:51,033 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:09:51,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:51,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1971778909, now seen corresponding path program 1 times [2021-10-24 11:09:51,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:09:51,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528832669] [2021-10-24 11:09:51,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:51,036 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:09:51,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:09:51,037 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:09:51,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 11:09:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:51,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-24 11:09:51,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:51,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:51,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:09:51,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528832669] [2021-10-24 11:09:51,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528832669] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:09:51,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:09:51,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 10 [2021-10-24 11:09:51,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425419253] [2021-10-24 11:09:51,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:09:51,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:09:51,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:09:51,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:09:51,650 INFO L87 Difference]: Start difference. First operand 287 states and 909 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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) [2021-10-24 11:09:52,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:52,393 INFO L93 Difference]: Finished difference Result 447 states and 1290 transitions. [2021-10-24 11:09:52,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-24 11:09:52,396 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 [2021-10-24 11:09:52,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:52,400 INFO L225 Difference]: With dead ends: 447 [2021-10-24 11:09:52,400 INFO L226 Difference]: Without dead ends: 407 [2021-10-24 11:09:52,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-10-24 11:09:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-10-24 11:09:52,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 299. [2021-10-24 11:09:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0805369127516777) internal successors, (918), 298 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:52,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 918 transitions. [2021-10-24 11:09:52,424 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 918 transitions. Word has length 21 [2021-10-24 11:09:52,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:52,424 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 918 transitions. [2021-10-24 11:09:52,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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) [2021-10-24 11:09:52,425 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 918 transitions. [2021-10-24 11:09:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 11:09:52,426 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:52,426 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:52,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 11:09:52,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:09:52,641 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:09:52,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:52,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2113150932, now seen corresponding path program 1 times [2021-10-24 11:09:52,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:09:52,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285461508] [2021-10-24 11:09:52,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:52,644 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:09:52,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:09:52,645 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:09:52,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 11:09:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:52,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:09:52,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:53,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:53,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:09:53,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285461508] [2021-10-24 11:09:53,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285461508] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:09:53,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:09:53,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-24 11:09:53,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708850174] [2021-10-24 11:09:53,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-24 11:09:53,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:09:53,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-24 11:09:53,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-24 11:09:53,225 INFO L87 Difference]: Start difference. First operand 299 states and 918 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:53,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:53,726 INFO L93 Difference]: Finished difference Result 387 states and 1139 transitions. [2021-10-24 11:09:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 11:09:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-24 11:09:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:53,732 INFO L225 Difference]: With dead ends: 387 [2021-10-24 11:09:53,733 INFO L226 Difference]: Without dead ends: 357 [2021-10-24 11:09:53,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-10-24 11:09:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-10-24 11:09:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 307. [2021-10-24 11:09:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.052287581699346) internal successors, (934), 306 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 934 transitions. [2021-10-24 11:09:53,751 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 934 transitions. Word has length 21 [2021-10-24 11:09:53,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:53,751 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 934 transitions. [2021-10-24 11:09:53,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 934 transitions. [2021-10-24 11:09:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 11:09:53,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:53,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:53,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-24 11:09:53,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:09:53,975 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:09:53,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:53,976 INFO L82 PathProgramCache]: Analyzing trace with hash -728276090, now seen corresponding path program 2 times [2021-10-24 11:09:53,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:09:53,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306650328] [2021-10-24 11:09:53,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:09:53,976 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:09:53,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:09:53,977 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:09:53,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 11:09:54,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:09:54,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:09:54,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-24 11:09:54,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:54,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:54,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:09:54,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306650328] [2021-10-24 11:09:54,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306650328] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:09:54,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:09:54,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 10 [2021-10-24 11:09:54,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802035453] [2021-10-24 11:09:54,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:09:54,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:09:54,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:09:54,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:09:54,657 INFO L87 Difference]: Start difference. First operand 307 states and 934 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:55,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:55,435 INFO L93 Difference]: Finished difference Result 619 states and 1705 transitions. [2021-10-24 11:09:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-24 11:09:55,436 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-10-24 11:09:55,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:55,441 INFO L225 Difference]: With dead ends: 619 [2021-10-24 11:09:55,441 INFO L226 Difference]: Without dead ends: 587 [2021-10-24 11:09:55,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 430.1ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-10-24 11:09:55,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-10-24 11:09:55,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 323. [2021-10-24 11:09:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.170807453416149) internal successors, (1021), 322 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 1021 transitions. [2021-10-24 11:09:55,463 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 1021 transitions. Word has length 21 [2021-10-24 11:09:55,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:55,464 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 1021 transitions. [2021-10-24 11:09:55,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:55,464 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 1021 transitions. [2021-10-24 11:09:55,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 11:09:55,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:55,466 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:55,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 11:09:55,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:09:55,682 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:09:55,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:55,682 INFO L82 PathProgramCache]: Analyzing trace with hash 491173578, now seen corresponding path program 3 times [2021-10-24 11:09:55,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:09:55,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108066498] [2021-10-24 11:09:55,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:09:55,683 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:09:55,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:09:55,684 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:09:55,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 11:09:55,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:09:55,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:09:55,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:09:55,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:56,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:56,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:09:56,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108066498] [2021-10-24 11:09:56,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108066498] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:09:56,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 11:09:56,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-10-24 11:09:56,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867476507] [2021-10-24 11:09:56,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 11:09:56,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:09:56,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 11:09:56,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-24 11:09:56,372 INFO L87 Difference]: Start difference. First operand 323 states and 1021 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) [2021-10-24 11:09:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:56,728 INFO L93 Difference]: Finished difference Result 471 states and 1427 transitions. [2021-10-24 11:09:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 11:09:56,730 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 [2021-10-24 11:09:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:56,734 INFO L225 Difference]: With dead ends: 471 [2021-10-24 11:09:56,734 INFO L226 Difference]: Without dead ends: 455 [2021-10-24 11:09:56,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-24 11:09:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-10-24 11:09:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 315. [2021-10-24 11:09:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0636942675159236) internal successors, (962), 314 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 962 transitions. [2021-10-24 11:09:56,750 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 962 transitions. Word has length 21 [2021-10-24 11:09:56,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:56,751 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 962 transitions. [2021-10-24 11:09:56,751 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) [2021-10-24 11:09:56,751 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 962 transitions. [2021-10-24 11:09:56,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 11:09:56,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:56,753 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:56,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-24 11:09:56,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:09:56,966 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:09:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:56,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1568001428, now seen corresponding path program 4 times [2021-10-24 11:09:56,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:09:56,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45414040] [2021-10-24 11:09:56,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 11:09:56,968 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:09:56,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:09:56,969 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:09:56,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-24 11:09:57,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 11:09:57,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:09:57,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:09:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:57,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:57,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:09:57,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45414040] [2021-10-24 11:09:57,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45414040] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:09:57,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:09:57,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-24 11:09:57,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316841886] [2021-10-24 11:09:57,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-24 11:09:57,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:09:57,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-24 11:09:57,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-24 11:09:57,664 INFO L87 Difference]: Start difference. First operand 315 states and 962 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:58,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:58,198 INFO L93 Difference]: Finished difference Result 477 states and 1447 transitions. [2021-10-24 11:09:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-24 11:09:58,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-24 11:09:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:58,204 INFO L225 Difference]: With dead ends: 477 [2021-10-24 11:09:58,204 INFO L226 Difference]: Without dead ends: 455 [2021-10-24 11:09:58,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-10-24 11:09:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-10-24 11:09:58,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 327. [2021-10-24 11:09:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.1134969325153374) internal successors, (1015), 326 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 1015 transitions. [2021-10-24 11:09:58,222 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 1015 transitions. Word has length 21 [2021-10-24 11:09:58,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:58,223 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 1015 transitions. [2021-10-24 11:09:58,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:58,224 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 1015 transitions. [2021-10-24 11:09:58,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 11:09:58,225 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:58,225 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:58,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-24 11:09:58,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:09:58,438 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:09:58,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:58,439 INFO L82 PathProgramCache]: Analyzing trace with hash 780865942, now seen corresponding path program 5 times [2021-10-24 11:09:58,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:09:58,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029442418] [2021-10-24 11:09:58,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 11:09:58,440 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:09:58,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:09:58,441 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:09:58,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-24 11:09:58,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:09:58,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:09:58,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:09:58,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:58,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:59,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:09:59,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029442418] [2021-10-24 11:09:59,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029442418] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:09:59,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [874107243] [2021-10-24 11:09:59,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 11:09:59,061 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:09:59,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:09:59,063 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:09:59,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-24 11:09:59,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:09:59,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:09:59,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-24 11:09:59,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:59,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:00,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [874107243] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:00,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182898227] [2021-10-24 11:10:00,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 11:10:00,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:10:00,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:10:00,111 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:10:00,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-24 11:10:00,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:10:00,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:00,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 11:10:00,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:00,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:00,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182898227] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:00,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 11:10:00,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 6, 6] total 20 [2021-10-24 11:10:00,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005129901] [2021-10-24 11:10:00,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-24 11:10:00,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:00,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-24 11:10:00,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-10-24 11:10:00,811 INFO L87 Difference]: Start difference. First operand 327 states and 1015 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:01,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:01,446 INFO L93 Difference]: Finished difference Result 561 states and 1699 transitions. [2021-10-24 11:10:01,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 11:10:01,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 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 [2021-10-24 11:10:01,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:01,454 INFO L225 Difference]: With dead ends: 561 [2021-10-24 11:10:01,454 INFO L226 Difference]: Without dead ends: 478 [2021-10-24 11:10:01,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 402.7ms TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-10-24 11:10:01,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-10-24 11:10:01,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 262. [2021-10-24 11:10:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.2298850574712645) internal successors, (843), 261 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:01,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 843 transitions. [2021-10-24 11:10:01,470 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 843 transitions. Word has length 21 [2021-10-24 11:10:01,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:01,471 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 843 transitions. [2021-10-24 11:10:01,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:01,472 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 843 transitions. [2021-10-24 11:10:01,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:01,474 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:01,474 INFO L512 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] [2021-10-24 11:10:01,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:01,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-24 11:10:01,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:02,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:10:02,078 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:02,078 INFO L82 PathProgramCache]: Analyzing trace with hash 222500957, now seen corresponding path program 1 times [2021-10-24 11:10:02,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:02,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662577670] [2021-10-24 11:10:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:10:02,079 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:02,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:02,080 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:02,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-24 11:10:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:02,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-24 11:10:02,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:02,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:03,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:03,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662577670] [2021-10-24 11:10:03,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662577670] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:03,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1750124598] [2021-10-24 11:10:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:10:03,239 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:03,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:10:03,255 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:10:03,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-24 11:10:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:03,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:10:03,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:03,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:04,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1750124598] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:04,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623178120] [2021-10-24 11:10:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:10:04,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:10:04,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:10:04,179 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:10:04,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-24 11:10:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:04,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-24 11:10:04,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:04,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:05,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623178120] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:10:05,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-24 11:10:05,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 8, 7, 7, 8] total 28 [2021-10-24 11:10:05,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075869776] [2021-10-24 11:10:05,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:10:05,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:05,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:10:05,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2021-10-24 11:10:05,106 INFO L87 Difference]: Start difference. First operand 262 states and 843 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) [2021-10-24 11:10:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:05,660 INFO L93 Difference]: Finished difference Result 360 states and 1123 transitions. [2021-10-24 11:10:05,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:10:05,661 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 [2021-10-24 11:10:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:05,665 INFO L225 Difference]: With dead ends: 360 [2021-10-24 11:10:05,665 INFO L226 Difference]: Without dead ends: 360 [2021-10-24 11:10:05,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 783.8ms TimeCoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2021-10-24 11:10:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-10-24 11:10:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 276. [2021-10-24 11:10:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.3018181818181818) internal successors, (908), 275 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 908 transitions. [2021-10-24 11:10:05,682 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 908 transitions. Word has length 22 [2021-10-24 11:10:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:05,682 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 908 transitions. [2021-10-24 11:10:05,682 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) [2021-10-24 11:10:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 908 transitions. [2021-10-24 11:10:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:05,684 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:05,684 INFO L512 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] [2021-10-24 11:10:05,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:05,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:06,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:06,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:10:06,297 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:06,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:06,297 INFO L82 PathProgramCache]: Analyzing trace with hash 663686447, now seen corresponding path program 2 times [2021-10-24 11:10:06,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:06,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710113211] [2021-10-24 11:10:06,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:10:06,298 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:06,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:06,299 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:06,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-24 11:10:06,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:10:06,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:06,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 11:10:06,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:07,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:07,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:07,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710113211] [2021-10-24 11:10:07,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710113211] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:07,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1565250804] [2021-10-24 11:10:07,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:10:07,441 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:07,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:10:07,442 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:10:07,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-24 11:10:08,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:10:08,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:08,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 11:10:08,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:08,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:08,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1565250804] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:10:08,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 11:10:08,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 19 [2021-10-24 11:10:08,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303380884] [2021-10-24 11:10:08,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:10:08,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:08,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:10:08,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-10-24 11:10:08,480 INFO L87 Difference]: Start difference. First operand 276 states and 908 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) [2021-10-24 11:10:08,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:08,801 INFO L93 Difference]: Finished difference Result 432 states and 1370 transitions. [2021-10-24 11:10:08,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:10:08,802 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 [2021-10-24 11:10:08,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:08,806 INFO L225 Difference]: With dead ends: 432 [2021-10-24 11:10:08,806 INFO L226 Difference]: Without dead ends: 432 [2021-10-24 11:10:08,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 484.0ms TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-10-24 11:10:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-10-24 11:10:08,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 298. [2021-10-24 11:10:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.393939393939394) internal successors, (1008), 297 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 1008 transitions. [2021-10-24 11:10:08,821 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 1008 transitions. Word has length 22 [2021-10-24 11:10:08,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:08,821 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 1008 transitions. [2021-10-24 11:10:08,822 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) [2021-10-24 11:10:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 1008 transitions. [2021-10-24 11:10:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:08,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:08,823 INFO L512 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] [2021-10-24 11:10:08,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:09,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:09,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:09,239 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1508884119, now seen corresponding path program 3 times [2021-10-24 11:10:09,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:09,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321105753] [2021-10-24 11:10:09,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:10:09,241 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:09,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:09,242 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:09,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-24 11:10:09,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:10:09,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:09,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 11:10:09,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:10,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:10,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:10,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321105753] [2021-10-24 11:10:10,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321105753] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:10,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1506741452] [2021-10-24 11:10:10,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:10:10,344 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:10,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:10:10,351 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:10:10,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-24 11:10:11,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:10:11,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:11,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 11:10:11,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:11,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:11,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1506741452] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:10:11,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 11:10:11,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 18 [2021-10-24 11:10:11,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022129974] [2021-10-24 11:10:11,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:10:11,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:11,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:10:11,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-10-24 11:10:11,369 INFO L87 Difference]: Start difference. First operand 298 states and 1008 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) [2021-10-24 11:10:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:11,566 INFO L93 Difference]: Finished difference Result 366 states and 1206 transitions. [2021-10-24 11:10:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:10:11,576 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 [2021-10-24 11:10:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:11,579 INFO L225 Difference]: With dead ends: 366 [2021-10-24 11:10:11,579 INFO L226 Difference]: Without dead ends: 366 [2021-10-24 11:10:11,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 348.6ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-10-24 11:10:11,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-10-24 11:10:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 304. [2021-10-24 11:10:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.372937293729373) internal successors, (1022), 303 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1022 transitions. [2021-10-24 11:10:11,593 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1022 transitions. Word has length 22 [2021-10-24 11:10:11,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:11,593 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 1022 transitions. [2021-10-24 11:10:11,594 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) [2021-10-24 11:10:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1022 transitions. [2021-10-24 11:10:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:11,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:11,595 INFO L512 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] [2021-10-24 11:10:11,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:11,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:12,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:12,008 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:12,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:12,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1024743413, now seen corresponding path program 4 times [2021-10-24 11:10:12,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:12,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481771259] [2021-10-24 11:10:12,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 11:10:12,010 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:12,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:12,011 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:12,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-24 11:10:12,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 11:10:12,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:12,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-24 11:10:12,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:12,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:13,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:13,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481771259] [2021-10-24 11:10:13,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481771259] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:13,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [532609006] [2021-10-24 11:10:13,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 11:10:13,180 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:13,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:10:13,181 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:10:13,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-24 11:10:13,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 11:10:13,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:13,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:10:13,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:14,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:14,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [532609006] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:14,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114749780] [2021-10-24 11:10:14,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 11:10:14,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:10:14,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:10:14,256 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:10:14,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-24 11:10:14,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 11:10:14,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:14,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-24 11:10:14,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:15,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:15,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114749780] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:10:15,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-24 11:10:15,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 8, 7, 7, 8] total 29 [2021-10-24 11:10:15,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940938174] [2021-10-24 11:10:15,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:10:15,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:15,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:10:15,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-10-24 11:10:15,286 INFO L87 Difference]: Start difference. First operand 304 states and 1022 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) [2021-10-24 11:10:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:15,631 INFO L93 Difference]: Finished difference Result 416 states and 1349 transitions. [2021-10-24 11:10:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:10:15,632 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 [2021-10-24 11:10:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:15,635 INFO L225 Difference]: With dead ends: 416 [2021-10-24 11:10:15,635 INFO L226 Difference]: Without dead ends: 416 [2021-10-24 11:10:15,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 648.6ms TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2021-10-24 11:10:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-10-24 11:10:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 326. [2021-10-24 11:10:15,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.353846153846154) internal successors, (1090), 325 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1090 transitions. [2021-10-24 11:10:15,650 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1090 transitions. Word has length 22 [2021-10-24 11:10:15,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:15,651 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 1090 transitions. [2021-10-24 11:10:15,651 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) [2021-10-24 11:10:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1090 transitions. [2021-10-24 11:10:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:15,652 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:15,653 INFO L512 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] [2021-10-24 11:10:15,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-24 11:10:15,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:16,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:16,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:10:16,284 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:16,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:16,285 INFO L82 PathProgramCache]: Analyzing trace with hash 704303921, now seen corresponding path program 5 times [2021-10-24 11:10:16,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:16,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2629462] [2021-10-24 11:10:16,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 11:10:16,285 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:16,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:16,287 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:16,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-24 11:10:16,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:10:16,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:16,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 11:10:16,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:17,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:17,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:17,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2629462] [2021-10-24 11:10:17,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2629462] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:17,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1488187341] [2021-10-24 11:10:17,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 11:10:17,444 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:17,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:10:17,445 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:10:17,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-24 11:10:18,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:10:18,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:18,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:10:18,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:18,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:18,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1488187341] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:18,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721549499] [2021-10-24 11:10:18,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 11:10:18,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:10:18,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:10:18,687 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:10:18,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-24 11:10:19,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:10:19,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:19,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-24 11:10:19,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:19,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:19,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721549499] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:10:19,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-24 11:10:19,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 8] total 28 [2021-10-24 11:10:19,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736663937] [2021-10-24 11:10:19,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:10:19,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:19,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:10:19,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-10-24 11:10:19,758 INFO L87 Difference]: Start difference. First operand 326 states and 1090 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) [2021-10-24 11:10:20,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:20,196 INFO L93 Difference]: Finished difference Result 446 states and 1431 transitions. [2021-10-24 11:10:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:10:20,196 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 [2021-10-24 11:10:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:20,200 INFO L225 Difference]: With dead ends: 446 [2021-10-24 11:10:20,200 INFO L226 Difference]: Without dead ends: 446 [2021-10-24 11:10:20,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 689.6ms TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2021-10-24 11:10:20,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-10-24 11:10:20,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 332. [2021-10-24 11:10:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.389728096676737) internal successors, (1122), 331 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1122 transitions. [2021-10-24 11:10:20,215 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1122 transitions. Word has length 22 [2021-10-24 11:10:20,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:20,215 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 1122 transitions. [2021-10-24 11:10:20,216 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) [2021-10-24 11:10:20,216 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1122 transitions. [2021-10-24 11:10:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:20,217 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:20,218 INFO L512 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] [2021-10-24 11:10:20,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:20,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-10-24 11:10:20,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-10-24 11:10:20,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:10:20,840 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:20,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:20,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1145489411, now seen corresponding path program 6 times [2021-10-24 11:10:20,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:20,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947199404] [2021-10-24 11:10:20,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 11:10:20,840 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:20,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:20,841 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:20,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-24 11:10:21,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-24 11:10:21,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:21,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 11:10:21,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:21,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:22,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:22,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947199404] [2021-10-24 11:10:22,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947199404] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:22,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1477907271] [2021-10-24 11:10:22,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 11:10:22,104 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:22,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:10:22,111 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:10:22,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-10-24 11:10:23,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-24 11:10:23,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:23,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 11:10:23,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:23,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:23,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1477907271] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:10:23,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 11:10:23,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2021-10-24 11:10:23,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415184756] [2021-10-24 11:10:23,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:10:23,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:23,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:10:23,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-10-24 11:10:23,506 INFO L87 Difference]: Start difference. First operand 332 states and 1122 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) [2021-10-24 11:10:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:23,866 INFO L93 Difference]: Finished difference Result 450 states and 1455 transitions. [2021-10-24 11:10:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:10:23,867 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 [2021-10-24 11:10:23,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:23,870 INFO L225 Difference]: With dead ends: 450 [2021-10-24 11:10:23,871 INFO L226 Difference]: Without dead ends: 450 [2021-10-24 11:10:23,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 490.4ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-10-24 11:10:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-10-24 11:10:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 328. [2021-10-24 11:10:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.3211009174311927) internal successors, (1086), 327 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1086 transitions. [2021-10-24 11:10:23,885 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1086 transitions. Word has length 22 [2021-10-24 11:10:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:23,885 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 1086 transitions. [2021-10-24 11:10:23,885 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) [2021-10-24 11:10:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1086 transitions. [2021-10-24 11:10:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:23,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:23,887 INFO L512 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] [2021-10-24 11:10:23,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:24,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-10-24 11:10:24,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:10:24,292 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:24,292 INFO L82 PathProgramCache]: Analyzing trace with hash -104777222, now seen corresponding path program 1 times [2021-10-24 11:10:24,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:24,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145803780] [2021-10-24 11:10:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:10:24,293 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:24,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:24,294 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:24,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-24 11:10:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:24,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 11:10:24,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:25,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:25,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:25,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145803780] [2021-10-24 11:10:25,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145803780] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:25,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1079916996] [2021-10-24 11:10:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:10:25,230 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:25,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:10:25,231 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:10:25,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-24 11:10:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:26,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 11:10:26,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:26,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:26,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1079916996] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:26,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671277413] [2021-10-24 11:10:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:10:26,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:10:26,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:10:26,333 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:10:26,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-24 11:10:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:27,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 11:10:27,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:27,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:27,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671277413] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:10:27,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-24 11:10:27,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5, 5, 5] total 19 [2021-10-24 11:10:27,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482667360] [2021-10-24 11:10:27,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:10:27,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:27,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:10:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-10-24 11:10:27,498 INFO L87 Difference]: Start difference. First operand 328 states and 1086 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:27,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:27,886 INFO L93 Difference]: Finished difference Result 572 states and 1751 transitions. [2021-10-24 11:10:27,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 11:10:27,887 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-10-24 11:10:27,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:27,891 INFO L225 Difference]: With dead ends: 572 [2021-10-24 11:10:27,892 INFO L226 Difference]: Without dead ends: 572 [2021-10-24 11:10:27,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-10-24 11:10:27,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-10-24 11:10:27,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 340. [2021-10-24 11:10:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.3805309734513274) internal successors, (1146), 339 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1146 transitions. [2021-10-24 11:10:27,935 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1146 transitions. Word has length 22 [2021-10-24 11:10:27,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:27,936 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1146 transitions. [2021-10-24 11:10:27,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:27,936 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1146 transitions. [2021-10-24 11:10:27,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:27,938 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:27,939 INFO L512 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] [2021-10-24 11:10:27,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-24 11:10:28,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:28,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:28,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:28,553 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:28,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:28,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2069005467, now seen corresponding path program 7 times [2021-10-24 11:10:28,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:28,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992192976] [2021-10-24 11:10:28,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 11:10:28,554 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:28,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:28,555 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:28,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-24 11:10:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:29,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 11:10:29,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:29,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:29,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:29,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992192976] [2021-10-24 11:10:29,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992192976] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:29,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1188842580] [2021-10-24 11:10:29,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 11:10:29,895 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:29,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:10:29,899 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:10:29,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-10-24 11:10:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:30,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:10:30,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:31,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:31,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1188842580] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:31,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727148602] [2021-10-24 11:10:31,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 11:10:31,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:10:31,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:10:31,314 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:10:31,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-24 11:10:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:32,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-24 11:10:32,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:32,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:32,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727148602] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:10:32,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-24 11:10:32,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 27 [2021-10-24 11:10:32,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154662330] [2021-10-24 11:10:32,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:10:32,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:32,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:10:32,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2021-10-24 11:10:32,645 INFO L87 Difference]: Start difference. First operand 340 states and 1146 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) [2021-10-24 11:10:33,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:33,150 INFO L93 Difference]: Finished difference Result 564 states and 1855 transitions. [2021-10-24 11:10:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:10:33,151 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 [2021-10-24 11:10:33,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:33,155 INFO L225 Difference]: With dead ends: 564 [2021-10-24 11:10:33,155 INFO L226 Difference]: Without dead ends: 564 [2021-10-24 11:10:33,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 709.4ms TimeCoverageRelationStatistics Valid=244, Invalid=686, Unknown=0, NotChecked=0, Total=930 [2021-10-24 11:10:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-10-24 11:10:33,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 340. [2021-10-24 11:10:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.3805309734513274) internal successors, (1146), 339 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1146 transitions. [2021-10-24 11:10:33,170 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1146 transitions. Word has length 22 [2021-10-24 11:10:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:33,171 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1146 transitions. [2021-10-24 11:10:33,171 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) [2021-10-24 11:10:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1146 transitions. [2021-10-24 11:10:33,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:33,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:33,173 INFO L512 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] [2021-10-24 11:10:33,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:33,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-24 11:10:33,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-10-24 11:10:33,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:33,787 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:33,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:33,788 INFO L82 PathProgramCache]: Analyzing trace with hash -695241353, now seen corresponding path program 8 times [2021-10-24 11:10:33,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:33,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031299860] [2021-10-24 11:10:33,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:10:33,788 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:33,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:33,790 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:33,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-24 11:10:34,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:10:34,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:34,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-24 11:10:34,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:34,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:35,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:35,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:35,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031299860] [2021-10-24 11:10:35,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031299860] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:35,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1248020760] [2021-10-24 11:10:35,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:10:35,498 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:35,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:10:35,499 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:10:35,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-10-24 11:10:36,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:10:36,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:36,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 11:10:36,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:36,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:37,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1248020760] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:10:37,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 11:10:37,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 8, 6] total 25 [2021-10-24 11:10:37,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992795253] [2021-10-24 11:10:37,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:10:37,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:37,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:10:37,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-10-24 11:10:37,158 INFO L87 Difference]: Start difference. First operand 340 states and 1146 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) [2021-10-24 11:10:37,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:37,404 INFO L93 Difference]: Finished difference Result 442 states and 1490 transitions. [2021-10-24 11:10:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:10:37,412 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 [2021-10-24 11:10:37,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:37,416 INFO L225 Difference]: With dead ends: 442 [2021-10-24 11:10:37,416 INFO L226 Difference]: Without dead ends: 442 [2021-10-24 11:10:37,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 708.7ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-10-24 11:10:37,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-10-24 11:10:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 344. [2021-10-24 11:10:37,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.4081632653061225) internal successors, (1169), 343 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1169 transitions. [2021-10-24 11:10:37,429 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1169 transitions. Word has length 22 [2021-10-24 11:10:37,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:37,429 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1169 transitions. [2021-10-24 11:10:37,430 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) [2021-10-24 11:10:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1169 transitions. [2021-10-24 11:10:37,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:37,431 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:37,431 INFO L512 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] [2021-10-24 11:10:37,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-10-24 11:10:37,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-10-24 11:10:37,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:37,846 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:37,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:37,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1502006858, now seen corresponding path program 2 times [2021-10-24 11:10:37,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:37,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484470275] [2021-10-24 11:10:37,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:10:37,847 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:37,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:37,847 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:37,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-24 11:10:38,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:10:38,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:38,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 11:10:38,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:38,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:39,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:39,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484470275] [2021-10-24 11:10:39,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484470275] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:39,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [854097909] [2021-10-24 11:10:39,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:10:39,034 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:39,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:10:39,035 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:10:39,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-10-24 11:10:40,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:10:40,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:40,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 11:10:40,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:40,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:40,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [854097909] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:10:40,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 11:10:40,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 4] total 12 [2021-10-24 11:10:40,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681597897] [2021-10-24 11:10:40,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 11:10:40,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:40,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 11:10:40,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-10-24 11:10:40,452 INFO L87 Difference]: Start difference. First operand 344 states and 1169 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:40,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:40,532 INFO L93 Difference]: Finished difference Result 292 states and 992 transitions. [2021-10-24 11:10:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:10:40,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-24 11:10:40,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:40,534 INFO L225 Difference]: With dead ends: 292 [2021-10-24 11:10:40,534 INFO L226 Difference]: Without dead ends: 292 [2021-10-24 11:10:40,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-10-24 11:10:40,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-10-24 11:10:40,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 236. [2021-10-24 11:10:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.3404255319148937) internal successors, (785), 235 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 785 transitions. [2021-10-24 11:10:40,543 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 785 transitions. Word has length 22 [2021-10-24 11:10:40,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:40,544 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 785 transitions. [2021-10-24 11:10:40,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:40,544 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 785 transitions. [2021-10-24 11:10:40,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:40,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:40,546 INFO L512 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] [2021-10-24 11:10:40,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:40,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-10-24 11:10:40,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:10:40,951 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:40,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:40,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1873326669, now seen corresponding path program 9 times [2021-10-24 11:10:40,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:40,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71446630] [2021-10-24 11:10:40,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:10:40,952 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:40,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:40,953 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:40,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-24 11:10:41,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:10:41,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:41,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 11:10:41,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:42,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:42,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:42,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71446630] [2021-10-24 11:10:42,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71446630] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:42,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [681090622] [2021-10-24 11:10:42,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:10:42,441 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:42,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:10:42,441 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:10:42,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-10-24 11:10:43,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:10:43,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:43,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 11:10:43,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:43,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:44,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [681090622] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:10:44,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 11:10:44,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2021-10-24 11:10:44,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754532279] [2021-10-24 11:10:44,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:10:44,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:44,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:10:44,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-10-24 11:10:44,104 INFO L87 Difference]: Start difference. First operand 236 states and 785 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) [2021-10-24 11:10:44,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:44,377 INFO L93 Difference]: Finished difference Result 322 states and 1021 transitions. [2021-10-24 11:10:44,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:10:44,378 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 [2021-10-24 11:10:44,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:44,380 INFO L225 Difference]: With dead ends: 322 [2021-10-24 11:10:44,380 INFO L226 Difference]: Without dead ends: 322 [2021-10-24 11:10:44,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 409.8ms TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-10-24 11:10:44,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-10-24 11:10:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 244. [2021-10-24 11:10:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.3045267489711936) internal successors, (803), 243 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 803 transitions. [2021-10-24 11:10:44,400 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 803 transitions. Word has length 22 [2021-10-24 11:10:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:44,400 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 803 transitions. [2021-10-24 11:10:44,401 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) [2021-10-24 11:10:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 803 transitions. [2021-10-24 11:10:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:44,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:44,402 INFO L512 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] [2021-10-24 11:10:44,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:44,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2021-10-24 11:10:44,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:44,816 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:44,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:44,817 INFO L82 PathProgramCache]: Analyzing trace with hash 390191731, now seen corresponding path program 10 times [2021-10-24 11:10:44,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:44,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237637951] [2021-10-24 11:10:44,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 11:10:44,817 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:44,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:44,818 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:44,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-24 11:10:45,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 11:10:45,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:45,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 11:10:45,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:46,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:46,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:46,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237637951] [2021-10-24 11:10:46,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237637951] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:46,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1977278975] [2021-10-24 11:10:46,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 11:10:46,310 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:46,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:10:46,311 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:10:46,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-10-24 11:10:47,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 11:10:47,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:47,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:10:47,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:47,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:48,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1977278975] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:48,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683832325] [2021-10-24 11:10:48,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-24 11:10:48,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:10:48,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:10:48,044 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:10:48,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-24 11:10:49,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-24 11:10:49,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:49,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-24 11:10:49,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:49,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:49,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683832325] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:10:49,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-24 11:10:49,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 32 [2021-10-24 11:10:49,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304422945] [2021-10-24 11:10:49,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:10:49,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:10:49,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-10-24 11:10:49,780 INFO L87 Difference]: Start difference. First operand 244 states and 803 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) [2021-10-24 11:10:50,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:50,465 INFO L93 Difference]: Finished difference Result 548 states and 1665 transitions. [2021-10-24 11:10:50,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 11:10:50,466 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 [2021-10-24 11:10:50,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:50,469 INFO L225 Difference]: With dead ends: 548 [2021-10-24 11:10:50,469 INFO L226 Difference]: Without dead ends: 548 [2021-10-24 11:10:50,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 946.4ms TimeCoverageRelationStatistics Valid=299, Invalid=1033, Unknown=0, NotChecked=0, Total=1332 [2021-10-24 11:10:50,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-10-24 11:10:50,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 260. [2021-10-24 11:10:50,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.4015444015444016) internal successors, (881), 259 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:50,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 881 transitions. [2021-10-24 11:10:50,481 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 881 transitions. Word has length 22 [2021-10-24 11:10:50,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:50,482 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 881 transitions. [2021-10-24 11:10:50,482 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) [2021-10-24 11:10:50,482 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 881 transitions. [2021-10-24 11:10:50,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:50,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:50,484 INFO L512 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] [2021-10-24 11:10:50,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:50,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:50,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:51,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:10:51,090 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:51,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:51,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1251192067, now seen corresponding path program 11 times [2021-10-24 11:10:51,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:51,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548520371] [2021-10-24 11:10:51,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-24 11:10:51,091 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:51,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:51,092 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:51,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-24 11:10:52,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:10:52,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:52,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 11:10:52,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:52,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:52,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:52,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548520371] [2021-10-24 11:10:52,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548520371] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:10:52,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-24 11:10:52,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-24 11:10:52,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518594612] [2021-10-24 11:10:52,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:10:52,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:52,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:10:52,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:10:52,777 INFO L87 Difference]: Start difference. First operand 260 states and 881 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-10-24 11:10:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:53,117 INFO L93 Difference]: Finished difference Result 284 states and 950 transitions. [2021-10-24 11:10:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 11:10:53,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 [2021-10-24 11:10:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:53,119 INFO L225 Difference]: With dead ends: 284 [2021-10-24 11:10:53,119 INFO L226 Difference]: Without dead ends: 282 [2021-10-24 11:10:53,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 341.7ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-10-24 11:10:53,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-10-24 11:10:53,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 258. [2021-10-24 11:10:53,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.4007782101167314) internal successors, (874), 257 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 874 transitions. [2021-10-24 11:10:53,129 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 874 transitions. Word has length 22 [2021-10-24 11:10:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:53,129 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 874 transitions. [2021-10-24 11:10:53,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-10-24 11:10:53,129 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 874 transitions. [2021-10-24 11:10:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:53,130 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:53,130 INFO L512 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] [2021-10-24 11:10:53,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-10-24 11:10:53,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:10:53,343 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:10:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:53,344 INFO L82 PathProgramCache]: Analyzing trace with hash 2009010017, now seen corresponding path program 12 times [2021-10-24 11:10:53,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:53,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415220689] [2021-10-24 11:10:53,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 11:10:53,344 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:53,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:53,345 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:53,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-24 11:10:54,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-24 11:10:54,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:54,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 11:10:54,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:54,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:55,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:55,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415220689] [2021-10-24 11:10:55,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415220689] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:55,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267417076] [2021-10-24 11:10:55,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 11:10:55,015 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:10:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:10:55,016 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:10:55,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-10-24 11:10:56,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-24 11:10:56,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:56,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 11:10:56,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:56,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:56,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [267417076] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:56,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685678670] [2021-10-24 11:10:56,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-24 11:10:56,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:10:56,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:10:56,951 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:10:56,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-24 11:10:58,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-24 11:10:58,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:58,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-24 11:10:58,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:58,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:58,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685678670] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 11:10:58,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-24 11:10:58,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 22 [2021-10-24 11:10:58,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769306793] [2021-10-24 11:10:58,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:10:58,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:58,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:10:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-10-24 11:10:58,865 INFO L87 Difference]: Start difference. First operand 258 states and 874 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) [2021-10-24 11:10:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:59,499 INFO L93 Difference]: Finished difference Result 492 states and 1540 transitions. [2021-10-24 11:10:59,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:10:59,500 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 [2021-10-24 11:10:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:59,503 INFO L225 Difference]: With dead ends: 492 [2021-10-24 11:10:59,503 INFO L226 Difference]: Without dead ends: 492 [2021-10-24 11:10:59,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 678.0ms TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-10-24 11:10:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-10-24 11:10:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 256. [2021-10-24 11:10:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.384313725490196) internal successors, (863), 255 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 863 transitions. [2021-10-24 11:10:59,513 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 863 transitions. Word has length 22 [2021-10-24 11:10:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:59,514 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 863 transitions. [2021-10-24 11:10:59,514 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) [2021-10-24 11:10:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 863 transitions. [2021-10-24 11:10:59,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 11:10:59,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:59,515 INFO L512 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] [2021-10-24 11:10:59,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:59,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-10-24 11:10:59,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2021-10-24 11:11:00,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 11:11:00,144 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:11:00,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:11:00,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2135904269, now seen corresponding path program 13 times [2021-10-24 11:11:00,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:11:00,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510636124] [2021-10-24 11:11:00,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 11:11:00,145 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:11:00,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:11:00,145 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:11:00,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-24 11:11:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:11:01,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 11:11:01,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:11:01,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:11:01,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:11:01,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510636124] [2021-10-24 11:11:01,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510636124] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:11:01,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1877966179] [2021-10-24 11:11:01,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 11:11:01,919 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:11:01,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:11:01,920 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:11:01,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-10-24 11:11:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:11:03,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:11:03,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:11:03,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:11:03,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1877966179] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:11:03,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327004168] [2021-10-24 11:11:03,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-24 11:11:03,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:11:03,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:11:03,875 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:11:03,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-24 11:11:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:11:05,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-24 11:11:05,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:11:05,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:11:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:11:05,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327004168] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:11:05,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 11:11:05,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 9, 7] total 28 [2021-10-24 11:11:05,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5496370] [2021-10-24 11:11:05,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-24 11:11:05,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:11:05,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-24 11:11:05,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2021-10-24 11:11:05,791 INFO L87 Difference]: Start difference. First operand 256 states and 863 transitions. Second operand has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:11:07,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:11:07,757 INFO L93 Difference]: Finished difference Result 1000 states and 3159 transitions. [2021-10-24 11:11:07,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-24 11:11:07,760 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-24 11:11:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:11:07,768 INFO L225 Difference]: With dead ends: 1000 [2021-10-24 11:11:07,768 INFO L226 Difference]: Without dead ends: 1000 [2021-10-24 11:11:07,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1493.1ms TimeCoverageRelationStatistics Valid=622, Invalid=1448, Unknown=0, NotChecked=0, Total=2070 [2021-10-24 11:11:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-10-24 11:11:07,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 274. [2021-10-24 11:11:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.3223443223443225) internal successors, (907), 273 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:11:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 907 transitions. [2021-10-24 11:11:07,785 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 907 transitions. Word has length 22 [2021-10-24 11:11:07,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:11:07,785 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 907 transitions. [2021-10-24 11:11:07,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:11:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 907 transitions. [2021-10-24 11:11:07,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-24 11:11:07,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:11:07,787 INFO L512 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] [2021-10-24 11:11:07,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:08,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-10-24 11:11:08,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:08,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:11:08,393 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:11:08,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:11:08,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2045958948, now seen corresponding path program 1 times [2021-10-24 11:11:08,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:11:08,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355317530] [2021-10-24 11:11:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:11:08,394 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:11:08,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:11:08,395 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:11:08,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-24 11:11:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:11:09,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-24 11:11:09,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:11:09,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 85 [2021-10-24 11:11:10,064 INFO L354 Elim1Store]: treesize reduction 163, result has 15.1 percent of original size [2021-10-24 11:11:10,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-10-24 11:11:18,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:11:18,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:11:18,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:11:18,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:11:18,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:11:18,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:14:02,767 WARN L207 SmtUtils]: Spent 2.73 m on a formula simplification. DAG size of input: 347 DAG size of output: 123 [2021-10-24 11:14:02,769 INFO L354 Elim1Store]: treesize reduction 1666, result has 20.1 percent of original size [2021-10-24 11:14:02,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 108 treesize of output 463 [2021-10-24 11:19:16,008 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-24 11:19:16,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:19:16,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355317530] [2021-10-24 11:19:16,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-10-24 11:19:16,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [524464404] [2021-10-24 11:19:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:19:16,009 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:19:16,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:19:16,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-24 11:19:16,015 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:19:16,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-10-24 11:19:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:19:18,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-24 11:19:18,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:19:18,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-24 11:19:18,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286018124] [2021-10-24 11:19:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:19:18,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:19:18,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:19:18,137 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:19:18,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-24 11:19:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:19:19,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-24 11:19:19,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:19:19,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-24 11:19:19,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:19:19,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-24 11:19:19,568 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-24 11:19:19,568 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-24 11:19:19,572 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:19:19,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-24 11:19:19,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-24 11:19:19,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-24 11:19:19,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-24 11:19:19,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2021-10-24 11:19:19,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-10-24 11:19:20,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82496d8d-d83a-43af-ad32-bb6c862ad8bb/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:19:20,178 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-24 11:19:20,178 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:19:20,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:19:20 BasicIcfg [2021-10-24 11:19:20,195 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:19:20,195 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:19:20,196 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:19:20,196 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:19:20,199 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:09:26" (3/4) ... [2021-10-24 11:19:20,203 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 11:19:20,203 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:19:20,207 INFO L168 Benchmark]: Toolchain (without parser) took 595320.38 ms. Allocated memory was 65.0 MB in the beginning and 251.7 MB in the end (delta: 186.6 MB). Free memory was 44.9 MB in the beginning and 124.4 MB in the end (delta: -79.5 MB). Peak memory consumption was 108.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:20,207 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 65.0 MB. Free memory is still 46.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:19:20,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.49 ms. Allocated memory is still 65.0 MB. Free memory was 44.7 MB in the beginning and 46.9 MB in the end (delta: -2.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:20,210 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.28 ms. Allocated memory is still 65.0 MB. Free memory was 46.8 MB in the beginning and 44.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:20,210 INFO L168 Benchmark]: Boogie Preprocessor took 40.03 ms. Allocated memory is still 65.0 MB. Free memory was 44.7 MB in the beginning and 42.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:20,211 INFO L168 Benchmark]: RCFGBuilder took 1613.76 ms. Allocated memory was 65.0 MB in the beginning and 98.6 MB in the end (delta: 33.6 MB). Free memory was 42.7 MB in the beginning and 60.6 MB in the end (delta: -17.9 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:20,211 INFO L168 Benchmark]: TraceAbstraction took 593214.67 ms. Allocated memory was 98.6 MB in the beginning and 251.7 MB in the end (delta: 153.1 MB). Free memory was 60.1 MB in the beginning and 124.4 MB in the end (delta: -64.3 MB). Peak memory consumption was 88.2 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:20,211 INFO L168 Benchmark]: Witness Printer took 7.52 ms. Allocated memory is still 251.7 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:19:20,214 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 65.0 MB. Free memory is still 46.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 378.49 ms. Allocated memory is still 65.0 MB. Free memory was 44.7 MB in the beginning and 46.9 MB in the end (delta: -2.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.28 ms. Allocated memory is still 65.0 MB. Free memory was 46.8 MB in the beginning and 44.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.03 ms. Allocated memory is still 65.0 MB. Free memory was 44.7 MB in the beginning and 42.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1613.76 ms. Allocated memory was 65.0 MB in the beginning and 98.6 MB in the end (delta: 33.6 MB). Free memory was 42.7 MB in the beginning and 60.6 MB in the end (delta: -17.9 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 593214.67 ms. Allocated memory was 98.6 MB in the beginning and 251.7 MB in the end (delta: 153.1 MB). Free memory was 60.1 MB in the beginning and 124.4 MB in the end (delta: -64.3 MB). Peak memory consumption was 88.2 MB. Max. memory is 16.1 GB. * Witness Printer took 7.52 ms. Allocated memory is still 251.7 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 21588.2ms, 134 PlacesBefore, 34 PlacesAfterwards, 136 TransitionsBefore, 28 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 8 FixpointIterations, 74 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 129 TotalNumberOfCompositions, 1652 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1509, positive: 1472, positive conditional: 0, positive unconditional: 1472, negative: 37, negative conditional: 0, negative unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 897, positive: 886, positive conditional: 0, positive unconditional: 886, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 897, positive: 886, positive conditional: 0, positive unconditional: 886, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 11, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 564, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 564, negative conditional: 0, negative unconditional: 564, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1509, positive: 586, positive conditional: 0, positive unconditional: 586, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 897, unknown conditional: 0, unknown unconditional: 897] , Statistics on independence cache: Total cache size (in pairs): 62, Positive cache size: 60, Positive conditional cache size: 0, Positive unconditional cache size: 60, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 95]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L40] 0 int* A; [L41] 0 int res1, res2, M, N; [L77] 0 pthread_t t1, t2, t3; [L80] 0 M = __VERIFIER_nondet_int() [L81] 0 N = __VERIFIER_nondet_int() [L37] COND FALSE 0 !(!cond) [L37] COND FALSE 0 !(!cond) [L104] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L105] 0 int i = 0; [L105] COND TRUE 0 i < size [L106] 0 arr[i] = __VERIFIER_nondet_int() [L105] 0 i++ [L105] COND FALSE 0 !(i < size) [L108] 0 return arr; [L82] 0 A = create_fresh_int_array(N) [L37] COND TRUE 0 !cond [L87] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) [L47] 1 int i=0; [L47] COND TRUE 1 i