./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8 --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 f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:21:31,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:21:31,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:21:31,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:21:31,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:21:31,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:21:31,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:21:31,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:21:31,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:21:31,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:21:31,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:21:31,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:21:31,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:21:31,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:21:31,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:21:31,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:21:31,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:21:31,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:21:31,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:21:31,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:21:31,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:21:31,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:21:31,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:21:31,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:21:31,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:21:31,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:21:31,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:21:31,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:21:31,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:21:31,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:21:31,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:21:31,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:21:31,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:21:31,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:21:31,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:21:31,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:21:31,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:21:31,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:21:31,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:21:31,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:21:31,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:21:31,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:21:31,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:21:31,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:21:31,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:21:31,389 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:21:31,389 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:21:31,389 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:21:31,390 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:21:31,399 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:21:31,399 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:21:31,399 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:21:31,401 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:21:31,402 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:21:31,402 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:21:31,402 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:21:31,403 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:21:31,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:21:31,404 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:21:31,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:21:31,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:21:31,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:21:31,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:21:31,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:21:31,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:21:31,407 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:21:31,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:21:31,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:21:31,407 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:21:31,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:21:31,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:21:31,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:21:31,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:31,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:21:31,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:21:31,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:21:31,412 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:21:31,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:21:31,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:21:31,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:21:31,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:21:31,414 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_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc [2021-11-07 02:21:31,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:21:31,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:21:31,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:21:31,822 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:21:31,823 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:21:31,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2021-11-07 02:21:31,903 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/data/90a2fc691/dc4ce8a01668456a9675f871b2067171/FLAG706be42bd [2021-11-07 02:21:32,545 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:21:32,547 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2021-11-07 02:21:32,567 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/data/90a2fc691/dc4ce8a01668456a9675f871b2067171/FLAG706be42bd [2021-11-07 02:21:32,805 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/data/90a2fc691/dc4ce8a01668456a9675f871b2067171 [2021-11-07 02:21:32,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:21:32,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:21:32,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:32,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:21:32,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:21:32,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:32" (1/1) ... [2021-11-07 02:21:32,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@323d9a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:32, skipping insertion in model container [2021-11-07 02:21:32,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:32" (1/1) ... [2021-11-07 02:21:32,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:21:32,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:21:33,138 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_888f5c0e-3640-4b87-8890-bb0c72700822/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2021-11-07 02:21:33,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:33,163 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:21:33,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4685eb19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:33, skipping insertion in model container [2021-11-07 02:21:33,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:33,165 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:21:33,168 INFO L168 Benchmark]: Toolchain (without parser) took 351.51 ms. Allocated memory is still 98.6 MB. Free memory was 60.8 MB in the beginning and 73.6 MB in the end (delta: -12.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:21:33,169 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 98.6 MB. Free memory is still 77.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:21:33,170 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.03 ms. Allocated memory is still 98.6 MB. Free memory was 60.6 MB in the beginning and 73.6 MB in the end (delta: -13.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 02:21:33,172 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 98.6 MB. Free memory is still 77.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 344.03 ms. Allocated memory is still 98.6 MB. Free memory was 60.6 MB in the beginning and 73.6 MB in the end (delta: -13.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 160]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8 --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 f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:21:36,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:21:36,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:21:36,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:21:36,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:21:36,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:21:36,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:21:36,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:21:36,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:21:36,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:21:36,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:21:36,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:21:36,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:21:36,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:21:36,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:21:36,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:21:36,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:21:36,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:21:36,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:21:36,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:21:36,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:21:36,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:21:36,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:21:36,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:21:36,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:21:36,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:21:36,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:21:36,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:21:36,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:21:36,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:21:36,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:21:36,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:21:36,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:21:36,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:21:36,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:21:36,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:21:36,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:21:36,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:21:36,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:21:36,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:21:36,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:21:36,349 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:21:36,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:21:36,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:21:36,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:21:36,387 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:21:36,388 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:21:36,388 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:21:36,388 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:21:36,388 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:21:36,389 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:21:36,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:21:36,390 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:21:36,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:21:36,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:21:36,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:21:36,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:21:36,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:21:36,391 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:21:36,392 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:21:36,392 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:21:36,392 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:21:36,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:21:36,393 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:21:36,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:21:36,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:21:36,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:21:36,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:21:36,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:36,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:21:36,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:21:36,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:21:36,395 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:21:36,395 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:36,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:21:36,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:21:36,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:21:36,396 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_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc [2021-11-07 02:21:36,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:21:36,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:21:36,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:21:36,929 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:21:36,930 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:21:36,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2021-11-07 02:21:37,044 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/data/98484763b/cae7e806ffc1472798ad0e4c7cd537cb/FLAG77308eaa1 [2021-11-07 02:21:37,792 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:21:37,793 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2021-11-07 02:21:37,809 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/data/98484763b/cae7e806ffc1472798ad0e4c7cd537cb/FLAG77308eaa1 [2021-11-07 02:21:38,076 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/data/98484763b/cae7e806ffc1472798ad0e4c7cd537cb [2021-11-07 02:21:38,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:21:38,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:21:38,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:38,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:21:38,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:21:38,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:38" (1/1) ... [2021-11-07 02:21:38,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@374dfbf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:38, skipping insertion in model container [2021-11-07 02:21:38,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:38" (1/1) ... [2021-11-07 02:21:38,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:21:38,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:21:38,376 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_888f5c0e-3640-4b87-8890-bb0c72700822/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2021-11-07 02:21:38,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:38,465 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:21:38,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:21:38,522 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_888f5c0e-3640-4b87-8890-bb0c72700822/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2021-11-07 02:21:38,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:38,550 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:21:38,608 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_888f5c0e-3640-4b87-8890-bb0c72700822/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2021-11-07 02:21:38,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:38,630 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:21:38,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:38 WrapperNode [2021-11-07 02:21:38,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:38,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:21:38,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:21:38,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:21:38,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:38" (1/1) ... [2021-11-07 02:21:38,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:38" (1/1) ... [2021-11-07 02:21:38,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:21:38,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:21:38,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:21:38,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:21:38,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:38" (1/1) ... [2021-11-07 02:21:38,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:38" (1/1) ... [2021-11-07 02:21:38,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:38" (1/1) ... [2021-11-07 02:21:38,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:38" (1/1) ... [2021-11-07 02:21:38,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:38" (1/1) ... [2021-11-07 02:21:38,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:38" (1/1) ... [2021-11-07 02:21:38,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:38" (1/1) ... [2021-11-07 02:21:38,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:21:38,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:21:38,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:21:38,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:21:38,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:38" (1/1) ... [2021-11-07 02:21:38,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:38,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:21:38,848 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:21:38,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:21:38,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:21:38,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:21:38,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:21:38,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-07 02:21:38,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-07 02:21:38,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-07 02:21:38,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-07 02:21:38,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-07 02:21:38,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-07 02:21:38,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-11-07 02:21:38,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-11-07 02:21:38,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-07 02:21:38,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-07 02:21:38,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:21:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:21:38,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:21:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:21:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:21:38,916 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-07 02:21:41,411 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:21:41,411 INFO L299 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-07 02:21:41,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:21:41 BoogieIcfgContainer [2021-11-07 02:21:41,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:21:41,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:21:41,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:21:41,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:21:41,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:21:38" (1/3) ... [2021-11-07 02:21:41,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c307303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:21:41, skipping insertion in model container [2021-11-07 02:21:41,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:38" (2/3) ... [2021-11-07 02:21:41,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c307303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:21:41, skipping insertion in model container [2021-11-07 02:21:41,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:21:41" (3/3) ... [2021-11-07 02:21:41,434 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2021-11-07 02:21:41,441 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 02:21:41,441 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:21:41,441 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:21:41,442 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 02:21:41,523 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,523 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,524 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,524 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,524 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,525 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,525 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,525 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,525 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,525 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,526 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,526 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,526 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,526 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,527 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,528 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,528 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,529 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,529 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,530 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,530 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,530 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,531 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,531 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,532 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,532 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,532 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,532 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,533 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,533 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,533 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,533 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,533 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,534 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,534 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,534 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,534 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,535 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,535 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,535 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,535 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,536 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,536 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,536 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,537 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,537 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,537 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,537 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,539 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,539 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,540 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,540 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,540 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,541 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,542 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,542 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,542 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,542 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,543 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,543 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,543 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,543 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,543 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,544 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,544 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,545 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,545 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,545 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,545 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,545 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,546 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,546 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,546 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,547 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,547 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,548 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,551 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,552 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,552 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,552 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,554 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,554 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,555 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,556 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,556 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,563 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,563 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,564 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,564 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,564 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,564 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,565 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,565 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,566 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,567 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,567 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,568 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,568 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,569 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,569 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,569 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,569 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,570 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,570 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,570 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,570 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,571 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,571 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,571 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,571 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,571 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,572 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,572 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,572 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,581 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,581 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,582 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,582 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,582 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,582 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,583 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,583 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,583 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,585 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,586 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,586 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,586 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,586 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,587 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,587 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,588 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,588 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,588 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,588 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,589 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,589 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,591 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,592 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,592 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,592 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,592 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,593 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,594 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,594 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,599 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,599 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,599 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,602 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,602 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,603 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,603 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,603 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,603 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,604 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,604 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,604 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,604 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:21:41,614 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-11-07 02:21:41,696 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:21:41,707 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:21:41,707 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:21:41,734 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-07 02:21:41,748 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 231 transitions, 494 flow [2021-11-07 02:21:41,753 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 231 transitions, 494 flow [2021-11-07 02:21:41,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 222 places, 231 transitions, 494 flow [2021-11-07 02:21:41,910 INFO L129 PetriNetUnfolder]: 22/227 cut-off events. [2021-11-07 02:21:41,911 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-07 02:21:41,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 227 events. 22/227 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 122 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 191. Up to 2 conditions per place. [2021-11-07 02:21:41,924 INFO L116 LiptonReduction]: Number of co-enabled transitions 1824 [2021-11-07 02:22:09,448 WARN L207 SmtUtils]: Spent 5.90 s on a formula simplification. DAG size of input: 168 DAG size of output: 167 [2021-11-07 02:22:17,291 WARN L207 SmtUtils]: Spent 6.01 s on a formula simplification. DAG size of input: 174 DAG size of output: 173 [2021-11-07 02:22:19,445 INFO L131 LiptonReduction]: Checked pairs total: 2784 [2021-11-07 02:22:19,446 INFO L133 LiptonReduction]: Total number of compositions: 227 [2021-11-07 02:22:19,467 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 42 transitions, 116 flow [2021-11-07 02:22:19,561 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 527 states, 526 states have (on average 4.098859315589354) internal successors, (2156), 526 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 527 states, 526 states have (on average 4.098859315589354) internal successors, (2156), 526 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:19,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 02:22:19,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:19,607 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:19,607 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:22:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:19,614 INFO L85 PathProgramCache]: Analyzing trace with hash 786278235, now seen corresponding path program 1 times [2021-11-07 02:22:19,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:19,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191280280] [2021-11-07 02:22:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:19,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:19,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:19,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:22:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:19,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:22:19,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:20,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:20,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:20,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191280280] [2021-11-07 02:22:20,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191280280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:20,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:20,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-11-07 02:22:20,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915266433] [2021-11-07 02:22:20,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:22:20,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:20,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:22:20,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:22:20,276 INFO L87 Difference]: Start difference. First operand has 527 states, 526 states have (on average 4.098859315589354) internal successors, (2156), 526 states have internal predecessors, (2156), 0 states have call successors, (0), 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 3 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:20,359 INFO L93 Difference]: Finished difference Result 778 states and 3201 transitions. [2021-11-07 02:22:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:20,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 02:22:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:20,391 INFO L225 Difference]: With dead ends: 778 [2021-11-07 02:22:20,391 INFO L226 Difference]: Without dead ends: 749 [2021-11-07 02:22:20,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:22:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-07 02:22:20,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2021-11-07 02:22:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 4.124331550802139) internal successors, (3085), 748 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 3085 transitions. [2021-11-07 02:22:20,533 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 3085 transitions. Word has length 28 [2021-11-07 02:22:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:20,533 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 3085 transitions. [2021-11-07 02:22:20,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 3085 transitions. [2021-11-07 02:22:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 02:22:20,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:20,541 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:20,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:20,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:20,755 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:22:20,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:20,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1736676464, now seen corresponding path program 1 times [2021-11-07 02:22:20,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:20,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050821019] [2021-11-07 02:22:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:20,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:20,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:20,758 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:20,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:22:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:21,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:21,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:21,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:21,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:21,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050821019] [2021-11-07 02:22:21,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050821019] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:21,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:21,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:22:21,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726553728] [2021-11-07 02:22:21,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:21,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:21,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:21,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:21,557 INFO L87 Difference]: Start difference. First operand 749 states and 3085 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:21,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:21,640 INFO L93 Difference]: Finished difference Result 1103 states and 4353 transitions. [2021-11-07 02:22:21,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:21,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 02:22:21,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:21,658 INFO L225 Difference]: With dead ends: 1103 [2021-11-07 02:22:21,659 INFO L226 Difference]: Without dead ends: 1073 [2021-11-07 02:22:21,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-11-07 02:22:21,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 979. [2021-11-07 02:22:21,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 4.04601226993865) internal successors, (3957), 978 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 3957 transitions. [2021-11-07 02:22:21,725 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 3957 transitions. Word has length 30 [2021-11-07 02:22:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:21,725 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 3957 transitions. [2021-11-07 02:22:21,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 3957 transitions. [2021-11-07 02:22:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 02:22:21,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:21,733 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:21,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:21,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:21,953 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:22:21,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:21,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1598211690, now seen corresponding path program 1 times [2021-11-07 02:22:21,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:21,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249754107] [2021-11-07 02:22:21,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:21,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:21,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:21,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:21,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:22:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:22,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:22,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:22,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:22,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:22,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249754107] [2021-11-07 02:22:22,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249754107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:22,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:22,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:22:22,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489705854] [2021-11-07 02:22:22,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:22,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:22,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:22,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:22,577 INFO L87 Difference]: Start difference. First operand 979 states and 3957 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:22,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:22,639 INFO L93 Difference]: Finished difference Result 1329 states and 5116 transitions. [2021-11-07 02:22:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:22,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 02:22:22,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:22,657 INFO L225 Difference]: With dead ends: 1329 [2021-11-07 02:22:22,657 INFO L226 Difference]: Without dead ends: 1271 [2021-11-07 02:22:22,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-11-07 02:22:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1149. [2021-11-07 02:22:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 3.9634146341463414) internal successors, (4550), 1148 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 4550 transitions. [2021-11-07 02:22:22,725 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 4550 transitions. Word has length 30 [2021-11-07 02:22:22,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:22,725 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 4550 transitions. [2021-11-07 02:22:22,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 4550 transitions. [2021-11-07 02:22:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 02:22:22,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:22,733 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:22,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 02:22:22,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:22,948 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:22:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:22,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2010811763, now seen corresponding path program 1 times [2021-11-07 02:22:22,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:22,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015329401] [2021-11-07 02:22:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:22,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:22,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:22,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:23,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:22:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:23,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:22:23,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:22:23,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:22:23,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:23,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015329401] [2021-11-07 02:22:23,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015329401] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:23,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:23,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:22:23,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573078943] [2021-11-07 02:22:23,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:22:23,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:23,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:22:23,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:23,667 INFO L87 Difference]: Start difference. First operand 1149 states and 4550 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:23,858 INFO L93 Difference]: Finished difference Result 1738 states and 6561 transitions. [2021-11-07 02:22:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:23,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 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 31 [2021-11-07 02:22:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:23,881 INFO L225 Difference]: With dead ends: 1738 [2021-11-07 02:22:23,881 INFO L226 Difference]: Without dead ends: 1648 [2021-11-07 02:22:23,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-11-07 02:22:23,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1460. [2021-11-07 02:22:23,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.928032899246059) internal successors, (5731), 1459 states have internal predecessors, (5731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5731 transitions. [2021-11-07 02:22:23,983 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5731 transitions. Word has length 31 [2021-11-07 02:22:23,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:23,984 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 5731 transitions. [2021-11-07 02:22:23,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:23,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5731 transitions. [2021-11-07 02:22:23,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 02:22:23,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:23,993 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:24,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:24,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:24,208 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:22:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:24,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1636087794, now seen corresponding path program 1 times [2021-11-07 02:22:24,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:24,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877260512] [2021-11-07 02:22:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:24,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:24,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:24,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:24,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:22:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:24,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:22:24,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:22:24,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:22:24,960 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:24,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877260512] [2021-11-07 02:22:24,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877260512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:24,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:24,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:22:24,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809977004] [2021-11-07 02:22:24,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:22:24,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:24,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:22:24,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:24,963 INFO L87 Difference]: Start difference. First operand 1460 states and 5731 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:25,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:25,155 INFO L93 Difference]: Finished difference Result 2075 states and 7793 transitions. [2021-11-07 02:22:25,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:25,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 31 [2021-11-07 02:22:25,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:25,185 INFO L225 Difference]: With dead ends: 2075 [2021-11-07 02:22:25,185 INFO L226 Difference]: Without dead ends: 1945 [2021-11-07 02:22:25,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:25,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-11-07 02:22:25,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1701. [2021-11-07 02:22:25,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 3.91) internal successors, (6647), 1700 states have internal predecessors, (6647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 6647 transitions. [2021-11-07 02:22:25,321 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 6647 transitions. Word has length 31 [2021-11-07 02:22:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:25,321 INFO L470 AbstractCegarLoop]: Abstraction has 1701 states and 6647 transitions. [2021-11-07 02:22:25,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:25,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 6647 transitions. [2021-11-07 02:22:25,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 02:22:25,332 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:25,332 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:25,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:25,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:25,548 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:22:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:25,548 INFO L85 PathProgramCache]: Analyzing trace with hash 742517622, now seen corresponding path program 1 times [2021-11-07 02:22:25,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:25,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413332376] [2021-11-07 02:22:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:25,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:25,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:25,551 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:25,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:22:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:25,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:22:25,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:22:26,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:22:26,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:26,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413332376] [2021-11-07 02:22:26,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413332376] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:26,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:26,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 02:22:26,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861935883] [2021-11-07 02:22:26,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 02:22:26,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:26,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 02:22:26,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:22:26,667 INFO L87 Difference]: Start difference. First operand 1701 states and 6647 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:28,031 INFO L93 Difference]: Finished difference Result 2347 states and 8986 transitions. [2021-11-07 02:22:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 02:22:28,033 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 02:22:28,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:28,087 INFO L225 Difference]: With dead ends: 2347 [2021-11-07 02:22:28,087 INFO L226 Difference]: Without dead ends: 2281 [2021-11-07 02:22:28,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:22:28,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-11-07 02:22:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1763. [2021-11-07 02:22:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 3.8711691259931897) internal successors, (6821), 1762 states have internal predecessors, (6821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 6821 transitions. [2021-11-07 02:22:28,254 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 6821 transitions. Word has length 32 [2021-11-07 02:22:28,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:28,256 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 6821 transitions. [2021-11-07 02:22:28,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:28,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 6821 transitions. [2021-11-07 02:22:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 02:22:28,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:28,274 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:28,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:28,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:28,489 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:22:28,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:28,490 INFO L85 PathProgramCache]: Analyzing trace with hash 992565852, now seen corresponding path program 2 times [2021-11-07 02:22:28,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:28,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917539104] [2021-11-07 02:22:28,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:22:28,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:28,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:28,496 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:28,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:22:29,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:22:29,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:22:29,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:22:29,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:22:29,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:22:29,995 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:29,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917539104] [2021-11-07 02:22:29,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917539104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:29,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:29,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 02:22:29,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43682242] [2021-11-07 02:22:29,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 02:22:29,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:29,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 02:22:29,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:22:29,998 INFO L87 Difference]: Start difference. First operand 1763 states and 6821 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:31,836 INFO L93 Difference]: Finished difference Result 4371 states and 15733 transitions. [2021-11-07 02:22:31,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 02:22:31,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 02:22:31,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:31,889 INFO L225 Difference]: With dead ends: 4371 [2021-11-07 02:22:31,890 INFO L226 Difference]: Without dead ends: 4008 [2021-11-07 02:22:31,891 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=307, Invalid=749, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 02:22:31,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2021-11-07 02:22:32,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 1882. [2021-11-07 02:22:32,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.92876129718235) internal successors, (7390), 1881 states have internal predecessors, (7390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:32,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 7390 transitions. [2021-11-07 02:22:32,082 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 7390 transitions. Word has length 32 [2021-11-07 02:22:32,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:32,083 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 7390 transitions. [2021-11-07 02:22:32,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:32,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 7390 transitions. [2021-11-07 02:22:32,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 02:22:32,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:32,093 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:32,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:32,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:32,310 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:22:32,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1277764702, now seen corresponding path program 1 times [2021-11-07 02:22:32,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:32,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934758736] [2021-11-07 02:22:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:32,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:32,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:32,313 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:32,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:22:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:32,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:22:32,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:22:33,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:22:33,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:33,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934758736] [2021-11-07 02:22:33,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934758736] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:33,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2039688827] [2021-11-07 02:22:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:33,511 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:33,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:33,518 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:33,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 02:22:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:34,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:22:34,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:22:34,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:22:34,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2039688827] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:34,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925935165] [2021-11-07 02:22:34,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:34,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:22:34,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:22:34,604 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:22:34,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 02:22:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:34,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 02:22:34,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:22:35,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:35,634 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 02:22:35,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 11 [2021-11-07 02:22:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:22:36,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925935165] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:36,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:22:36,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 8, 8] total 25 [2021-11-07 02:22:36,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439977604] [2021-11-07 02:22:36,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 02:22:36,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:36,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 02:22:36,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-11-07 02:22:36,254 INFO L87 Difference]: Start difference. First operand 1882 states and 7390 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:37,937 INFO L93 Difference]: Finished difference Result 4290 states and 15949 transitions. [2021-11-07 02:22:37,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 02:22:37,938 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 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 33 [2021-11-07 02:22:37,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:37,962 INFO L225 Difference]: With dead ends: 4290 [2021-11-07 02:22:37,962 INFO L226 Difference]: Without dead ends: 3619 [2021-11-07 02:22:37,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 02:22:37,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-11-07 02:22:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 1377. [2021-11-07 02:22:38,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 3.8924418604651163) internal successors, (5356), 1376 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 5356 transitions. [2021-11-07 02:22:38,064 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 5356 transitions. Word has length 33 [2021-11-07 02:22:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:38,064 INFO L470 AbstractCegarLoop]: Abstraction has 1377 states and 5356 transitions. [2021-11-07 02:22:38,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 5356 transitions. [2021-11-07 02:22:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 02:22:38,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:38,086 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:38,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-07 02:22:38,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:38,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-07 02:22:38,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:38,703 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:22:38,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:38,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1323421508, now seen corresponding path program 1 times [2021-11-07 02:22:38,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:38,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702589150] [2021-11-07 02:22:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:38,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:38,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:38,706 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:38,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:22:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:39,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:22:39,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:39,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:39,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:39,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702589150] [2021-11-07 02:22:39,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702589150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:39,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1425093468] [2021-11-07 02:22:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:39,945 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:39,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:39,949 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:39,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 02:22:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:40,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:22:40,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:22:40,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:22:41,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1425093468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:41,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077635704] [2021-11-07 02:22:41,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:41,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:22:41,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:22:41,144 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:22:41,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 02:22:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:41,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:22:41,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:42,734 INFO L354 Elim1Store]: treesize reduction 302, result has 45.6 percent of original size [2021-11-07 02:22:42,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 112 treesize of output 294 [2021-11-07 02:22:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:22:46,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:46,852 INFO L354 Elim1Store]: treesize reduction 298, result has 44.7 percent of original size [2021-11-07 02:22:46,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 86 treesize of output 257 [2021-11-07 02:22:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:22:48,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077635704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:48,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:22:48,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 9, 9] total 23 [2021-11-07 02:22:48,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528566926] [2021-11-07 02:22:48,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 02:22:48,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:48,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 02:22:48,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:22:48,773 INFO L87 Difference]: Start difference. First operand 1377 states and 5356 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:50,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:50,309 INFO L93 Difference]: Finished difference Result 3653 states and 13360 transitions. [2021-11-07 02:22:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 02:22:50,310 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 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 33 [2021-11-07 02:22:50,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:50,353 INFO L225 Difference]: With dead ends: 3653 [2021-11-07 02:22:50,353 INFO L226 Difference]: Without dead ends: 2738 [2021-11-07 02:22:50,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 02:22:50,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2021-11-07 02:22:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 932. [2021-11-07 02:22:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 3.9301825993555317) internal successors, (3659), 931 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 3659 transitions. [2021-11-07 02:22:50,464 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 3659 transitions. Word has length 33 [2021-11-07 02:22:50,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:50,465 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 3659 transitions. [2021-11-07 02:22:50,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:50,466 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 3659 transitions. [2021-11-07 02:22:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:22:50,470 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:50,471 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:50,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:50,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:50,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:51,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:22:51,085 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:22:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:51,086 INFO L85 PathProgramCache]: Analyzing trace with hash 691502488, now seen corresponding path program 1 times [2021-11-07 02:22:51,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:51,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480340918] [2021-11-07 02:22:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:51,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:51,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:51,088 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:51,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:22:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:51,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 02:22:51,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:22:52,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:22:52,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:52,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480340918] [2021-11-07 02:22:52,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480340918] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:52,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1986618232] [2021-11-07 02:22:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:52,735 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:52,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:52,745 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:52,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 02:22:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:53,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:22:53,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:53,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:54,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1986618232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:54,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272312584] [2021-11-07 02:22:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:54,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:22:54,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:22:54,359 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:22:54,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 02:22:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:54,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:22:54,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:55,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:56,207 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 02:22:56,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 11 [2021-11-07 02:22:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:56,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272312584] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:56,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:22:56,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 9, 8] total 24 [2021-11-07 02:22:56,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075444967] [2021-11-07 02:22:56,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 02:22:56,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:56,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 02:22:56,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-11-07 02:22:56,448 INFO L87 Difference]: Start difference. First operand 932 states and 3659 transitions. Second operand has 25 states, 25 states have (on average 3.52) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:58,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:58,820 INFO L93 Difference]: Finished difference Result 2508 states and 9936 transitions. [2021-11-07 02:22:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:22:58,821 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.52) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 02:22:58,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:58,837 INFO L225 Difference]: With dead ends: 2508 [2021-11-07 02:22:58,837 INFO L226 Difference]: Without dead ends: 2508 [2021-11-07 02:22:58,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 02:22:58,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-11-07 02:22:58,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 1094. [2021-11-07 02:22:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.969807868252516) internal successors, (4339), 1093 states have internal predecessors, (4339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 4339 transitions. [2021-11-07 02:22:58,918 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 4339 transitions. Word has length 35 [2021-11-07 02:22:58,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:58,920 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 4339 transitions. [2021-11-07 02:22:58,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.52) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 4339 transitions. [2021-11-07 02:22:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:22:58,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:58,942 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:58,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:59,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:59,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-07 02:22:59,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:22:59,547 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:22:59,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:59,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1651581630, now seen corresponding path program 1 times [2021-11-07 02:22:59,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:59,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755006578] [2021-11-07 02:22:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:59,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:59,550 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:59,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:23:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:00,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:23:00,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:00,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:01,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:01,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755006578] [2021-11-07 02:23:01,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755006578] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:23:01,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 02:23:01,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-11-07 02:23:01,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906263171] [2021-11-07 02:23:01,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:01,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:01,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:01,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:23:01,274 INFO L87 Difference]: Start difference. First operand 1094 states and 4339 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2021-11-07 02:23:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:01,938 INFO L93 Difference]: Finished difference Result 1590 states and 6369 transitions. [2021-11-07 02:23:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:23:01,941 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 35 [2021-11-07 02:23:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:01,951 INFO L225 Difference]: With dead ends: 1590 [2021-11-07 02:23:01,952 INFO L226 Difference]: Without dead ends: 1590 [2021-11-07 02:23:01,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:23:01,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-11-07 02:23:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1244. [2021-11-07 02:23:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 4.008849557522124) internal successors, (4983), 1243 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4983 transitions. [2021-11-07 02:23:02,018 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4983 transitions. Word has length 35 [2021-11-07 02:23:02,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:02,019 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 4983 transitions. [2021-11-07 02:23:02,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2021-11-07 02:23:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4983 transitions. [2021-11-07 02:23:02,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:23:02,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:02,026 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:02,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 02:23:02,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:02,244 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:23:02,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:02,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1138195156, now seen corresponding path program 2 times [2021-11-07 02:23:02,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:02,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710756851] [2021-11-07 02:23:02,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:23:02,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:02,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:02,247 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:02,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:23:03,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:23:03,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:03,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:03,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:23:03,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:23:03,728 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:03,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710756851] [2021-11-07 02:23:03,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710756851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:03,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:03,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 02:23:03,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054633936] [2021-11-07 02:23:03,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:23:03,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:03,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:23:03,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:23:03,731 INFO L87 Difference]: Start difference. First operand 1244 states and 4983 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:04,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:04,227 INFO L93 Difference]: Finished difference Result 1910 states and 7565 transitions. [2021-11-07 02:23:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:23:04,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 02:23:04,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:04,237 INFO L225 Difference]: With dead ends: 1910 [2021-11-07 02:23:04,237 INFO L226 Difference]: Without dead ends: 1870 [2021-11-07 02:23:04,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:23:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-11-07 02:23:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1372. [2021-11-07 02:23:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 4.0401167031363965) internal successors, (5539), 1371 states have internal predecessors, (5539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 5539 transitions. [2021-11-07 02:23:04,308 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 5539 transitions. Word has length 35 [2021-11-07 02:23:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:04,308 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 5539 transitions. [2021-11-07 02:23:04,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 5539 transitions. [2021-11-07 02:23:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:23:04,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:04,315 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:04,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:04,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:04,536 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:23:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:04,537 INFO L85 PathProgramCache]: Analyzing trace with hash 721948632, now seen corresponding path program 3 times [2021-11-07 02:23:04,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:04,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9325672] [2021-11-07 02:23:04,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:23:04,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:04,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:04,540 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:04,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:23:05,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:23:05,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:05,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:05,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:23:05,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:23:06,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:06,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9325672] [2021-11-07 02:23:06,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9325672] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:23:06,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 02:23:06,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-07 02:23:06,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122490459] [2021-11-07 02:23:06,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:23:06,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:06,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:23:06,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:23:06,127 INFO L87 Difference]: Start difference. First operand 1372 states and 5539 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 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) [2021-11-07 02:23:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:06,572 INFO L93 Difference]: Finished difference Result 1770 states and 7095 transitions. [2021-11-07 02:23:06,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:23:06,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 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 35 [2021-11-07 02:23:06,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:06,581 INFO L225 Difference]: With dead ends: 1770 [2021-11-07 02:23:06,581 INFO L226 Difference]: Without dead ends: 1770 [2021-11-07 02:23:06,582 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:23:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2021-11-07 02:23:06,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1328. [2021-11-07 02:23:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 4.018839487565939) internal successors, (5333), 1327 states have internal predecessors, (5333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 5333 transitions. [2021-11-07 02:23:06,651 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 5333 transitions. Word has length 35 [2021-11-07 02:23:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:06,652 INFO L470 AbstractCegarLoop]: Abstraction has 1328 states and 5333 transitions. [2021-11-07 02:23:06,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 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) [2021-11-07 02:23:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 5333 transitions. [2021-11-07 02:23:06,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:23:06,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:06,658 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:06,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:06,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:06,878 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:23:06,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:06,879 INFO L85 PathProgramCache]: Analyzing trace with hash -362602818, now seen corresponding path program 2 times [2021-11-07 02:23:06,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:06,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091388972] [2021-11-07 02:23:06,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:23:06,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:06,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:06,881 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:06,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:23:07,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:23:07,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:07,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:07,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:08,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:08,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:08,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091388972] [2021-11-07 02:23:08,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091388972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:08,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:08,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 02:23:08,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009324467] [2021-11-07 02:23:08,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:23:08,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:08,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:23:08,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:23:08,322 INFO L87 Difference]: Start difference. First operand 1328 states and 5333 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:08,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:08,904 INFO L93 Difference]: Finished difference Result 1926 states and 7652 transitions. [2021-11-07 02:23:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:23:08,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 02:23:08,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:08,911 INFO L225 Difference]: With dead ends: 1926 [2021-11-07 02:23:08,911 INFO L226 Difference]: Without dead ends: 1882 [2021-11-07 02:23:08,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:23:08,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-11-07 02:23:08,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1476. [2021-11-07 02:23:08,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 4.048135593220339) internal successors, (5971), 1475 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:08,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 5971 transitions. [2021-11-07 02:23:08,988 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 5971 transitions. Word has length 35 [2021-11-07 02:23:08,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:08,989 INFO L470 AbstractCegarLoop]: Abstraction has 1476 states and 5971 transitions. [2021-11-07 02:23:08,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:08,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 5971 transitions. [2021-11-07 02:23:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:23:08,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:08,996 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:09,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:09,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:09,216 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:23:09,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1494942808, now seen corresponding path program 3 times [2021-11-07 02:23:09,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:09,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385899235] [2021-11-07 02:23:09,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:23:09,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:09,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:09,219 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:09,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:23:10,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 02:23:10,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:23:10,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:23:10,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:23:11,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:11,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385899235] [2021-11-07 02:23:11,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385899235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:11,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [11828985] [2021-11-07 02:23:11,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:23:11,294 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:11,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:11,295 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:11,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 02:23:13,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 02:23:13,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:13,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:23:13,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:23:13,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:23:13,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [11828985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:13,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496015566] [2021-11-07 02:23:13,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:23:13,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:23:13,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:23:13,537 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:23:13,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 02:23:14,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 02:23:14,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:14,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:23:14,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:23:15,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:23:16,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496015566] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:23:16,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-07 02:23:16,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 6, 6, 6, 7] total 21 [2021-11-07 02:23:16,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470363825] [2021-11-07 02:23:16,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:23:16,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:23:16,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:23:16,067 INFO L87 Difference]: Start difference. First operand 1476 states and 5971 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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) [2021-11-07 02:23:16,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:16,933 INFO L93 Difference]: Finished difference Result 4882 states and 19947 transitions. [2021-11-07 02:23:16,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:23:16,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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 35 [2021-11-07 02:23:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:16,949 INFO L225 Difference]: With dead ends: 4882 [2021-11-07 02:23:16,949 INFO L226 Difference]: Without dead ends: 4882 [2021-11-07 02:23:16,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-11-07 02:23:16,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2021-11-07 02:23:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 1978. [2021-11-07 02:23:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 4.366717248356095) internal successors, (8633), 1977 states have internal predecessors, (8633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 8633 transitions. [2021-11-07 02:23:17,130 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 8633 transitions. Word has length 35 [2021-11-07 02:23:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:17,131 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 8633 transitions. [2021-11-07 02:23:17,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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) [2021-11-07 02:23:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 8633 transitions. [2021-11-07 02:23:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:23:17,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:17,141 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:17,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:17,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-07 02:23:17,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:17,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:23:17,762 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:23:17,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:17,763 INFO L85 PathProgramCache]: Analyzing trace with hash 199405606, now seen corresponding path program 4 times [2021-11-07 02:23:17,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:17,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244931786] [2021-11-07 02:23:17,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:23:17,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:17,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:17,765 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:17,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:23:18,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:23:18,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:18,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:18,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:18,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:18,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:18,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244931786] [2021-11-07 02:23:18,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244931786] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:18,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:18,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 02:23:18,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184797262] [2021-11-07 02:23:18,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:23:18,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:18,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:23:18,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:23:18,906 INFO L87 Difference]: Start difference. First operand 1978 states and 8633 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:19,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:19,597 INFO L93 Difference]: Finished difference Result 3044 states and 13003 transitions. [2021-11-07 02:23:19,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:23:19,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 02:23:19,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:19,607 INFO L225 Difference]: With dead ends: 3044 [2021-11-07 02:23:19,607 INFO L226 Difference]: Without dead ends: 3000 [2021-11-07 02:23:19,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:23:19,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-11-07 02:23:19,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 1826. [2021-11-07 02:23:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 4.254246575342465) internal successors, (7764), 1825 states have internal predecessors, (7764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 7764 transitions. [2021-11-07 02:23:19,746 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 7764 transitions. Word has length 35 [2021-11-07 02:23:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:19,746 INFO L470 AbstractCegarLoop]: Abstraction has 1826 states and 7764 transitions. [2021-11-07 02:23:19,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 7764 transitions. [2021-11-07 02:23:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:23:19,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:19,756 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:19,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:19,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:19,975 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:23:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash 2056951232, now seen corresponding path program 5 times [2021-11-07 02:23:19,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:19,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503645281] [2021-11-07 02:23:19,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:23:19,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:19,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:19,977 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:19,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:23:20,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:23:20,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:20,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:20,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:20,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:21,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:21,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503645281] [2021-11-07 02:23:21,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503645281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:21,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:21,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:23:21,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715841266] [2021-11-07 02:23:21,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:23:21,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:21,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:23:21,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:23:21,015 INFO L87 Difference]: Start difference. First operand 1826 states and 7764 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:21,467 INFO L93 Difference]: Finished difference Result 3422 states and 14014 transitions. [2021-11-07 02:23:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:23:21,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 02:23:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:21,481 INFO L225 Difference]: With dead ends: 3422 [2021-11-07 02:23:21,482 INFO L226 Difference]: Without dead ends: 3422 [2021-11-07 02:23:21,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:23:21,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-11-07 02:23:21,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 1830. [2021-11-07 02:23:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1829 states have (on average 4.252597047566977) internal successors, (7778), 1829 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 7778 transitions. [2021-11-07 02:23:21,576 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 7778 transitions. Word has length 35 [2021-11-07 02:23:21,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:21,576 INFO L470 AbstractCegarLoop]: Abstraction has 1830 states and 7778 transitions. [2021-11-07 02:23:21,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 7778 transitions. [2021-11-07 02:23:21,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:23:21,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:21,585 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:21,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:21,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:21,807 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:23:21,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:21,807 INFO L85 PathProgramCache]: Analyzing trace with hash 169552294, now seen corresponding path program 6 times [2021-11-07 02:23:21,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:21,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027016164] [2021-11-07 02:23:21,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:23:21,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:21,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:21,809 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:21,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 02:23:22,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 02:23:22,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:22,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:22,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:23,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:23,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:23,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027016164] [2021-11-07 02:23:23,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027016164] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:23,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:23,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-07 02:23:23,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404732773] [2021-11-07 02:23:23,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:23,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:23,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:23,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:23:23,135 INFO L87 Difference]: Start difference. First operand 1830 states and 7778 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:23,703 INFO L93 Difference]: Finished difference Result 2372 states and 10032 transitions. [2021-11-07 02:23:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:23:23,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 02:23:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:23,710 INFO L225 Difference]: With dead ends: 2372 [2021-11-07 02:23:23,711 INFO L226 Difference]: Without dead ends: 2284 [2021-11-07 02:23:23,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:23:23,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-11-07 02:23:23,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1678. [2021-11-07 02:23:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 4.2886106141920095) internal successors, (7192), 1677 states have internal predecessors, (7192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 7192 transitions. [2021-11-07 02:23:23,785 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 7192 transitions. Word has length 35 [2021-11-07 02:23:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:23,786 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 7192 transitions. [2021-11-07 02:23:23,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 7192 transitions. [2021-11-07 02:23:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:23:23,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:23,794 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:23,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:24,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:24,008 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:23:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:24,009 INFO L85 PathProgramCache]: Analyzing trace with hash -398706990, now seen corresponding path program 4 times [2021-11-07 02:23:24,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:24,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727837724] [2021-11-07 02:23:24,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:23:24,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:24,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:24,011 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:24,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 02:23:24,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:23:24,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:24,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:24,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:23:25,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:23:25,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:25,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727837724] [2021-11-07 02:23:25,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727837724] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:25,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:25,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 02:23:25,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451190746] [2021-11-07 02:23:25,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:23:25,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:25,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:23:25,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:23:25,264 INFO L87 Difference]: Start difference. First operand 1678 states and 7192 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:25,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:25,936 INFO L93 Difference]: Finished difference Result 2394 states and 10240 transitions. [2021-11-07 02:23:25,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:23:25,937 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 02:23:25,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:25,944 INFO L225 Difference]: With dead ends: 2394 [2021-11-07 02:23:25,944 INFO L226 Difference]: Without dead ends: 2340 [2021-11-07 02:23:25,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:23:25,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-11-07 02:23:26,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 1678. [2021-11-07 02:23:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 4.249254621347645) internal successors, (7126), 1677 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 7126 transitions. [2021-11-07 02:23:26,016 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 7126 transitions. Word has length 35 [2021-11-07 02:23:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:26,017 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 7126 transitions. [2021-11-07 02:23:26,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 7126 transitions. [2021-11-07 02:23:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:23:26,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:26,025 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:26,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-07 02:23:26,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:26,249 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:23:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:26,249 INFO L85 PathProgramCache]: Analyzing trace with hash -814953514, now seen corresponding path program 5 times [2021-11-07 02:23:26,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:26,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864520667] [2021-11-07 02:23:26,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:23:26,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:26,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:26,253 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:26,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 02:23:27,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:23:27,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:27,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:27,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:23:27,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:23:27,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:27,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864520667] [2021-11-07 02:23:27,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864520667] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:23:27,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 02:23:27,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-07 02:23:27,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895960207] [2021-11-07 02:23:27,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:23:27,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:27,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:23:27,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:23:27,632 INFO L87 Difference]: Start difference. First operand 1678 states and 7126 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 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) [2021-11-07 02:23:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:27,922 INFO L93 Difference]: Finished difference Result 2600 states and 10425 transitions. [2021-11-07 02:23:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:23:27,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 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 35 [2021-11-07 02:23:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:27,931 INFO L225 Difference]: With dead ends: 2600 [2021-11-07 02:23:27,932 INFO L226 Difference]: Without dead ends: 2600 [2021-11-07 02:23:27,932 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:23:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-11-07 02:23:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 1522. [2021-11-07 02:23:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 4.1531886916502305) internal successors, (6317), 1521 states have internal predecessors, (6317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 6317 transitions. [2021-11-07 02:23:28,011 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 6317 transitions. Word has length 35 [2021-11-07 02:23:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:28,012 INFO L470 AbstractCegarLoop]: Abstraction has 1522 states and 6317 transitions. [2021-11-07 02:23:28,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 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) [2021-11-07 02:23:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 6317 transitions. [2021-11-07 02:23:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:23:28,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:28,020 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:28,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:28,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:28,236 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:23:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:28,237 INFO L85 PathProgramCache]: Analyzing trace with hash 406126902, now seen corresponding path program 6 times [2021-11-07 02:23:28,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:28,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316165742] [2021-11-07 02:23:28,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:23:28,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:28,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:28,241 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:28,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 02:23:29,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:23:29,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:29,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:29,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:23:29,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:23:29,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:29,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316165742] [2021-11-07 02:23:29,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316165742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:29,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:29,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-07 02:23:29,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29058463] [2021-11-07 02:23:29,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:29,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:29,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:29,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:23:29,631 INFO L87 Difference]: Start difference. First operand 1522 states and 6317 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:30,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:30,125 INFO L93 Difference]: Finished difference Result 1828 states and 7581 transitions. [2021-11-07 02:23:30,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:23:30,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 02:23:30,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:30,131 INFO L225 Difference]: With dead ends: 1828 [2021-11-07 02:23:30,131 INFO L226 Difference]: Without dead ends: 1734 [2021-11-07 02:23:30,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:23:30,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-11-07 02:23:30,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1358. [2021-11-07 02:23:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 4.1525423728813555) internal successors, (5635), 1357 states have internal predecessors, (5635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 5635 transitions. [2021-11-07 02:23:30,176 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 5635 transitions. Word has length 35 [2021-11-07 02:23:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:30,177 INFO L470 AbstractCegarLoop]: Abstraction has 1358 states and 5635 transitions. [2021-11-07 02:23:30,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 5635 transitions. [2021-11-07 02:23:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:23:30,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:30,183 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:30,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-07 02:23:30,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:30,412 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:23:30,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:30,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1473917856, now seen corresponding path program 7 times [2021-11-07 02:23:30,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:30,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544627031] [2021-11-07 02:23:30,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:23:30,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:30,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:30,414 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:30,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 02:23:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:31,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:31,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:31,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:32,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:32,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544627031] [2021-11-07 02:23:32,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544627031] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:32,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:32,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:23:32,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763291853] [2021-11-07 02:23:32,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:23:32,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:23:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:23:32,053 INFO L87 Difference]: Start difference. First operand 1358 states and 5635 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:32,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:32,644 INFO L93 Difference]: Finished difference Result 2126 states and 8807 transitions. [2021-11-07 02:23:32,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:23:32,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 02:23:32,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:32,651 INFO L225 Difference]: With dead ends: 2126 [2021-11-07 02:23:32,651 INFO L226 Difference]: Without dead ends: 2126 [2021-11-07 02:23:32,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:23:32,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-11-07 02:23:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 966. [2021-11-07 02:23:32,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 3.8310880829015543) internal successors, (3697), 965 states have internal predecessors, (3697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:32,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 3697 transitions. [2021-11-07 02:23:32,690 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 3697 transitions. Word has length 35 [2021-11-07 02:23:32,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:32,690 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 3697 transitions. [2021-11-07 02:23:32,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:32,690 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 3697 transitions. [2021-11-07 02:23:32,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 02:23:32,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:32,693 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:32,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:32,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:32,894 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 02:23:32,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:32,895 INFO L85 PathProgramCache]: Analyzing trace with hash 200928403, now seen corresponding path program 1 times [2021-11-07 02:23:32,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:32,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966310673] [2021-11-07 02:23:32,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:32,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:32,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:32,896 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:32,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 02:23:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:34,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 02:23:34,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:35,431 INFO L354 Elim1Store]: treesize reduction 163, result has 15.1 percent of original size [2021-11-07 02:23:35,432 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 30 treesize of output 39 [2021-11-07 02:31:42,953 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-07 02:31:42,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:31:42,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966310673] [2021-11-07 02:31:42,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/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") [2021-11-07 02:31:42,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1531085086] [2021-11-07 02:31:42,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:31:42,955 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:31:42,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:31:42,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-07 02:31:42,961 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:31:42,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 02:31:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:31:45,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 02:31:45,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:31:45,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-07 02:31:45,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500693431] [2021-11-07 02:31:45,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:31:45,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:31:45,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:31:45,095 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:31:45,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 02:31:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:31:46,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-07 02:31:46,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:31:46,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-07 02:31:46,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:31:46,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 02:31:46,200 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-07 02:31:46,200 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 02:31:46,205 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 02:31:46,207 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-11-07 02:31:46,207 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-11-07 02:31:46,207 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-11-07 02:31:46,207 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATION [2021-11-07 02:31:46,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 02:31:46,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:31:46,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-07 02:31:46,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888f5c0e-3640-4b87-8890-bb0c72700822/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:31:46,832 INFO L731 BasicCegarLoop]: Path program histogram: [7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:31:46,841 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-07 02:31:46,841 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 02:31:46,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:31:46 BasicIcfg [2021-11-07 02:31:46,891 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 02:31:46,891 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 02:31:46,892 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 02:31:46,892 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 02:31:46,894 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:21:41" (3/4) ... [2021-11-07 02:31:46,897 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 02:31:46,897 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 02:31:46,898 INFO L168 Benchmark]: Toolchain (without parser) took 608817.94 ms. Allocated memory was 65.0 MB in the beginning and 337.6 MB in the end (delta: 272.6 MB). Free memory was 44.7 MB in the beginning and 157.8 MB in the end (delta: -113.1 MB). Peak memory consumption was 159.8 MB. Max. memory is 16.1 GB. [2021-11-07 02:31:46,898 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 65.0 MB. Free memory is still 45.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:31:46,898 INFO L168 Benchmark]: CACSL2BoogieTranslator took 549.80 ms. Allocated memory is still 65.0 MB. Free memory was 44.5 MB in the beginning and 43.7 MB in the end (delta: 788.3 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:31:46,899 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.71 ms. Allocated memory is still 65.0 MB. Free memory was 43.5 MB in the beginning and 40.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 02:31:46,899 INFO L168 Benchmark]: Boogie Preprocessor took 90.80 ms. Allocated memory is still 65.0 MB. Free memory was 40.7 MB in the beginning and 38.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:31:46,900 INFO L168 Benchmark]: RCFGBuilder took 2609.18 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 38.3 MB in the beginning and 41.2 MB in the end (delta: -2.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-07 02:31:46,900 INFO L168 Benchmark]: TraceAbstraction took 605474.12 ms. Allocated memory was 86.0 MB in the beginning and 337.6 MB in the end (delta: 251.7 MB). Free memory was 40.8 MB in the beginning and 157.8 MB in the end (delta: -117.0 MB). Peak memory consumption was 135.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:31:46,900 INFO L168 Benchmark]: Witness Printer took 5.78 ms. Allocated memory is still 337.6 MB. Free memory is still 157.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:31:46,902 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 65.0 MB. Free memory is still 45.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 549.80 ms. Allocated memory is still 65.0 MB. Free memory was 44.5 MB in the beginning and 43.7 MB in the end (delta: 788.3 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.71 ms. Allocated memory is still 65.0 MB. Free memory was 43.5 MB in the beginning and 40.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 90.80 ms. Allocated memory is still 65.0 MB. Free memory was 40.7 MB in the beginning and 38.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2609.18 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 38.3 MB in the beginning and 41.2 MB in the end (delta: -2.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 605474.12 ms. Allocated memory was 86.0 MB in the beginning and 337.6 MB in the end (delta: 251.7 MB). Free memory was 40.8 MB in the beginning and 157.8 MB in the end (delta: -117.0 MB). Peak memory consumption was 135.5 MB. Max. memory is 16.1 GB. * Witness Printer took 5.78 ms. Allocated memory is still 337.6 MB. Free memory is still 157.8 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: 37.6s, 222 PlacesBefore, 48 PlacesAfterwards, 231 TransitionsBefore, 42 TransitionsAfterwards, 1824 CoEnabledTransitionPairs, 7 FixpointIterations, 147 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 30 TrivialYvCompositions, 8 ConcurrentYvCompositions, 15 ChoiceCompositions, 227 TotalNumberOfCompositions, 2784 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2275, positive: 2205, positive conditional: 0, positive unconditional: 2205, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1180, positive: 1164, positive conditional: 0, positive unconditional: 1164, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1180, positive: 1162, positive conditional: 0, positive unconditional: 1162, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 18, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1374, positive: 208, positive conditional: 0, positive unconditional: 208, negative: 1165, negative conditional: 0, negative unconditional: 1165, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2275, positive: 1041, positive conditional: 0, positive unconditional: 1041, negative: 54, negative conditional: 0, negative unconditional: 54, unknown: 1180, unknown conditional: 0, unknown unconditional: 1180] , Statistics on independence cache: Total cache size (in pairs): 158, Positive cache size: 151, Positive conditional cache size: 0, Positive unconditional cache size: 151, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 151]: 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: [L41] 0 int *q1, *q2, *f; [L42] 0 int q1_front, q1_back, q2_front, q2_back, i, j, n1, n2, N, total; [L125] 0 pthread_t t1, t2, t3, t4; [L127] 0 N = __VERIFIER_nondet_int() [L128] 0 n1 = __VERIFIER_nondet_int() [L129] 0 n2 = __VERIFIER_nondet_int() [L130] 0 q1_front = __VERIFIER_nondet_int() [L131] 0 q1_back = q1_front [L132] 0 q2_front = __VERIFIER_nondet_int() [L133] 0 q2_back = q2_front [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L160] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L161] 0 int i = 0; [L161] COND TRUE 0 i < size [L162] 0 arr[i] = __VERIFIER_nondet_int() [L161] 0 i++ [L164] 0 return arr; [L134] 0 q1 = create_fresh_int_array(n1) [L38] COND TRUE 0 !cond [L38] COND FALSE 0 !(!cond) [L160] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L161] 0 int i = 0; [L161] COND TRUE 0 i < size [L162] 0 arr[i] = __VERIFIER_nondet_int() [L161] 0 i++ [L164] 0 return arr; [L135] 0 q2 = create_fresh_int_array(n2) [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L160] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L161] 0 int i = 0; [L161] COND TRUE 0 i < size [L162] 0 arr[i] = __VERIFIER_nondet_int() [L161] 0 i++ [L164] 0 return arr; [L136] 0 f = create_fresh_int_array(N) [L38] COND TRUE 0 !cond [L141] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) [L49] 1 _Bool cond = i < N; [L142] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) [L69] 2 _Bool cond = j < N; [L71] COND TRUE 2 \read(cond) [L38] COND FALSE 2 !(!cond) [L74] 2 f[j] [L38] COND TRUE 2 !cond [L75] 2 q2[q2_back] [L75] 2 f[j] [L38] COND TRUE 2 !cond [L38] COND FALSE 2 !(!cond) [L77] 2 q2_back++ [L78] 2 j++ [L81] 2 cond = j < N [L85] 2 return 0; [L51] COND TRUE 1 \read(cond) [L38] COND FALSE 1 !(!cond) [L54] 1 q1[q1_back] [L54] 1 f[i] [L38] COND TRUE 1 !cond [L38] COND TRUE 1 !cond [L56] 1 q1_back++ [L57] 1 i++ [L60] 1 cond = i < N [L51] COND FALSE 1 !(\read(cond)) [L64] 1 return 0; [L143] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) [L90] 3 _Bool cond = i < N || q1_front < q1_back; [L92] COND TRUE 3 \read(cond) [L38] COND FALSE 3 !(!cond) [L95] EXPR 3 q1[q1_front] [L38] COND TRUE 3 !cond [L38] COND TRUE 3 !cond [L170] 3 return a + b; [L95] 3 total = plus(total, q1[q1_front]) [L96] 3 q1_front++ [L144] FCALL, FORK 0 pthread_create(&t4, 0, thread4, 0) [L108] 4 _Bool cond = j < N || q2_front < q2_back; [L110] COND TRUE 4 \read(cond) [L38] COND FALSE 4 !(!cond) [L113] EXPR 4 q2[q2_front] [L38] COND FALSE 4 !(!cond) [L38] COND TRUE 4 !cond [L170] 4 return a + b; [L113] 4 total = plus(total, q2[q2_front]) [L114] 4 q2_front++ [L117] 4 cond = j < N || q2_front < q2_back [L121] 4 return 0; [L145] 0 \read(t1) [L145] FCALL, JOIN 1 pthread_join(t1, 0) [L146] 0 \read(t2) [L146] FCALL, JOIN 2 pthread_join(t2, 0) [L147] 0 \read(t3) [L99] 3 cond = i < N || q1_front < q1_back [L92] COND FALSE 3 !(\read(cond)) [L103] 3 return 0; [L147] FCALL, JOIN 3 pthread_join(t3, 0) [L148] 0 \read(t4) [L148] FCALL, JOIN 4 pthread_join(t4, 0) [L38] COND TRUE 0 !cond [L151] 0 reach_error() - UnprovableResult [Line: 141]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 143]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 142]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 144]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 242 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 605.1s, OverallIterations: 23, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.2s, AutomataDifference: 16.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 37.8s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1375 SDtfs, 3895 SDslu, 4486 SDs, 0 SdLazy, 2707 SolverSat, 405 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2091 GetRequests, 1800 SyntacticMatches, 1 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1978occurred in iteration=15, InterpolantAutomatonStates: 210, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 19998 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 8.3s SatisfiabilityAnalysisTime, 513.4s InterpolantComputationTime, 1044 NumberOfCodeBlocks, 1027 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 1954 ConstructedInterpolants, 18 QuantifiedInterpolants, 7659 SizeOfPredicates, 244 NumberOfNonLiveVariables, 5496 ConjunctsInSsa, 295 ConjunctsInUnsatCore, 60 InterpolantComputations, 34 PerfectInterpolantSequences, 240/276 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN