./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a27e6fc2049c9dc12360bd8cd7682ef33f4a19a5a5a6c0e7a780c3703a0494b5 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:11:24,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:11:24,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:11:24,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:11:24,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:11:24,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:11:24,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:11:24,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:11:24,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:11:24,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:11:24,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:11:24,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:11:24,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:11:24,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:11:24,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:11:24,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:11:24,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:11:24,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:11:24,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:11:24,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:11:24,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:11:24,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:11:24,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:11:24,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:11:24,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:11:24,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:11:24,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:11:24,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:11:24,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:11:24,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:11:24,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:11:24,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:11:24,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:11:24,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:11:24,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:11:24,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:11:24,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:11:24,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:11:24,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:11:24,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:11:24,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:11:24,417 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 20:11:24,468 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:11:24,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:11:24,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:11:24,469 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:11:24,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:11:24,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:11:24,470 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:11:24,471 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:11:24,471 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:11:24,471 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:11:24,472 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:11:24,472 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:11:24,473 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:11:24,473 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:11:24,473 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:11:24,473 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:11:24,474 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:11:24,474 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:11:24,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 20:11:24,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 20:11:24,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:11:24,475 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:11:24,476 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 20:11:24,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:11:24,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:11:24,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:11:24,477 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 20:11:24,477 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 20:11:24,477 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 20:11:24,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:11:24,478 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:11:24,478 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:11:24,478 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:11:24,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:11:24,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:11:24,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:11:24,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:11:24,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:11:24,480 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:11:24,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:11:24,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:11:24,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:11:24,482 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_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a27e6fc2049c9dc12360bd8cd7682ef33f4a19a5a5a6c0e7a780c3703a0494b5 [2021-11-25 20:11:24,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:11:24,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:11:24,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:11:24,775 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:11:24,776 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:11:24,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i [2021-11-25 20:11:24,836 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/data/e0db2f61a/2221ce25b17140fab40085bd61dd5a1a/FLAGeba196550 [2021-11-25 20:11:25,356 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:11:25,357 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i [2021-11-25 20:11:25,379 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/data/e0db2f61a/2221ce25b17140fab40085bd61dd5a1a/FLAGeba196550 [2021-11-25 20:11:25,685 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/data/e0db2f61a/2221ce25b17140fab40085bd61dd5a1a [2021-11-25 20:11:25,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:11:25,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:11:25,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:11:25,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:11:25,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:11:25,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:11:25" (1/1) ... [2021-11-25 20:11:25,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fbf1ca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:25, skipping insertion in model container [2021-11-25 20:11:25,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:11:25" (1/1) ... [2021-11-25 20:11:25,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:11:25,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:11:26,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:11:26,046 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) [2021-11-25 20:11:26,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@835c7bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:26, skipping insertion in model container [2021-11-25 20:11:26,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:11:26,048 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-25 20:11:26,049 INFO L158 Benchmark]: Toolchain (without parser) took 357.67ms. Allocated memory is still 83.9MB. Free memory was 54.8MB in the beginning and 58.1MB in the end (delta: -3.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 20:11:26,050 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 83.9MB. Free memory is still 41.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:11:26,051 INFO L158 Benchmark]: CACSL2BoogieTranslator took 354.02ms. Allocated memory is still 83.9MB. Free memory was 54.6MB in the beginning and 58.1MB in the end (delta: -3.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 20:11:26,052 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 83.9MB. Free memory is still 41.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 354.02ms. Allocated memory is still 83.9MB. Free memory was 54.6MB in the beginning and 58.1MB in the end (delta: -3.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 575]: 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_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a27e6fc2049c9dc12360bd8cd7682ef33f4a19a5a5a6c0e7a780c3703a0494b5 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:11:28,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:11:28,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:11:28,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:11:28,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:11:28,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:11:28,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:11:28,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:11:28,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:11:28,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:11:28,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:11:28,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:11:28,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:11:28,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:11:28,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:11:28,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:11:28,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:11:28,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:11:28,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:11:28,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:11:28,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:11:28,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:11:28,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:11:28,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:11:28,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:11:28,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:11:28,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:11:28,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:11:28,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:11:28,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:11:28,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:11:28,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:11:28,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:11:28,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:11:28,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:11:28,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:11:28,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:11:28,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:11:28,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:11:28,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:11:28,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:11:28,294 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 20:11:28,344 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:11:28,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:11:28,345 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:11:28,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:11:28,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:11:28,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:11:28,347 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:11:28,347 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:11:28,347 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:11:28,348 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:11:28,349 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:11:28,349 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:11:28,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 20:11:28,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 20:11:28,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:11:28,351 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:11:28,352 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 20:11:28,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:11:28,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:11:28,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:11:28,353 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 20:11:28,353 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 20:11:28,353 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 20:11:28,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:11:28,354 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:11:28,354 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 20:11:28,354 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 20:11:28,354 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:11:28,355 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:11:28,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:11:28,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 20:11:28,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:11:28,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:11:28,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:11:28,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:11:28,357 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 20:11:28,357 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 20:11:28,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:11:28,358 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:11:28,358 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_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a27e6fc2049c9dc12360bd8cd7682ef33f4a19a5a5a6c0e7a780c3703a0494b5 [2021-11-25 20:11:28,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:11:28,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:11:28,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:11:28,768 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:11:28,769 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:11:28,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i [2021-11-25 20:11:28,841 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/data/e7ba14d43/306975116ed6443a8438c119119e2a40/FLAGa27f136a6 [2021-11-25 20:11:29,454 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:11:29,455 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i [2021-11-25 20:11:29,468 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/data/e7ba14d43/306975116ed6443a8438c119119e2a40/FLAGa27f136a6 [2021-11-25 20:11:29,766 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/data/e7ba14d43/306975116ed6443a8438c119119e2a40 [2021-11-25 20:11:29,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:11:29,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:11:29,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:11:29,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:11:29,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:11:29,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:11:29" (1/1) ... [2021-11-25 20:11:29,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46a790e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:29, skipping insertion in model container [2021-11-25 20:11:29,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:11:29" (1/1) ... [2021-11-25 20:11:29,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:11:29,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:11:30,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:11:30,115 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 20:11:30,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:11:30,171 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:11:30,190 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:11:30,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:11:30,296 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:11:30,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:30 WrapperNode [2021-11-25 20:11:30,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:11:30,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:11:30,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:11:30,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:11:30,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:30" (1/1) ... [2021-11-25 20:11:30,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:30" (1/1) ... [2021-11-25 20:11:30,371 INFO L137 Inliner]: procedures = 120, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2021-11-25 20:11:30,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:11:30,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:11:30,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:11:30,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:11:30,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:30" (1/1) ... [2021-11-25 20:11:30,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:30" (1/1) ... [2021-11-25 20:11:30,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:30" (1/1) ... [2021-11-25 20:11:30,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:30" (1/1) ... [2021-11-25 20:11:30,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:30" (1/1) ... [2021-11-25 20:11:30,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:30" (1/1) ... [2021-11-25 20:11:30,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:30" (1/1) ... [2021-11-25 20:11:30,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:11:30,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:11:30,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:11:30,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:11:30,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:30" (1/1) ... [2021-11-25 20:11:30,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:11:30,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:30,450 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:11:30,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:11:30,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:11:30,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:11:30,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:11:30,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:11:30,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:11:30,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 20:11:30,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:11:30,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:11:30,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:11:30,620 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:11:30,622 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:11:31,007 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:11:31,013 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:11:31,013 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:11:31,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:11:31 BoogieIcfgContainer [2021-11-25 20:11:31,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:11:31,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:11:31,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:11:31,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:11:31,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:11:29" (1/3) ... [2021-11-25 20:11:31,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a489068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:11:31, skipping insertion in model container [2021-11-25 20:11:31,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:30" (2/3) ... [2021-11-25 20:11:31,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a489068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:11:31, skipping insertion in model container [2021-11-25 20:11:31,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:11:31" (3/3) ... [2021-11-25 20:11:31,028 INFO L111 eAbstractionObserver]: Analyzing ICFG array-realloc-2.i [2021-11-25 20:11:31,033 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:11:31,034 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-11-25 20:11:31,092 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:11:31,100 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-25 20:11:31,101 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-11-25 20:11:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 35 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) [2021-11-25 20:11:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:11:31,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:31,126 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:11:31,127 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:31,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:31,133 INFO L85 PathProgramCache]: Analyzing trace with hash 925662, now seen corresponding path program 1 times [2021-11-25 20:11:31,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:31,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284208366] [2021-11-25 20:11:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:31,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:31,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:31,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:31,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 20:11:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:31,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:11:31,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:31,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:31,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:31,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284208366] [2021-11-25 20:11:31,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284208366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:31,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:31,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:11:31,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967950427] [2021-11-25 20:11:31,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:31,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:11:31,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:31,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:11:31,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:11:31,340 INFO L87 Difference]: Start difference. First operand has 36 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 35 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:31,453 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-11-25 20:11:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:11:31,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-25 20:11:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:31,464 INFO L225 Difference]: With dead ends: 37 [2021-11-25 20:11:31,464 INFO L226 Difference]: Without dead ends: 34 [2021-11-25 20:11:31,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:11:31,470 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:31,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:11:31,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-25 20:11:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-25 20:11:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.85) internal successors, (37), 33 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) [2021-11-25 20:11:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-11-25 20:11:31,507 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 4 [2021-11-25 20:11:31,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:31,516 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-11-25 20:11:31,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:31,521 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-11-25 20:11:31,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:11:31,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:31,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:11:31,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:31,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:31,732 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:31,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:31,733 INFO L85 PathProgramCache]: Analyzing trace with hash 925669, now seen corresponding path program 1 times [2021-11-25 20:11:31,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:31,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043616237] [2021-11-25 20:11:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:31,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:31,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:31,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:31,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 20:11:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:31,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:11:31,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:31,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:31,884 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-25 20:11:31,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 13 treesize of output 18 [2021-11-25 20:11:31,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:11:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:31,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:31,914 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:31,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043616237] [2021-11-25 20:11:31,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043616237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:31,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:31,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:11:31,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66092686] [2021-11-25 20:11:31,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:31,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:11:31,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:31,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:11:31,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:11:31,917 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:32,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:32,046 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-11-25 20:11:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:11:32,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-25 20:11:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:32,048 INFO L225 Difference]: With dead ends: 51 [2021-11-25 20:11:32,048 INFO L226 Difference]: Without dead ends: 51 [2021-11-25 20:11:32,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:11:32,050 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:32,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 40 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:11:32,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-25 20:11:32,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-11-25 20:11:32,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2021-11-25 20:11:32,058 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 4 [2021-11-25 20:11:32,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:32,058 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2021-11-25 20:11:32,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:32,059 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2021-11-25 20:11:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:11:32,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:32,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:11:32,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:32,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:32,272 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:32,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:32,273 INFO L85 PathProgramCache]: Analyzing trace with hash 925670, now seen corresponding path program 1 times [2021-11-25 20:11:32,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:32,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741900775] [2021-11-25 20:11:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:32,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:32,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:32,278 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:32,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 20:11:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:32,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:11:32,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:32,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:11:32,377 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 20:11:32,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-25 20:11:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:32,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:32,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:32,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741900775] [2021-11-25 20:11:32,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741900775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:32,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:32,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:11:32,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801750860] [2021-11-25 20:11:32,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:32,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:11:32,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:32,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:11:32,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:11:32,404 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:32,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:32,502 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-11-25 20:11:32,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:11:32,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-25 20:11:32,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:32,505 INFO L225 Difference]: With dead ends: 58 [2021-11-25 20:11:32,505 INFO L226 Difference]: Without dead ends: 58 [2021-11-25 20:11:32,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:11:32,506 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:32,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:11:32,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-25 20:11:32,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2021-11-25 20:11:32,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 46 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-11-25 20:11:32,514 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 4 [2021-11-25 20:11:32,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:32,514 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-11-25 20:11:32,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:32,514 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-11-25 20:11:32,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 20:11:32,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:32,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 20:11:32,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:32,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:32,728 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash 889567415, now seen corresponding path program 1 times [2021-11-25 20:11:32,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:32,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327884104] [2021-11-25 20:11:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:32,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:32,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:32,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:32,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 20:11:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:32,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:11:32,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:32,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-25 20:11:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:32,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:32,825 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:32,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327884104] [2021-11-25 20:11:32,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327884104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:32,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:32,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:11:32,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785479817] [2021-11-25 20:11:32,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:32,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:11:32,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:32,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:11:32,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:11:32,828 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:32,941 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2021-11-25 20:11:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:11:32,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-25 20:11:32,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:32,943 INFO L225 Difference]: With dead ends: 66 [2021-11-25 20:11:32,943 INFO L226 Difference]: Without dead ends: 66 [2021-11-25 20:11:32,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:11:32,945 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 22 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:32,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 87 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:11:32,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-25 20:11:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2021-11-25 20:11:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-11-25 20:11:32,951 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 6 [2021-11-25 20:11:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:32,952 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-11-25 20:11:32,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-11-25 20:11:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:11:32,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:32,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:32,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:33,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:33,166 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:33,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:33,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1806786797, now seen corresponding path program 1 times [2021-11-25 20:11:33,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:33,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470391079] [2021-11-25 20:11:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:33,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:33,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:33,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:33,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 20:11:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:33,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:11:33,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:33,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:33,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470391079] [2021-11-25 20:11:33,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470391079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:33,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:33,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:11:33,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951087001] [2021-11-25 20:11:33,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:33,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:11:33,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:33,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:11:33,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:11:33,274 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:33,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:33,466 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-11-25 20:11:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:11:33,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-25 20:11:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:33,467 INFO L225 Difference]: With dead ends: 68 [2021-11-25 20:11:33,467 INFO L226 Difference]: Without dead ends: 68 [2021-11-25 20:11:33,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:11:33,469 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:33,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 53 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:11:33,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-25 20:11:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2021-11-25 20:11:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2021-11-25 20:11:33,475 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 7 [2021-11-25 20:11:33,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:33,476 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2021-11-25 20:11:33,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:33,476 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2021-11-25 20:11:33,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:11:33,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:33,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:33,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:33,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:33,688 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:33,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1806786798, now seen corresponding path program 1 times [2021-11-25 20:11:33,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:33,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111755157] [2021-11-25 20:11:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:33,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:33,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:33,690 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:33,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 20:11:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:33,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:11:33,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:33,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:33,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:33,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111755157] [2021-11-25 20:11:33,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111755157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:33,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:33,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:11:33,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498702578] [2021-11-25 20:11:33,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:33,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:11:33,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:33,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:11:33,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:11:33,853 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:33,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:33,982 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2021-11-25 20:11:33,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:11:33,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-25 20:11:33,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:33,983 INFO L225 Difference]: With dead ends: 61 [2021-11-25 20:11:33,984 INFO L226 Difference]: Without dead ends: 61 [2021-11-25 20:11:33,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:11:33,985 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:33,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 55 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:11:33,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-25 20:11:33,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2021-11-25 20:11:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.65) internal successors, (66), 50 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2021-11-25 20:11:33,990 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 7 [2021-11-25 20:11:33,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:33,991 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2021-11-25 20:11:33,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2021-11-25 20:11:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 20:11:33,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:33,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:34,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:34,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:34,200 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1454266352, now seen corresponding path program 1 times [2021-11-25 20:11:34,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:34,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764021818] [2021-11-25 20:11:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:34,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:34,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:34,202 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:34,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 20:11:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:34,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:11:34,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:34,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:11:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:34,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:34,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:34,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764021818] [2021-11-25 20:11:34,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764021818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:34,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:34,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:11:34,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237426226] [2021-11-25 20:11:34,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:34,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:11:34,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:34,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:11:34,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:11:34,330 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:34,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:34,472 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2021-11-25 20:11:34,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:11:34,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-25 20:11:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:34,474 INFO L225 Difference]: With dead ends: 66 [2021-11-25 20:11:34,475 INFO L226 Difference]: Without dead ends: 66 [2021-11-25 20:11:34,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:11:34,475 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:34,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:11:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-25 20:11:34,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-11-25 20:11:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2021-11-25 20:11:34,481 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 10 [2021-11-25 20:11:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:34,481 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2021-11-25 20:11:34,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2021-11-25 20:11:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:11:34,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:34,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:34,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:34,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:34,682 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:34,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:34,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2132584042, now seen corresponding path program 1 times [2021-11-25 20:11:34,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:34,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334043948] [2021-11-25 20:11:34,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:34,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:34,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:34,685 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:34,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 20:11:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:34,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:11:34,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:34,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-25 20:11:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:34,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:34,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:34,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334043948] [2021-11-25 20:11:34,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334043948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:34,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:34,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:11:34,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862940558] [2021-11-25 20:11:34,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:34,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:11:34,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:34,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:11:34,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:11:34,896 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:35,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:35,111 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2021-11-25 20:11:35,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:11:35,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-11-25 20:11:35,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:35,113 INFO L225 Difference]: With dead ends: 65 [2021-11-25 20:11:35,113 INFO L226 Difference]: Without dead ends: 65 [2021-11-25 20:11:35,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:11:35,114 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:35,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 69 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:11:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-25 20:11:35,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2021-11-25 20:11:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-11-25 20:11:35,119 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 11 [2021-11-25 20:11:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:35,119 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-11-25 20:11:35,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:35,120 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-11-25 20:11:35,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 20:11:35,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:35,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:35,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:35,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:35,321 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:35,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:35,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1685595954, now seen corresponding path program 1 times [2021-11-25 20:11:35,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:35,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341887570] [2021-11-25 20:11:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:35,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:35,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:35,322 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:35,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 20:11:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:35,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:11:35,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:35,410 INFO L354 Elim1Store]: treesize reduction 12, result has 57.1 percent of original size [2021-11-25 20:11:35,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 13 treesize of output 26 [2021-11-25 20:11:35,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-25 20:11:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:35,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:35,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:35,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341887570] [2021-11-25 20:11:35,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341887570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:35,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:35,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:11:35,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069423211] [2021-11-25 20:11:35,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:35,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:11:35,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:11:35,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:11:35,488 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:35,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:35,673 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2021-11-25 20:11:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:11:35,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-25 20:11:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:35,675 INFO L225 Difference]: With dead ends: 64 [2021-11-25 20:11:35,675 INFO L226 Difference]: Without dead ends: 64 [2021-11-25 20:11:35,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:11:35,676 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:35,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 62 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:11:35,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-25 20:11:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2021-11-25 20:11:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2021-11-25 20:11:35,681 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 12 [2021-11-25 20:11:35,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:35,681 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2021-11-25 20:11:35,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2021-11-25 20:11:35,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 20:11:35,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:35,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:35,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:35,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:35,893 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:35,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:35,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1602458348, now seen corresponding path program 1 times [2021-11-25 20:11:35,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:35,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399513169] [2021-11-25 20:11:35,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:35,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:35,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:35,895 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:35,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 20:11:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:35,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:11:35,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:36,013 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-25 20:11:36,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 18 [2021-11-25 20:11:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:36,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:36,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:36,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399513169] [2021-11-25 20:11:36,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399513169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:36,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:36,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:11:36,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763013256] [2021-11-25 20:11:36,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:36,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:11:36,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:36,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:11:36,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:11:36,038 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:36,136 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2021-11-25 20:11:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:11:36,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-25 20:11:36,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:36,137 INFO L225 Difference]: With dead ends: 62 [2021-11-25 20:11:36,138 INFO L226 Difference]: Without dead ends: 62 [2021-11-25 20:11:36,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:11:36,138 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:36,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 44 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:11:36,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-25 20:11:36,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-11-25 20:11:36,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 49 states have (on average 1.530612244897959) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2021-11-25 20:11:36,144 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 12 [2021-11-25 20:11:36,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:36,144 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2021-11-25 20:11:36,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2021-11-25 20:11:36,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 20:11:36,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:36,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:36,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:36,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:36,359 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:36,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1602458347, now seen corresponding path program 1 times [2021-11-25 20:11:36,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:36,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345373157] [2021-11-25 20:11:36,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:36,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:36,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:36,361 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:36,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 20:11:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:36,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:11:36,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:36,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 20:11:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:36,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:36,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:36,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345373157] [2021-11-25 20:11:36,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345373157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:36,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:36,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:11:36,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776613543] [2021-11-25 20:11:36,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:36,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:11:36,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:36,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:11:36,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:11:36,567 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:36,781 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2021-11-25 20:11:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:11:36,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-25 20:11:36,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:36,783 INFO L225 Difference]: With dead ends: 90 [2021-11-25 20:11:36,783 INFO L226 Difference]: Without dead ends: 90 [2021-11-25 20:11:36,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:11:36,784 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 73 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:36,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 79 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:11:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-25 20:11:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2021-11-25 20:11:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.509433962264151) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2021-11-25 20:11:36,796 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 12 [2021-11-25 20:11:36,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:36,797 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2021-11-25 20:11:36,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2021-11-25 20:11:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:11:36,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:36,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:36,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:37,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:37,009 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:37,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:37,009 INFO L85 PathProgramCache]: Analyzing trace with hash 713867117, now seen corresponding path program 1 times [2021-11-25 20:11:37,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:37,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970533257] [2021-11-25 20:11:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:37,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:37,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:37,011 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:37,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 20:11:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:37,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:11:37,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:37,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:37,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:37,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970533257] [2021-11-25 20:11:37,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970533257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:37,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:37,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:11:37,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541828537] [2021-11-25 20:11:37,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:37,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:11:37,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:11:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:11:37,134 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:37,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:37,180 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2021-11-25 20:11:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:11:37,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-11-25 20:11:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:37,182 INFO L225 Difference]: With dead ends: 60 [2021-11-25 20:11:37,182 INFO L226 Difference]: Without dead ends: 60 [2021-11-25 20:11:37,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:11:37,183 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:37,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 53 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:11:37,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-25 20:11:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-25 20:11:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.52) internal successors, (76), 59 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:37,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2021-11-25 20:11:37,186 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 13 [2021-11-25 20:11:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:37,187 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2021-11-25 20:11:37,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:37,187 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2021-11-25 20:11:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:11:37,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:37,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:37,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:37,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:37,388 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:37,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1863398776, now seen corresponding path program 1 times [2021-11-25 20:11:37,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:37,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955325035] [2021-11-25 20:11:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:37,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:37,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:37,390 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:37,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 20:11:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:37,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 20:11:37,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:37,528 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-25 20:11:37,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2021-11-25 20:11:37,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-25 20:11:37,713 INFO L354 Elim1Store]: treesize reduction 18, result has 53.8 percent of original size [2021-11-25 20:11:37,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 35 [2021-11-25 20:11:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:37,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:37,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:37,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955325035] [2021-11-25 20:11:37,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955325035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:37,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:37,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:11:37,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102949699] [2021-11-25 20:11:37,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:37,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:11:37,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:37,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:11:37,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:11:37,831 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:38,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:38,100 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2021-11-25 20:11:38,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:11:38,101 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-11-25 20:11:38,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:38,101 INFO L225 Difference]: With dead ends: 66 [2021-11-25 20:11:38,101 INFO L226 Difference]: Without dead ends: 66 [2021-11-25 20:11:38,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:11:38,102 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:38,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 102 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2021-11-25 20:11:38,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-25 20:11:38,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-11-25 20:11:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.52) internal successors, (76), 59 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2021-11-25 20:11:38,106 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 13 [2021-11-25 20:11:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:38,107 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2021-11-25 20:11:38,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:38,107 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2021-11-25 20:11:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:11:38,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:38,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:38,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:38,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:38,316 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:38,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:38,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1863398777, now seen corresponding path program 1 times [2021-11-25 20:11:38,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:38,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356463776] [2021-11-25 20:11:38,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:38,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:38,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:38,318 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:38,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 20:11:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:38,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:11:38,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:38,460 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 20:11:38,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 13 treesize of output 23 [2021-11-25 20:11:38,464 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:11:38,604 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:11:38,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-25 20:11:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:38,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:38,740 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:38,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356463776] [2021-11-25 20:11:38,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356463776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:38,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:38,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:11:38,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565894778] [2021-11-25 20:11:38,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:38,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:11:38,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:38,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:11:38,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:11:38,741 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:39,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:39,073 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2021-11-25 20:11:39,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:11:39,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-11-25 20:11:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:39,074 INFO L225 Difference]: With dead ends: 93 [2021-11-25 20:11:39,074 INFO L226 Difference]: Without dead ends: 93 [2021-11-25 20:11:39,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:11:39,075 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 203 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:39,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 88 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2021-11-25 20:11:39,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-25 20:11:39,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2021-11-25 20:11:39,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 56 states have (on average 1.5) internal successors, (84), 65 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2021-11-25 20:11:39,079 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 13 [2021-11-25 20:11:39,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:39,080 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2021-11-25 20:11:39,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2021-11-25 20:11:39,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:11:39,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:39,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:39,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:39,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:39,289 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:39,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:39,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1863406910, now seen corresponding path program 1 times [2021-11-25 20:11:39,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:39,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46694205] [2021-11-25 20:11:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:39,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:39,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:39,291 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:39,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 20:11:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:39,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:11:39,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:39,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:39,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:39,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46694205] [2021-11-25 20:11:39,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46694205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:39,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:39,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:11:39,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632453699] [2021-11-25 20:11:39,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:39,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:11:39,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:39,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:11:39,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:11:39,394 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:39,445 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-11-25 20:11:39,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:11:39,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-11-25 20:11:39,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:39,447 INFO L225 Difference]: With dead ends: 61 [2021-11-25 20:11:39,447 INFO L226 Difference]: Without dead ends: 61 [2021-11-25 20:11:39,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:11:39,448 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:39,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 47 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:11:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-25 20:11:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-25 20:11:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 60 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) [2021-11-25 20:11:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-11-25 20:11:39,451 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 13 [2021-11-25 20:11:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:39,451 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-11-25 20:11:39,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:39,451 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-11-25 20:11:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 20:11:39,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:39,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:39,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:39,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:39,664 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:39,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:39,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1879468086, now seen corresponding path program 1 times [2021-11-25 20:11:39,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:39,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457793968] [2021-11-25 20:11:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:39,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:39,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:39,665 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:39,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 20:11:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:39,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:11:39,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:39,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:39,848 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 20:11:39,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-11-25 20:11:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:39,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:39,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457793968] [2021-11-25 20:11:39,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457793968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:39,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [771967465] [2021-11-25 20:11:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:39,878 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:11:39,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:11:39,882 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:11:39,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-25 20:11:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:40,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:11:40,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:40,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:40,131 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 20:11:40,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-11-25 20:11:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:40,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [771967465] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:40,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542926284] [2021-11-25 20:11:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:40,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:40,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:40,174 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:40,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 20:11:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:40,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:11:40,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:40,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:40,332 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 20:11:40,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-11-25 20:11:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:40,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542926284] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:40,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:11:40,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2021-11-25 20:11:40,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871339009] [2021-11-25 20:11:40,366 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:11:40,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:11:40,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:40,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:11:40,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:11:40,368 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:40,455 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-11-25 20:11:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:11:40,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-11-25 20:11:40,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:40,456 INFO L225 Difference]: With dead ends: 62 [2021-11-25 20:11:40,456 INFO L226 Difference]: Without dead ends: 62 [2021-11-25 20:11:40,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:11:40,457 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:40,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 25 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:11:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-25 20:11:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 43. [2021-11-25 20:11:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) internal successors, (48), 42 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) [2021-11-25 20:11:40,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-11-25 20:11:40,459 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 17 [2021-11-25 20:11:40,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:40,460 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-11-25 20:11:40,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:40,460 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-11-25 20:11:40,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 20:11:40,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:40,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:40,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:40,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:40,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:41,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:41,062 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:41,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1879468087, now seen corresponding path program 1 times [2021-11-25 20:11:41,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:41,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130570690] [2021-11-25 20:11:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:41,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:41,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:41,063 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:41,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-25 20:11:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:41,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:11:41,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:41,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:41,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:11:41,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-25 20:11:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:41,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:41,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130570690] [2021-11-25 20:11:41,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130570690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:41,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [102324047] [2021-11-25 20:11:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:41,674 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:11:41,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:11:41,677 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:11:41,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-25 20:11:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:41,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:11:41,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:41,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:42,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:11:42,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-25 20:11:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:42,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [102324047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:42,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347011945] [2021-11-25 20:11:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:42,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:42,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:42,271 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:42,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 20:11:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:42,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:11:42,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:42,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:42,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:11:42,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-25 20:11:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:42,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347011945] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:42,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:11:42,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-11-25 20:11:42,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280368790] [2021-11-25 20:11:42,787 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:11:42,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:11:42,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:42,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:11:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:11:42,788 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:42,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:42,901 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-11-25 20:11:42,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:11:42,902 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-25 20:11:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:42,902 INFO L225 Difference]: With dead ends: 41 [2021-11-25 20:11:42,902 INFO L226 Difference]: Without dead ends: 41 [2021-11-25 20:11:42,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:11:42,903 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:42,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 30 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:11:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-25 20:11:42,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-11-25 20:11:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.34375) internal successors, (43), 38 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) [2021-11-25 20:11:42,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-25 20:11:42,906 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 17 [2021-11-25 20:11:42,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:42,906 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-25 20:11:42,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-25 20:11:42,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:11:42,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:42,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:42,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:43,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:43,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-25 20:11:43,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:43,521 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:43,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1866031452, now seen corresponding path program 1 times [2021-11-25 20:11:43,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:43,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161878586] [2021-11-25 20:11:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:43,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:43,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:43,525 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:43,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-25 20:11:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:43,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:11:43,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:43,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:11:43,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:11:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:43,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:43,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 20:11:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:43,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:43,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161878586] [2021-11-25 20:11:43,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161878586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:43,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2073747512] [2021-11-25 20:11:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:43,894 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:11:43,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:11:43,897 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:11:43,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-25 20:11:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:44,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:11:44,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:44,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:11:44,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:11:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:44,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:44,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 20:11:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:44,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2073747512] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:44,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208106733] [2021-11-25 20:11:44,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:44,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:44,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:44,401 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:44,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 20:11:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:44,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:11:44,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:44,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:11:44,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:11:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:44,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:44,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 20:11:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:44,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208106733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:44,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:11:44,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 6, 6, 6] total 11 [2021-11-25 20:11:44,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782401442] [2021-11-25 20:11:44,699 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:11:44,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:11:44,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:44,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:11:44,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:11:44,700 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:44,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:44,986 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-11-25 20:11:44,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:11:44,987 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 18 [2021-11-25 20:11:44,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:44,988 INFO L225 Difference]: With dead ends: 42 [2021-11-25 20:11:44,988 INFO L226 Difference]: Without dead ends: 42 [2021-11-25 20:11:44,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:11:44,989 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 120 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:44,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 42 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:11:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-25 20:11:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-11-25 20:11:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.3125) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-25 20:11:44,991 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 18 [2021-11-25 20:11:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:44,991 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-25 20:11:44,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-25 20:11:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 20:11:44,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:44,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:45,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:45,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:45,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-25 20:11:45,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:11:45,593 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:45,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2012400074, now seen corresponding path program 1 times [2021-11-25 20:11:45,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:45,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187973106] [2021-11-25 20:11:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:45,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:45,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:45,595 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:45,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-25 20:11:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:45,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 20:11:45,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:45,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-25 20:11:46,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:11:46,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:11:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:46,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:46,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 20:11:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:46,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:46,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187973106] [2021-11-25 20:11:46,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187973106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:46,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2122691127] [2021-11-25 20:11:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:46,418 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:11:46,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:11:46,419 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:11:46,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-25 20:11:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:46,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:11:46,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:46,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:11:46,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:11:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:46,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:46,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 20:11:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:47,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2122691127] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:47,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607405747] [2021-11-25 20:11:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:47,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:47,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:47,070 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:47,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-25 20:11:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:47,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:11:47,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:47,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:11:47,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-25 20:11:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:47,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:47,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 20:11:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:47,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607405747] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:47,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:11:47,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 6, 6] total 23 [2021-11-25 20:11:47,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251586917] [2021-11-25 20:11:47,640 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:11:47,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 20:11:47,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:47,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 20:11:47,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:11:47,641 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:48,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:48,237 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-25 20:11:48,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:11:48,239 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-25 20:11:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:48,239 INFO L225 Difference]: With dead ends: 41 [2021-11-25 20:11:48,239 INFO L226 Difference]: Without dead ends: 41 [2021-11-25 20:11:48,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2021-11-25 20:11:48,241 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 116 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:48,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 37 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 135 Invalid, 0 Unknown, 18 Unchecked, 0.3s Time] [2021-11-25 20:11:48,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-25 20:11:48,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-11-25 20:11:48,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.28125) internal successors, (41), 36 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) [2021-11-25 20:11:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-11-25 20:11:48,243 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 19 [2021-11-25 20:11:48,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:48,244 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-11-25 20:11:48,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:48,244 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-11-25 20:11:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 20:11:48,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:48,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:48,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:48,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:48,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-25 20:11:48,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:11:48,853 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:48,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2040107238, now seen corresponding path program 1 times [2021-11-25 20:11:48,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:48,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809274857] [2021-11-25 20:11:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:48,855 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:48,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:48,855 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:48,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-25 20:11:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:48,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:11:48,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:49,033 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-25 20:11:49,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 18 [2021-11-25 20:11:49,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:11:49,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:11:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:49,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:49,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-25 20:11:49,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 150 [2021-11-25 20:11:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:49,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:49,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809274857] [2021-11-25 20:11:49,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809274857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:49,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1633710699] [2021-11-25 20:11:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:49,505 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:11:49,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:11:49,509 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:11:49,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-25 20:11:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:49,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 20:11:49,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:49,825 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-25 20:11:49,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 18 [2021-11-25 20:11:49,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:11:49,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-11-25 20:11:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:50,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:50,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-25 20:11:50,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 70 [2021-11-25 20:11:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:50,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1633710699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:50,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900665301] [2021-11-25 20:11:50,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:50,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:50,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:50,249 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:50,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-25 20:11:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:50,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:11:50,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:50,432 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:11:50,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:11:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:50,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:50,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-25 20:11:50,564 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 20:11:50,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 35 [2021-11-25 20:11:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:50,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900665301] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:50,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:11:50,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 6, 5, 5] total 13 [2021-11-25 20:11:50,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108764499] [2021-11-25 20:11:50,629 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:11:50,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:11:50,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:50,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:11:50,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:11:50,630 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 14 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) [2021-11-25 20:11:50,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:50,932 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-11-25 20:11:50,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:11:50,934 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 14 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 20 [2021-11-25 20:11:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:50,934 INFO L225 Difference]: With dead ends: 40 [2021-11-25 20:11:50,934 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 20:11:50,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 18 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:11:50,935 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:50,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 28 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2021-11-25 20:11:50,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 20:11:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-11-25 20:11:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.25) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-25 20:11:50,938 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2021-11-25 20:11:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:50,938 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-25 20:11:50,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 14 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) [2021-11-25 20:11:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-25 20:11:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 20:11:50,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:50,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:50,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-25 20:11:51,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:51,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:51,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:11:51,545 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:51,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:51,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1247947063, now seen corresponding path program 1 times [2021-11-25 20:11:51,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:51,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738065153] [2021-11-25 20:11:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:51,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:51,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:51,547 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:51,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-25 20:11:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:51,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:11:51,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:51,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 20:11:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:51,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:52,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:11:52,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738065153] [2021-11-25 20:11:52,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738065153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:52,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [502705691] [2021-11-25 20:11:52,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:52,256 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:11:52,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:11:52,261 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:11:52,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-25 20:11:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:52,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:11:52,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:52,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 20:11:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:52,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:52,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [502705691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:52,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135386772] [2021-11-25 20:11:52,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:52,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:52,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:52,729 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:52,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-25 20:11:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:52,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:11:52,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:52,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 20:11:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:52,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:53,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135386772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:53,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:11:53,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2021-11-25 20:11:53,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788602507] [2021-11-25 20:11:53,086 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:11:53,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:11:53,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:11:53,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:11:53,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:11:53,087 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:54,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:54,809 INFO L93 Difference]: Finished difference Result 133 states and 145 transitions. [2021-11-25 20:11:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 20:11:54,810 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 20:11:54,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:54,811 INFO L225 Difference]: With dead ends: 133 [2021-11-25 20:11:54,811 INFO L226 Difference]: Without dead ends: 133 [2021-11-25 20:11:54,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2021-11-25 20:11:54,812 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 315 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:54,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 118 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:11:54,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-25 20:11:54,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 82. [2021-11-25 20:11:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 81 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:54,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2021-11-25 20:11:54,816 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 20 [2021-11-25 20:11:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:54,817 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2021-11-25 20:11:54,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:54,817 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2021-11-25 20:11:54,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 20:11:54,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:54,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:54,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:55,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-25 20:11:55,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-25 20:11:55,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:55,421 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-25 20:11:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:55,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1181184967, now seen corresponding path program 1 times [2021-11-25 20:11:55,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:11:55,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876502673] [2021-11-25 20:11:55,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:55,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:11:55,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:11:55,422 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:11:55,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4bd79be-3ae1-4700-9f3a-f4773bf558ea/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-25 20:11:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:55,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 20:11:55,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:55,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-25 20:11:56,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:12:00,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-11-25 20:12:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:12:01,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:12:01,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44